CN106486676A - A kind of graphene lithium ion battery structure - Google Patents
A kind of graphene lithium ion battery structure Download PDFInfo
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- CN106486676A CN106486676A CN201611146149.6A CN201611146149A CN106486676A CN 106486676 A CN106486676 A CN 106486676A CN 201611146149 A CN201611146149 A CN 201611146149A CN 106486676 A CN106486676 A CN 106486676A
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- graphene
- negative electrode
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- lithium ion
- ion battery
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 145
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 127
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 44
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a kind of graphene lithium ion battery structure, including housing and battery core；The enclosure interior is provided with cavity, and the wall portion of the housing is convexly equipped with some bodies to the cavity, and the bar body has deformations；Anode ear and the negative electrode lug of mutually insulated is equipped with the housing；The battery core is placed in the cavity, and contacts with bar body phase at least described in, and the battery core has positive electrode and negative electrode, and the positive electrode is connected with the anode ear, and the negative electrode is connected with the negative electrode lug；The positive electrode has electrode film, arranges grapheme material on the electrode film；The negative electrode has negative electrode plate, arranges graphite material on the negative electrode plate.The present invention proposes the graphene lithium ion battery structure technology for arranging grapheme material on electrode film, and passes through optimization design housing, and the deformations of battery core bar body when mounted are deformed upon so that battery core is more easily installed, and fixed effect is more preferable.
Description
Technical field
The present invention relates to field of batteries, more particularly to, a kind of graphene lithium ion battery structure.
Background technology
Lithium battery is the battery for employing lithium metal or its compound, adopts in positive pole in battery, negative pole or electrolyte
Lithium metal or its compound, with high storage energy density, have reached 460-600Wh/kg, have been about 6-7 times of lead-acid battery；
Lithium battery generally includes lithium metal battery and two big class of lithium ion battery.With the development of microelectric technique, the equipment of miniaturization
Increasing, very high requirement is proposed to power supply.Lithium battery enters the large-scale practical stage therewith.
Graphene（Graphene）It is a kind of material of nanometer scale, with high intensity, high resiliency and high conductivity etc.
Property, Graphene are the two dimensional crystals of the only one layer of atomic thickness for being stripped out from graphite material, being made up of carbon atom, are in
Flat film of the hexangle type in honeycomb lattice.
Graphene is both most thin material, and most tough material, and under equal conditions, fracture strength is than best steel
Taller 200 times.While it has good elasticity again, stretch range can reach the 20% of own dimensions.It is current nature most
Thin, intensity highest material.It is also but most hard nano material that Graphene is currently world most thin, and it is almost fully transparent
2.3% light is absorbed, thermal conductivity factor is up to 5300W/m K, higher than CNT and diamond, its electron mobility surpasses under normal temperature
Cross 15000cm2/ V s, and higher than CNT or silicon crystal, and resistivity ratio copper or silver lower, be that world resistivity is minimum
Material.
But, how to better profit from Graphene and lithium battery be conjointly employed in, be the technical issues that need to address.
Content of the invention
The technical problem to be solved is to provide a kind of new graphene lithium ion battery structure.
Technical scheme is as follows：A kind of graphene lithium ion battery structure, which includes housing and battery core；The shell
Internal portion is provided with cavity, and the wall portion of the housing is convexly equipped with some bodies to the cavity, and the bar body has deformations；Described
Anode ear and the negative electrode lug of mutually insulated is equipped with housing；The battery core is placed in the cavity, and with bar at least described in
So that the deformations of the bar body are deformed upon, the battery core has positive electrode and negative electrode, the positive electricity for body phase contact
Pole is connected with the anode ear, and the negative electrode is connected with the negative electrode lug；The positive electrode has electrode film, the positive electricity
Grapheme material is set on pole piece；The negative electrode has negative electrode plate, arranges graphite material on the negative electrode plate.
Preferably, the first graphene layer is set on the electrode film.
Preferably, first graphene layer is a layer graphene.
Preferably, first graphene layer is two layer graphenes.
Preferably, grapheme material is provided with the negative electrode plate.
Preferably, the second graphene layer is set on the negative electrode plate.
Preferably, second graphene layer is a layer graphene.
Preferably, second graphene layer is two layer graphenes.
Preferably, the negative electrode plate has strip lamellar body structure.
Preferably, the negative electrode plate is graphite lamellar body, is provided with grapheme material on the graphite lamellar body.
Using such scheme, the present invention proposes the graphene lithium ion battery knot for arranging grapheme material on electrode film
Structure technology, and pass through optimization design housing, the deformations of battery core bar body when mounted are deformed upon so that battery core is easier to pacify
Dress, and fixed effect is more preferable.
Description of the drawings
Fig. 1 is the contour structures schematic diagram of one embodiment of the invention.
Fig. 2 is the internal structure schematic diagram of further embodiment of this invention.
Fig. 3 is the internal structure schematic diagram of the wall portion of the housing of further embodiment of this invention.
Fig. 4 is the structural representation of the bar body of the housing of further embodiment of this invention.
