CN108346801A - the positive electrode of lithium ion battery - Google Patents
the positive electrode of lithium ion battery Download PDFInfo
- Publication number
- CN108346801A CN108346801A CN201710059693.5A CN201710059693A CN108346801A CN 108346801 A CN108346801 A CN 108346801A CN 201710059693 A CN201710059693 A CN 201710059693A CN 108346801 A CN108346801 A CN 108346801A
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- China
- Prior art keywords
- positive electrode
- ion battery
- lithium ion
- layer
- active material
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Classifications
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- 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
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- 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
-
- 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
Abstract
A kind of positive electrode of lithium ion battery, including the first current collector, positive electrode active material layer and the carbon layer that is arranged between first current collector and the positive electrode active material layer in the first current collector side are set, wherein the positive electrode active material layer includes multiple first material granules, which has the graphene shell on the surface for being formed in first material granule.
Description
Technical field
The present invention relates to the lithium ion batteries that a kind of lithium ion battery more particularly to a kind of reserve of electricity are promoted.
Background technology
With advances in technology and the attention of environmental consciousness, secondary cell are widely used in various fields, such as electricity
Motor-car, mobile electronic device or boat too device, for present situation, the reserve of electricity of secondary cell does not meet needed for market, therefore
Many battery manufacturers strongly develop the secondary cell of high reserve of electricity to solve existing issue.
Such as TaiWan, China patent announcement I 474543, a kind of lithium battery, including a separation layer, an anode structure are proposed
And there is a first surface and the second surface relative to the first surface, the anode to tie for a negative pole structure, the separation layer
Structure setting has an anode layer and a positive pole current collections layer in the first surface, two sides of the anode layer be connected to this first
Surface and the positive pole current collections layer, negative pole structure setting have a negative electrode layer and a cathode current-collecting layer in the second surface, this is negative
Two sides of pole layer are separately connected the second surface and the cathode current-collecting layer, wherein the positive pole current collections layer and/or the cathode current-collecting layer
Material be mainly made of one first carbon materials and one second carbon materials, the ratio of the specific surface area of first carbon materials and second carbon materials
The ratio of surface area is in 2 to 300 range, in the positive pole current collections layer and/or the cathode current-collecting layer, first carbon materials with should
The weight ratio of second carbon materials is 2：1 to 1：In 1 range, which is graphite powder with second carbon materials.
Among the above prior art, the positive pole current collections layer and the anode layer are to each other and the cathode current-collecting layer is negative with this
The electric conductivity of pole layer to each other still has improved space, to promote the reserve of electricity of lithium ion battery.
Invention content
The main object of the present invention is to solve the problems, such as that existing lithium ion battery reserve of electricity is insufficient.
In order to achieve the above object, the present invention provides a kind of positive electrode of lithium ion battery, including one first current collector, a setting
It is arranged in first current collector and the positive electrode active material in the positive electrode active material layer of the first current collector side and one
Carbon layer between the bed of material, the wherein positive electrode active material layer include multiple first material granules, first material
Particle has the graphene shell on a surface for being formed in first material granule.
In an embodiment of the present invention, which is a graphene layer, which has a La between 1
μm to the diameter and the number of plies between 1 to 10 between 50 μm, the value that wherein La is obtained by one by Raman spectrum.
As known from the above, accessible effect is the present invention compared to the prior art：
(1) large-area graphene layer, the graphene are set between first current collector and the positive electrode active material layer
Layer has diameters (value that the La by one by Raman spectrum obtained) of the La between 1 μm to 50 μm, can promote the afflux
Electric conductivity between device and the active material layer.
(2) it since the active material particle in the positive electrode active material layer has the graphene shell, can carry
The electric conductivity of the active material particle is risen, therefore total reserve of electricity of the lithium ion battery improves.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Description of the drawings
Fig. 1 is the lithium ion battery structure schematic diagram of one embodiment of the invention；
Fig. 2 is the second carbon material layer part-structure schematic diagram of further embodiment of this invention.
Specific implementation mode
It is related to detailed description of the invention and technology contents, now just cooperation description of the drawings is as follows：
Please arrange in pairs or groups refering to fig. 1, be the lithium ion battery structure schematic diagram of one embodiment of the invention, including one just shown in Fig. 2
Electrode 10, a negative electrode 20 and an isolation film 30, the positive electrode 10 include one first current collector 11, an active positive electrode material
Layer 12 and a carbon layer 13, the material of first current collector 11 can be aluminium, copper, iron, nickel, platinum, tungsten, molybdenum, tantalum, niobium,
Vanadium, chromium, titanium, zirconium or said combination.The positive electrode active material layer 12 setting is implemented in 11 side of the first current collector one
Example, the positive electrode active material layer 12 include multiple active material particles 121, which includes one first material
Material particle 1210 and one is formed in the graphene shell 1211 on a surface of first material granule 1210, the active material
Grain 121 overlies one another and contacts, and wherein first material granule 1210 can be iron lithium phosphate, lithium nickel cobalt, lithium nickel cobalt manganese, cobalt acid
Lithium, lithium nickelate, LiMn2O4 or said combination；The method of the graphene shell 1211 is formed on first material granule 1210 simultaneously
It is not particularly limited, for example, puddle comminution granulation using one and one graphene is coated on being somebody's turn to do for first material granule 1210
Surface, then by one have a baking temperature between 50 DEG C to 300 DEG C toasted by be made, at this point, this first
The surface portion of material granule 1210 or fully through the graphene coated.