Fig. 5 is the structural representation of the bar body of the housing of further embodiment of this invention.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is described in detail, and the following examples can be combined and be made
With, also, the present invention can be realized using various forms, be not limited to this specification each specific embodiment described, provided
The purpose of these embodiments is that the disclosure is more thoroughly comprehensively readily appreciated.Need further exist for explanation
It is, when a certain structure is fixed on another structure, including the structure is directly or indirectly fixed on another structure, or will
The structure is fixed on another structure by one or more of the other intermediate structure.When a structure connects another structure,
Including the structure is directly or indirectly connected to another structure, or by the structure by one or more of the other middle knot
Structure is connected to another structure.Also, described "and/or" include " and " with two kinds of possible embodiments of "or".
One example of the present invention is, a kind of graphene lithium ion battery structure, and which includes housing and battery core；The housing
Inside is provided with cavity, and the wall portion of the housing is convexly equipped with some bodies to the cavity, and the bar body has deformations；The shell
Anode ear and the negative electrode lug of mutually insulated is equipped with body；The battery core is placed in the cavity, and with bar body at least described in
Contact so that the deformations of the bar body are deformed upon, the battery core has positive electrode and negative electrode, the positive electrode
It is connected with the anode ear, the negative electrode is connected with the negative electrode lug；The positive electrode has electrode film, the positive electrode
Grapheme material is set on piece；The negative electrode has negative electrode plate, and using such scheme, the present invention is proposed on electrode film
The graphene lithium ion battery structure technology of grapheme material is set, and passes through optimization design housing, battery core bar when mounted
The deformations of body are deformed upon so that battery core is more easily installed, and fixed effect is more preferable.For example, as shown in Figures 1 and 2, a kind of
Graphene lithium ion battery structure, it include housing 100 and battery core 200；The enclosure interior is provided with cavity, as shown in figure 3, institute
The wall portion 110 for stating housing is convexly equipped with some bodies 111 to the cavity, and the bar body has deformations 112；Wear on the housing
It is provided with anode ear 310 and the negative electrode lug 320 of mutually insulated；The battery core is placed in the cavity, and with bar body at least described in
Contact so that the deformations of the bar body are deformed upon, the battery core has positive electrode 210 and negative electrode 220, described
Positive electrode 210 is connected with the anode ear 310, and the negative electrode 220 is connected with the negative electrode lug 320；The positive electrode 210 has
There is electrode film 211, grapheme material is set on the electrode film；The negative electrode 220 is with negative electrode plate 221, described
Graphite material is set on negative electrode plate.And for example, the electrode film 211 of the positive electrode 210 is connected with the anode ear 310
Connect, the negative electrode plate 221 of the negative electrode 220 is connected with the negative electrode lug 320.As shown in figure 4, the deformations 112
With wave-like, or as shown in figure 5, some rooms 113 are offered on the bar body.
For example, a kind of graphene lithium ion battery structure, which includes housing and battery core.Wherein, the battery core is lithium cell,
For example, the battery core has lithium metal or lithium compound；Battery core is arranged at enclosure interior, is coated by housing；For example, the housing
Sealing or battery core described in non-tight.For example, the enclosure interior is provided with cavity, and the battery core is placed in the cavity, i.e. described
Battery core is placed in the inside cavity, also it is understood that the battery core is placed in the enclosure interior.
The wall portion of the housing is convexly equipped with some bodies to the cavity, and the bar body has deformations；The battery core is held
The cavity is placed in, and is contacted with bar body phase at least described in so that the deformations of the bar body are deformed upon；For example, institute
State bar body and there is elastic material, such as rubber strip, deform upon as the deformations for overall in stress；And for example, institute
State and some rooms on bar body, are offered, the bar body is used for the entirety in stress and sends out in each empty place as the deformations
Raw deformation；For example, the bar body is wave-like, and and for example, the bar body is zigzag fashion.So, the battery core is placed in institute
Cavity is stated, and when the battery core is placed in the cavity, the battery core is contacted with bar body phase at least described in, so that the bar
The deformations of body are deformed upon, for example, deform upon and extrude each room in each empty place such that it is able to
Fix the battery core to a certain extent, certain cushion effect is provided in use, existing rigid contact is instead of, reducing can
The impact force of energy, improves the security that graphene lithium ion battery structure is used.
Wherein, lug is equipped with the housing, lug includes anode ear and negative electrode lug, or, it can be understood as, described
Two lugs are equipped with housing, and two lugs include anode ear and negative electrode lug；For example, mutually insulated is equipped with the housing
Anode ear and negative electrode lug；I.e. lug includes the anode ear and the negative electrode lug, is graphene lithium ion battery infrastructure product
One of structure, for extracting both positive and negative polarity from battery core, such as battery of mobile phone, Bluetooth battery, Notebook Battery etc. are all needed
Lug to be used.Battery is a point both positive and negative polarity, and lug is exactly the metallic conductor extracted both positive and negative polarity from battery core, it will be appreciated that
It is contact point when discharge and recharge is carried out for the ear of battery positive and negative polarities.This contact point includes the copper of the housing appearance of battery
Piece or power connecting sheet, also include the connector of inside battery.For example, lug arranges metal material, and and for example, lug arranges metal material
With film, for example, metal material is metal tape or sheet metal, and wherein, film is the part that insulate on lug, and its effect is electricity
It is short that pond or battery core prevent the metal material of lug and other metals of battery or battery core aluminium from for example occurring between aluminum plastic film when encapsulating
Road, it is preferred that film is bonded together by heating and aluminum plastic film hot-melting sealed and prevents leakage when battery or battery core are encapsulated.Example
Such as, a lug is metal tape or sheet metal to be clipped in the middle by two panels film.For example, the lug arranges the enclosure interior
Body, and from the body extend expose to the housing outer surface contact site, the contact site be used for and outside
Electrical equipment or circuit contact.
In order to lug is protected, for example, pad and protection board are set on the housing, the pad has slot, described
Protection board has the snap-in structure matched with the slot, and the lug wears the housing and its pad, and institute
State lug be located at the hull outside part be placed in the slot, the snap-in structure of the protection board with described
Slot fastens, so that the protection board is not in when being disassembled state, the lug is by the pad and the protection board
Protected, when using, by only needing gentle force, overcome the resistance of the engaging, dismantle the protection board；The protection board
Can be with recycling.And for example, the protection board arranges two cascade terminals, the cascade terminal being respectively used to other protection boards
It is connected, so, each protection board is connected with each other, it is easy to remove；In delivery, it is preferred that each protection board one
Body is arranged.For example, protection board is plastic plate.For ease of lug is used, contact force is lifted, for example, is provided with the slot little
Bullet block, the little bullet block apply export-oriented micro- elastic force to the lug, when the protection board is removed so that the lug occurs
The slight displacement away from electrode.
In order to adapt to the demand of different final products, lug can design different shapes；For example, the anode ear and institute
Stating negative electrode lug all includes rectangular sheet structure；Or, the anode ear all includes circular sheet-like structures with the negative electrode lug；Or
Person, the anode ear all include hemispherical projections structure with the negative electrode lug；Or, the anode ear is all wrapped with the negative electrode lug
Include cylindrical protrusions structure.Laminated structure or bulge-structure can lift application of the lug in the different contact requirements of different product
Effect.For example, the contact site of the anode ear all includes rectangular sheet structure, circle with the contact site of the negative electrode lug
Shape laminated structure, hemispherical projections structure or cylindrical protrusions structure.Preferably, the contact site, including the anode ear
The contact site and the contact site of the negative electrode lug, are provided with elastic deformation position, the elasticity shape of the contact site
Becoming position is used for deforming upon when contacting with outside electrical equipment or circuit in the contact site, so that contact effect is more firm
Lean on.Preferably, the elastic deformation position includes groove, wave-like or zigzag fashion, so, the contact site with outer
When the electrical equipment in portion or circuit contact, the elastic deformation position deforms upon, in the contact site and outside electricity consumption
When equipment or circuit are separated, the elastic deformation position is restored, and so as to enhance contact effect, and can ensure that lug just
Often use, extend its service life.
For example, the anode ear includes aluminum；For example, the anode ear includes metallic aluminium and/or aluminium compound；With/
Or, the negative electrode lug includes nickel material；For example, the anode ear includes metallic nickel and/or nickel compound.For example, the negative pole
Ear includes substrate nickel plating material；For example, substrate is using copper product or aluminum or stainless steel material.For example, the negative electrode lug bag
Include copper nickel plating material.Preferably, the negative electrode lug includes copper nickel plating tin plated materials again.For example, using copper product as substrate,
One end elder generation one layer of nickel coating of plating of the substrate side, one layer of tin coating of plating again on the nickel coating, for example, copper material
Expect for copper sheet or copper strips.Preferably, the negative electrode lug includes copper sheet nickel plating tin plated materials again.For example, the nickel coating thickness is
0.5 micron to 2 microns；And for example, the thickness of the tin coating is 3 microns to 10 microns.
In order to lift conducting effect, it is preferred that the outer surface of the body of the lug also sets up graphene mesh compartment,
For example, the graphene mesh compartment includes one layer, two-layer or multi-layer graphene, as such, it is possible to lug described in significant increase and electricity
The conduct the relation of pole, it is to avoid internal loss.
Wherein, the battery core has positive electrode and negative electrode, and the positive electrode is connected with the anode ear, the negative electrode
It is connected with the negative electrode lug；That is, described battery core has electrode, and the electrode includes positive electrode and negative electrode.For example, the positive electricity
Pole arranges grapheme material；And/or, the negative electrode arranges graphite material.Or, the negative electrode arranges grapheme material.
And for example, the positive electrode also sets up carbon nano-tube material, and the carbon nano-tube material includes CNT；For example, described just
Electrode also sets up one layer of carbon nano-tube material.And for example, the carbon nano-tube material with the mass ratio of the grapheme material is
1:1, so, be conducive to lifting capacity multiplying power and the cryogenic property of graphene lithium ion battery structure.