The carbon layer 13 is arranged between first current collector 11 and the positive electrode active material layer 12, in this hair
In bright, the carbon layer 13 be a graphene layer, the graphene layer have diameters of the La between 1 μm to 50 μm with
And the number of plies between 1 to 10, the value that wherein La is obtained by one by Raman spectrum.
The negative electrode 20 and the positive electrode 10 are separately positioned, and the negative electrode 20 includes one second current collector 21, one
Negative electrode active material layer 22 and one second carbon material layer 23, the material of second current collector 21 can be aluminium, copper, iron, nickel,
Platinum, tungsten, molybdenum, tantalum, niobium, vanadium, chromium, titanium, zirconium or said combination.The negative electrode active material layer 22 is arranged in second current collector 21
Side, in an embodiment, which can be that existing applicable carbon material in a preferred embodiment should
(the wherein La is one by Raman to carbon material of the negative electrode active material layer 22 including diameters of the La between 1 μm to 50 μm
The value that spectrum is obtained), for example a graphite, a graphene, or combinations thereof.Second carbon material layer 23 is arranged in second afflux
Between device 21 and the negative electrode active material layer 22, in the present invention, it includes 1 to 10 layer big face which, which is one,
Long-pending graphene layer 231, the graphene layer 231 have diameters of the La between 1 μm to 50 μm.
It please continue reference chart 2.In an embodiment, which includes multiple silicon particles 232, those silicon particles
232 contact with the graphene layer 231, wherein the silicon particle 232 have one between 10nm to the grain size between 100nm, such as
One sphere formed with silene.During the lithium ion battery charge and discharge, lithium ion can the freely in or out silicon particle
232, cause the volume of the silicon particle 232 acutely to change, if selecting the silicon particle 232 of greater particle size that can lead to the silicon particle
232 are disintegrated and lose the effect for promoting reserve of electricity, therefore the silicon particle 232 relative to lithium ion compared with small particle is selected in this case, can
The silicon particle is prevented to be disintegrated because of violent volume change, to promote the service life of the lithium ion battery.
In order to strengthen the combination of the silicon particle 232 and the graphene layer 231, in one embodiment, the table of the silicon particle 232
Face is coated with one first clad 233, and the graphene layer 231 is coated with one second clad 234 simultaneously.About first packet
There is no particular restriction for the material of coating 233 and second clad 234, as long as first clad 233 and second clad
234 can generate a chemical bonded refractory and connect each other, and for example, which hands over second clad 234
Connection or first clad 233 carry opposite-sign respectively with second clad 234 and connect, right of the invention and not only
It is limited to this.
The non-limiting examples of material about first clad 233 include：Macromolecule with sulfonic acid functional group, such as
Kayexalate salt (poly (sodium 4-styrene sulfonate), poly- (2- acrylamide-2-methyl propane sulfonics
(poly(2-acrylamido-2-methyl-1-propanesulfonic acid)；Macromolecule with carbonic acid functional group；Sun
Ion exchange resin；Polyvinyl alcohol (polyvinyl alcohol)；And/or polyacrylic acid (polyacrylic acid) or poly-
Acrylic acid sodium salt (poly (sodium acrylate)).As for the non-limiting examples packet of the material of second clad 234
It includes：Poly- quarternary ammonium salt；Anion exchange resin；Polyvinyl alcohol (polyvinyl alcohol)；Poly- diallyl dimethylammonium chloride
Ammonium (polydiallyldimethylammonium chloride), dodecyl trimethyl ammonium bromide
(dodecyltrimethylammonium bromide), polyacrylamide hydroxypropyltrimonium chloride (poly
(acrylamido-N-propyl trimethyl ammonium chloride), poly- 3- methyl propanamides oxypropyl trimethyl chlorine
Change ammonium (poly ((3-methacryloylamino-propyl trimethylammonium chloride), poly- Aluminium Hydroxide Powder(to make Alum.Sulfate)
Allylamine (poly (allylamine hydrochloride), poly dimethyl amino methyl chlorine quaternary ammonium salt (poly
(dimethylaminoethylacrylate methylchloride quat) and/or polymethylacrylic acid dimethylamino first
Base chlorine quaternary ammonium salt (poly (dimethylaminoethylmethacrylate methylchloride quat).