For example, the positive electrode has electrode film；For example, the electrode film of the positive electrode and the anode ear
Connection；Preferably, the electrode film has strip lamellar body structure；For example, the electrode film has super porous strip
Lamellar body structure；Preferably, the electrode film has strip lamellar body structure, and the strip lamellar body structure has framework knot
Structure, similar to scaffold or grid, is provided with a large amount of intercommunication microcellular structures, in order to embodiments below in the frame structure
Dopant material, wherein, described super many or described be more than million in a large number or even ten million, such as be provided with described frame structure super
Cross 108Individual intercommunication microcellular structure；Dopant material includes grapheme material etc., and described in the embodiment in face specific as follows, here is omitted；
Such structure design, can be with the energy density of significant increase graphene lithium ion battery structure and electronics and ionic conduction energy
Power.For example, the strip lamellar body structure is cuboid, and the length of cuboid and the ratio of width are more than 10；Preferably, rectangular
The ratio of the length of body and height is more than 10.And for example, the positive electrode or electrode film extension wear the housing conduct
The anode ear, i.e., described positive electrode or the electrode film are wholely set with the anode ear.
For example, grapheme material is set on the electrode film, wherein, the grapheme material includes Graphene, example
As the Graphene that thickness is 1 to 10 layer；Graphene be by the planar material of the hexagonal honeycomb lattice of monolayer carbon atomic building
Material, theoretic throat are only 0.34 nanometer, with fabulous architectural characteristic, are particularly suitable as graphene lithium ion battery structure
Materials'use；Common, the charge and discharge process of graphene lithium ion battery structure, it can be understood as cation is in positive and negative electrode
Into and out, therefore in various embodiments of the present invention, by positive electrode or its electrode film, negative electrode or its negative electrode
The design of piece, for example, electrode includes positive electrode and negative electrode, and electrode slice includes electrode film and negative electrode plate so that electrode or
The hole of the accommodating cation in its electrode slice increases, is easy to abjection, so as to lift graphene lithium ion battery structure discharge and recharge
Speed, wherein, the hole of Graphene is about 90 to 320 ran.After tested, including each enforcement of above-mentioned technical characteristic
Example, is meeting 5C（The quantity of electric charge of the unit interval by conductors cross, 1A are equal to 1C/s）Under the conditions of, can be full of in 15 minutes
5000mAh, and fast charging and discharging is realized, and can work under -30 ~ 80 DEG C of environment, cycle life more up to 3500 times or so.
In order to improve the chemical property of positive electrode, for example, the grapheme material is nanoscale doped graphene material
Material, adulterate in the Graphene of the nanoscale doped graphene material at least one nano level metal or nano level metal chemical combination
Thing；Wherein, the maximum length or maximum particle diameter of nano level metal or nanosized metal compound is less than 30 to 50 nanometers；It is preferred that
, dopen Nano level vanadium oxide is gone back in the grapheme material, for example, nanoscale vanadium is nanoscale vanadium dioxide or nanometer
Level vanadic anhydride；For example, nanoscale vanadium is that maximum length or maximum particle diameter are less than 30 to 50 nanometers；And for example, nanoscale
Vanadium oxide is 5% to 10%, preferably 6% to 8% with the mass ratio of Graphene, the quality of such as nanoscale vanadium and Graphene
Ratio is 7%.Graphene is modified processing by dopen Nano level vanadium oxide, can be realized with significant increase charge efficiency
" sudden strain of a muscle is filled " effect, the charging interval of the graphene lithium ion battery structure of 20000mAh or even higher capacity can control at 1 point
Within clock, the charging interval of charging interval of the graphene lithium ion battery structure of 10000mAh in laboratory is less than 20 seconds.Excellent
Choosing, dopen Nano level ruthenic oxide is gone back in the grapheme material, nanoscale ruthenic oxide with the mass ratio of Graphene is
0.5% to 1.5%, preferably 1% to 1.2%, such as nanoscale ruthenic oxide is 1.1% with the mass ratio of Graphene.Nanoscale two
Ruthenium-oxide stable chemical nature, coordinates nanoscale vanadium, and also certain catalytic action contributes to lifting the hole of Graphene
Turnover efficiency, so as to lift charge efficiency；Charged before and after test contrast, the nanoscale doped graphene material is after charging
Discovery lithium peroxide ion is there is no, the nanoscale doped graphene material after discharge, is present in Graphene hole
Basic fully loaded lithium peroxide ion.Preferably, also adulterate in the grapheme material nitrogen-atoms, i.e. nitrogen-doped graphene, this
Sample is conducive in the high local electric charge of graphenic surface induced synthesis and spin density, so as to improve its chemism, but greatly
The nitrogen atom doping of amount can reduce its structural stability in Graphene lattice, then, and therefore the content of nitrogen is unsuitable too high, preferably
, nitrogen is 0.05% to 0.6% with the mass ratio of Graphene；Preferably 0.1% to 0.2%；The mass ratio of such as nitrogen and Graphene
Example is 0.15%.
For example, grapheme material is set on the electrode film, and the grapheme material includes the first graphene layer, and
Such as, the first graphene layer is set on the electrode film.Preferably, first graphene layer is a layer graphene；Or, institute
The first graphene layer is stated for two layer graphenes.Preferably, first graphene layer includes a layer graphene or two layer graphenes,
Also, it is nanoscale doped graphene material per layer graphene, i.e. be one layer of nanoscale doped graphene material per layer graphene
Material, also can be regarded as every layer graphene for a nanoscale doped graphene material layer；Preferably, the electrode film has phosphoric acid
Iron lithium piece body, for example, the LiFePO4 lamellar body has strip lamellar body structure, and other embodiment is by that analogy；And for example, described
The grapheme material and/or first graphene layer are set on LiFePO4 lamellar body, and other embodiment is by that analogy；Again
Such as, the grapheme material at least partly covers the LiFePO4 lamellar body.Preferably, the grapheme material all covers institute
State LiFePO4 lamellar body.And for example, the electrode film has lithium nickel cobalt manganese lamellar body, and the grapheme material at least partly covers institute
State LiFePO4 lamellar body.Preferably, the grapheme material all covers the lithium nickel cobalt manganese lamellar body.And for example, the positive electrode
Piece has cobalt acid lithium lamellar body, and the grapheme material at least partly covers the LiFePO4 lamellar body.Preferably, the Graphene
Material all covers the cobalt acid lithium lamellar body.And for example, the electrode film has LiMn2O4 lamellar body, and the grapheme material is at least
Part covers the LiFePO4 lamellar body.Preferably, the grapheme material all covers the LiMn2O4 lamellar body.
For example, the negative electrode has negative electrode plate, for example, the negative electrode plate of the negative electrode and the negative electrode lug
Connection.And for example, the negative electrode or negative electrode plate extension wear the housing as the negative electrode lug, i.e., described negative electrode
Or the negative electrode plate is wholely set with the negative electrode lug.Preferably, the negative electrode plate has strip lamellar body structure, and institute
State strip lamellar body structure and there is frame structure, similar to scaffold or grid, in the frame structure, be provided with a large amount of intercommunications
Microcellular structure, in order to the dopant material of embodiments below, wherein, described is more than million or even ten million in a large number, such as institute
State in frame structure and be provided with more than 108Individual intercommunication microcellular structure；Dopant material includes grapheme material etc., the reality in face specific as follows
Apply described in example, here is omitted.For example, the negative electrode plate has Li2.6Co0.4N, wherein, Li2.6Co0.4N is layer structure,
Li2N formation aspect lithium is embedded in interlayer, and Co substitutes part lithium rock-steady structure, and this structure has very high embedding lithium capacity, relatively
Good cycle performance, more rational intercalation potential, average intercalation potential are about 0.3V；In order to lift efficiency for charge-discharge, it is preferred that
Also with Sn base complex, such as Sn base composite oxidate or Sn base complex nitride, for example, Sn base is combined the negative electrode plate
Thing and Li2.6Co0.4The mass ratio of N is 5% to 20%.Using Sn base complex and Li2.6Co0.4The combination electrode material of N possesses
Preferable electrical property, efficiency for charge-discharge is up to 100% within first week.Preferably, the negative electrode plate has Li4Ti5O12（Spinelle
Structural lithium titanate）, lithium titanate with spinel structure structure during Lithium-ion embeding, abjection has almost no change, with preferable
Security and excellent cycle performance.For example, Li4Ti5O12For nanoscale Li4Ti5O12.Preferably, the negative electrode plate has
Carbon parcel or the nanoscale Li of graphite parcel4Ti5O12.Preferably, the negative electrode plate has Li2.6Co0.4N and Li4Ti5O12, two
The mass ratio of person is 1:（4~6）, wherein, Li2.6Co0.4N is nanoscale Li2.6Co0.4N, Li4Ti5O12Wrap up for carbon or graphite
The nanoscale Li of parcel4Ti5O12.For example, Li2.6Co0.4N and Li4Ti5O12, both mass ratios are 1:5.Preferably, described
Negative electrode plate has Li2.6Co0.4N and Li4Ti5O12, both mass ratios are 1:（4~6）, wherein, Li2.6Co0.4N is nanometer
Level Li2.6Co0.4N, Li4Ti5O12Nanoscale Li for Graphene parcel4Ti5O12.Further, the negative electrode plate has graphite
The nanoscale Li of alkene parcel2.6Co0.4N and nanoscale Li4Ti5O12, both mass ratios are 1:（4~6）.As such, it is possible to notable
Improve specific capacity, high rate capability and the cyclical stability of graphene lithium ion battery structure.
For example, graphite material is set on the negative electrode plate.For example, the graphite material includes native graphite or artificial stone
Ink；Graphite is layer structure, is piled up by carbon network plane and forms, and interlamellar spacing is about 0.34nm.Plane carbon-coating is in hexagonal by carbon atom
Shape arrangement simultaneously extends to two-dimensional directional, is combined with weak Van der Waals force between carbon-coating, and so, lithium can be embedded between carbon-coating.Graphite
Actual specific capacity be 320 to 340mAh/g.Average intercalation potential is about 0.1V, first week efficiency for charge-discharge be about 82% to
84%, good cycle, and cheap.
For lifting efficiency for charge-discharge, it is preferred that be provided with grapheme material on the negative electrode plate.Grapheme material is used as
During lithium ion battery negative material, the electrochemical energy storage performance of Graphene is better than graphite, and its charging rate faster than graphite ten
Times such that it is able to quick charge is realized, additionally, the load capacity of graphene lithium ion battery structure can also get a promotion.For
Graphite cathode, lithium ion can be deposited on negative terminal surface and form dendrite, and Graphene ideally solves this problem so that lithium ion can
Stored well between graphene film by the small hole on surface 10 to 20nm, while realizing quick charge and energy most
Good storage, storage energy can improve nearly 10 times.For example, graphite material and grapheme material are provided with the negative electrode plate,
Both mass ratios are（3~5）:1.Preferably, the second graphene layer is set on the negative electrode plate.Preferably, described second
Graphene layer is a layer graphene；Or, second graphene layer is two layer graphenes.Preferably, the negative electrode plate is
Graphite lamellar body, is provided with grapheme material on the graphite lamellar body；For example, second Graphene is set on the graphite lamellar body
Layer.So, be on the one hand using graphene sheet layer pliability buffering negative electrode or negative electrode plate in multiple cyclic process
Volume Changes, on the other hand can improve electrical contact between material granule to reduce pole using the excellent electric conductivity of Graphene
Change such that it is able to lift the chemical property of graphene lithium ion battery structure.It should be noted that generally only just
Electrode arranges grapheme material with negative electrode, it may be necessary to be respectively provided with Graphene material in positive electrode with negative electrode
Material, however it is necessary that through its performance of experimental test.
For example, the battery core has positive electrode, barrier film and negative electrode, and it is negative with described that the barrier film is arranged at the positive electrode
Between electrode.For example, the matrix material of barrier film includes polypropylene and/or polythene material.With some microcellular structures on barrier film,
For example, the microcellular structure is circular, oval, fusiformis or flat pattern；For example, the barrier film be individual layer PP, individual layer PE or
Three layers of PP/PE/PP composite membrane.Preferably, the barrier film is single-layer septum.For example, the single-layer septum is polyethylene film；Or
Person, the single-layer septum are polypropylene film.Preferably, the barrier film is laminated diaphragm.For example, the laminated diaphragm is three layers
Film.For example, the three-layer membrane is three-layer polypropylene film.Preferably, the barrier film is composite diaphragm, also known as MULTILAYER COMPOSITE
Film.For example, the composite diaphragm is the complex of polyethylene film and polypropylene film.Preferably, the composite diaphragm is poly-
The complex of vinyl film, polypropylene film and chlorinated polypropylene film, or polypropylene film, polyethylene film and polypropylene are thin
The complex of film.The microcellular structure of barrier film is most important to battery safety, when battery is overcharging or temperature is too high
In the case of, barrier film can close hole, form open circuit in inside battery, limit electric current and raise, prevent temperature from raising further.Barrier film
Closed pore temperature relevant with the base material which uses, the closed pore temperature of PP barrier film is higher, while fusing-off temperature is also very high；PE barrier film
Closed pore temperature and fusing-off temperature all relatively low.Wherein, fusing-off temperature is referred in this temperature or more, and barrier film melts contraction completely, electricity
Pole internal short-circuit produces high temperature, causes battery to disintegrate even and explodes.It is therefore preferable that with relatively low closed pore temperature and higher molten
The multilayer complex films of disconnected temperature.The application of multilayer complex films combines the advantage of the two, and PE can play molten between two-layer PP
The effect of disconnected fuse.Be short-circuited during in order to avoid overcharging, and for example, wherein a layer in multilayer complex films, such as three layers every
Intermediate layer or any layer in film, is also coated with aluminum oxide coating.
In order to lift the resistance to elevated temperatures of barrier film, it is to avoid barrier film causes inside battery short because rupture of membranes or contraction high temperature occur
The potential safety hazard brought by road, it is preferred that the surface of barrier film also sets up a nanometer protective layer, for example, the nanometer protective layer includes
Nanoscale chitin fiber layer, nanoscale polyurethane chitin fiber layer, nanoscale polyvinylidene fluoride layer, nanometer grade silica
Layer and/or nanoscale alundum (Al2O3) layer etc..For example, a surface of barrier film arranges nanoscale chitin fiber layer, and/or, every
Another surface of film arranges nanometer grade silica layer；And for example, a surface of barrier film arranges nanoscale polyurethane chitin fiber
Layer, and/or, another surface of barrier film arranges nanometer grade silica layer and nanoscale chitin fiber layer.So, using nanometer
Protective layer, especially nanoscale chitin fiber layer etc., on the one hand can lift the resistance to elevated temperatures of barrier film, on the other hand can
The physical strength of lifting barrier film so as to be difficult rupture of membranes.
For example, the battery core has positive electrode, electrolyte, barrier film and negative electrode, and the barrier film is arranged at the positive electrode
Between the negative electrode；Wherein, it is preferred that the electrolyte includes lithium salts.Preferably, the electrolyte also includes sodium salt.
Preferably, the sodium salt is less than 30% with the mass ratio of the lithium salts.Preferably, the lithium salts includes lithium perchlorate；And/or,
The lithium salts includes lithium hexafluoro phosphate；And/or, the lithium salts includes LiBF4.Using suitable electrolyte, contribute to carrying
Rise and diffusion rate and electrical conductivity is improved, that is, lift the performance of graphene lithium ion battery structure.
Preferably, the electrolyte includes polymer, i.e., described electrolyte includes polymer dielectric.For example, described poly-
Compound is gelatin polymer.Preferably, the polymer is porous gel polymer.Gelatin polymer, also known as polymer gel,
It is a kind of material special state between a solid and a liquid, the properties of existing solid, such as have outside certain geometry
Shape, certain intensity, elasticity and yield value etc.；Also there are some properties of liquid, such as diffusion rate of the ion in gel is close to
In diffusion rate of the ion in respective liquid electrolyte, its electrical conductivity is close to liquid organic electrolyte.For example, poly- in solid-state
By one or more plasticizer are added in polymer electrolyte form gel polymer electrolyte.Gel polymer electrolyte is permissible
Obtained by chemical crosslinking and the mechanism being physical crosslinking.
For example, the gelatin polymer includes ethylene oxide unit and propylene oxide unit.In order to improve diffusion rate and
Electrical conductivity, it is preferred that the gelatin polymer includes PVDF, PMMA and PVDF three-decker, so, outer layer PVDF is tied for porous
Structure, provides good ion channel；Intermediate layer PMMA is solid construction, with good absorbent；And it is possible to solve
PMMA polymer problems of dissolution in the electrolytic solution, can lift raising diffusion rate and electrical conductivity.Preferably, the gel gathers
Compound also includes some Graphenes, and for example, the gelatin polymer also includes the Graphene that mass ratio is 1% to 5%, i.e. stone
Black alkene is 1% to 5% in the mass ratio of whole gelatin polymers.Due to the special construction of the two-dimentional high-specific surface area of Graphene,
Therefore the gelatin polymer that with the addition of Graphene has extremely excellent electron transport ability.Gelatin polymer using Graphene
As electrolyte, or, the electrolyte includes the gel polymer electrolyte with Graphene, also referred to as Graphene gel
Polymer dielectric, by using the electron transport ability of Graphene, can be provided simultaneously with conventional batteries with lithium ion battery
Advantage, is particularly suitable as the use of graphene lithium ion battery structure.Preferably, the gelatin polymer also includes additive,
Additive is 0.5% to 3% in the mass ratio of whole gelatin polymers.For example, the additive includes organic solvent, for example,
The additive includes maleimide or derivatives thereof.Preferably, the additive also includes esters, such as ethyl acetate,
Ethyl propionate, propylene carbonate etc..
The extent of injury of explosion danger is there may be to reduce graphene lithium ion battery structure continuous high temperature, for example,
The wall portion of the housing wears some through holes；So, when blast occurring or burning, gases at high pressure can be released from through hole
Part, it is to avoid break out excessively violent such that it is able to the power of releive blast or burning.In order to keep the closed environment of battery core,
Preferably, film is set on each through hole so that the enclosure interior forms sealed environment or near-hermetic environment；This
, there is explosion time in sample, the physical strength of film is less than the physical strength of wall portion, and film splits in advance, and gases at high pressure can be first
Part is released from through hole, the threat for housing or wall portion is just smaller, or even can also protect wall portion.For example, the housing
With top, wall portion and bottom, for the ease of production, the inner surface setting thin film of the wall portion, the interior table of the wall portion
Face is one side of the wall portion to the cavity, that is, the wall portion of the housing is convexly equipped with the one of some bodies to the cavity
Face；For example, the film is plastic sheeting；Preferably, the film is single permeable membrane, and single permeable membrane has from the housing
Portion to the unidirectional permeability of the hull outside, the gas molecules of wherein described enclosure interior can from the enclosure interior to
The hull outside loss；This way it is possible to avoid the bulge accident due to the excessive generation of internal pressure, moreover it is possible to which blast danger is occurring
Single permeable membrane is first passed through before danger dissipates out portion gas, when there is explosion danger, the film or single permeable membrane elder generation
Row splits, and gases at high pressure first can release part from through hole, so as to reduce brisance, can provide certain guarantor to user
Shield.Preferably, using some scattered gas passages of product also matching design of the graphene lithium ion battery structure, can reach more
Good safe effect.
Preferably, the aperture of the through hole is less than 100 nanometers；For example, the aperture of the through hole is less than 50 nanometers；It is preferred that
, the aperture of the through hole is less than 10 nanometers.Preferably, the housing includes shell and inner casing, and the shell arranges some institutes
State through hole.Preferably, the physical strength of the inner casing is less than the physical strength of the shell；So, when causing danger, inner casing
First debacle, absorbs part energy, then by each described through hole pressure release of the shell, can provide certain guarantor to user
Shield.Preferably, the inner casing have mesh-structured, the mesh-structured aperture more than the through hole aperture.For example, described
Mesh-structured area exceedes 2 times of the area of the through hole.Preferably, the mesh-structured area exceedes the through hole
7 times of area.And for example, the intensity of the inner casing is more than the intensity of the shell.For example, the intensity with mesh-structured inner casing
More than the intensity of the shell, as such, it is possible to carry out multilayer pressure release by mesh-structured with through hole.Preferably, the mesh knot
Structure and through hole setting straggly, i.e., described mesh-structured non-with the through hole be oppositely arranged, in other words, described mesh-structured
Extend parallel with the extension of the through hole and completely misaligned, so, explosion gas can not directly through described mesh-structured with
The through hole, needs slightly to disperse between the inner casing and the shell or bend such that it is able to reduce to a certain extent
Brisance.Preferably, flame-retardant layer, the such as oxidation of aluminium based flame retardant such as three two are additionally provided between the inner casing and the shell
Aluminium, or organic phosphates fire retardant etc.；And for example, the flame-retardant layer is coating, and for example, the flame-retardant layer is flame retardant coating, for example,
The flame retardant coating apply located at the inner casing towards the shell or the shell towards the inner casing while；Again
Such as, the inner casing is chitin fiber layer, and which is coated with the flame retardant coating towards the one side of the shell.So, with preferable
Anti-riot flame retardant effect.
Further, embodiments of the invention also include, each technical characteristic of the various embodiments described above, are mutually combined to be formed
Graphene lithium ion battery structure, also referred to as lithium battery or Graphene lithium battery.
It should be noted that above-mentioned each technical characteristic continues to be mutually combined, the various embodiments not being enumerated above are formed,
It is accordingly to be regarded as the scope of description of the invention record；Also, for those of ordinary skills, can add according to the above description
To improve or convert, and all these modifications and variations should all belong to the protection domain of claims of the present invention.
Claims (10)
1. a kind of graphene lithium ion battery structure, it is characterised in that including housing and battery core；
The enclosure interior is provided with cavity, and the wall portion of the housing is convexly equipped with some bodies to the cavity, and the bar body has
Deformations；
Anode ear and the negative electrode lug of mutually insulated is equipped with the housing；
The battery core is placed in the cavity, and contacts with bar body phase at least described in so that the deformations of the bar body are sent out
Raw deformation, the battery core have positive electrode and negative electrode, and the positive electrode is connected with the anode ear, the negative electrode with described
Negative electrode lug connects；
The positive electrode has electrode film, arranges grapheme material on the electrode film；
The negative electrode has negative electrode plate, arranges graphite material on the negative electrode plate.
2. graphene lithium ion battery structure according to claim 1, it is characterised in that arrange first on the electrode film
Graphene layer.
3. graphene lithium ion battery structure according to claim 2, it is characterised in that first graphene layer is a layer
Graphene.
4. graphene lithium ion battery structure according to claim 2, it is characterised in that first graphene layer is two-layer
Graphene.
5. graphene lithium ion battery structure according to claim 1, it is characterised in that be provided with stone on the negative electrode plate
Black alkene material.
6. graphene lithium ion battery structure according to claim 5, it is characterised in that arrange second on the negative electrode plate
Graphene layer.
7. graphene lithium ion battery structure according to claim 6, it is characterised in that second graphene layer is a layer
Graphene.
8. graphene lithium ion battery structure according to claim 6, it is characterised in that second graphene layer is two-layer
Graphene.
9. graphene lithium ion battery structure according to claim 1, it is characterised in that the negative electrode plate has strip
Lamellar body structure.
10. graphene lithium ion battery structure according to claim 9, it is characterised in that the negative electrode plate is graphite flake
Body, is provided with grapheme material on the graphite lamellar body.
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| CN201611146149.6A CN106486676A (en) | 2016-12-13 | 2016-12-13 | A kind of graphene lithium ion battery structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611146149.6A CN106486676A (en) | 2016-12-13 | 2016-12-13 | A kind of graphene lithium ion battery structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088059A (en) * | 2018-08-01 | 2018-12-25 | 桑顿新能源科技有限公司 | A kind of lithium ion battery and preparation method thereof |
| WO2019056977A1 (en) * | 2017-09-19 | 2019-03-28 | 青海盈天能源有限公司 | Graphene battery core tab produced by semiconductor etching technology and manufacturing method therefor |
| CN111313240A (en) * | 2020-02-29 | 2020-06-19 | 安徽艾瑞环境科技有限公司 | Flat graphene high-energy ion core device and manufacturing method thereof |
| WO2021189450A1 (en) * | 2020-03-27 | 2021-09-30 | 宁德新能源科技有限公司 | Electrochemical device and electronic apparatus comprising same |
-
2016
- 2016-12-13 CN CN201611146149.6A patent/CN106486676A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019056977A1 (en) * | 2017-09-19 | 2019-03-28 | 青海盈天能源有限公司 | Graphene battery core tab produced by semiconductor etching technology and manufacturing method therefor |
| CN109088059A (en) * | 2018-08-01 | 2018-12-25 | 桑顿新能源科技有限公司 | A kind of lithium ion battery and preparation method thereof |
| CN111313240A (en) * | 2020-02-29 | 2020-06-19 | 安徽艾瑞环境科技有限公司 | Flat graphene high-energy ion core device and manufacturing method thereof |
| WO2021189450A1 (en) * | 2020-03-27 | 2021-09-30 | 宁德新能源科技有限公司 | Electrochemical device and electronic apparatus comprising same |
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