In order to more ensure the binding force between the graphene layer 231 and the silicon particle 232, conductive effect, Jin Ergai are promoted
It is apt to the efficiency for charge-discharge of the secondary cell, further includes a third on the surface of first clad 233 and second clad 234
Clad 235, to ensure that the silicon particle 232 is effectively contacted with the surface of the graphene layer 231.The third clad 235
Material citing can be carbon containing conductive film, but there is no particular restriction to this by the present invention.
The isolation film 30 is folded between the positive electrode 10 and the negative electrode 20, and the material citing of the isolation film 30 can be poly-
Ethylene (Polyethylene, abbreviation PE), polypropylene (Polypropylene, abbreviation PP), or combinations thereof, the present invention is not with this
It is limited.
In conclusion due to this case respectively between first current collector and the positive electrode active material layer and this
The graphene layer of large area is set between two current collectors and the negative electrode active material layer, to promote the current collector and the activity
Electric conductivity between material layer；In addition, being somebody's turn to do since the surface of first material granule of the positive electrode active material layer has
Graphene shell, therefore the electric conductivity of first material granule can be promoted, therefore total reserve of electricity of the lithium ion battery improves.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe
It knows those skilled in the art and makes various corresponding change and deformations, but these corresponding changes and change in accordance with the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (7)
1. a kind of positive electrode of lithium ion battery, which is characterized in that including：
One first current collector；
One is arranged the positive electrode active material layer in the first current collector side；And
One is arranged the carbon layer between first current collector and the positive electrode active material layer；
Wherein the positive electrode active material layer includes multiple active material particles, which includes one first material
Grain and one be formed in first material granule a surface graphene shell.
2. the positive electrode of lithium ion battery as described in claim 1, which is characterized in that the carbon layer is a graphene
Layer, the graphene layer have diameters and a number of plies between 1 to 10 between of the La between 1 μm to 50 μm, wherein should
La is a value obtained by Raman spectrum.
3. the positive electrode of lithium ion battery as described in claim 1, which is characterized in that first material granule is to select from phosphorus
Sour lithium iron, lithium nickel cobalt, lithium nickel cobalt manganese, cobalt acid lithium, lithium nickelate, LiMn2O4, and combinations thereof the group that is formed.
4. the positive electrode of lithium ion battery as described in claim 1, which is characterized in that the active material particle is first by a stone
Black alkene is coated on the surface of first material granule, then by one there is the temperature between 50 DEG C to 300 DEG C to carry out
It toasts and is made.
5. the positive electrode of lithium ion battery as described in claim 1, which is characterized in that the graphene shell is completely coated with this
The surface of first material granule.
6. the positive electrode of lithium ion battery as described in claim 1, which is characterized in that the material of first current collector be aluminium,
Copper, iron, nickel, platinum, tungsten, molybdenum, tantalum, niobium, vanadium, chromium, titanium, zirconium, and combinations thereof the group that is formed.
7. the positive electrode of lithium ion battery as described in claim 1, which is characterized in that the active material particle overlies one another simultaneously
Contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710059693.5A CN108346801B (en) | 2017-01-24 | 2017-01-24 | Positive electrode of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710059693.5A CN108346801B (en) | 2017-01-24 | 2017-01-24 | Positive electrode of lithium ion battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108346801A true CN108346801A (en) | 2018-07-31 |
| CN108346801B CN108346801B (en) | 2020-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710059693.5A Active CN108346801B (en) | 2017-01-24 | 2017-01-24 | Positive electrode of lithium ion battery |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545528A (en) * | 2012-07-13 | 2014-01-29 | 清华大学 | Lithium ion battery |
| CN103545555A (en) * | 2012-07-13 | 2014-01-29 | 清华大学 | Preparation method of lithium ion battery |
| CN103545556A (en) * | 2012-07-13 | 2014-01-29 | 清华大学 | Preparation method of film lithium ion battery |
| CN103663435A (en) * | 2012-09-12 | 2014-03-26 | 铼钻科技股份有限公司 | Graphene reinforced composite material |
| CN104868106A (en) * | 2015-04-21 | 2015-08-26 | 常州第六元素材料科技股份有限公司 | Method for coating graphite anode material of lithium ion battery with graphene and application thereof |
| CN105226249A (en) * | 2015-09-11 | 2016-01-06 | 王晓亮 | A kind of 3 SiC 2/graphite alkene core-shell material and Synthesis and applications thereof with gap |
| CN105576197A (en) * | 2014-10-29 | 2016-05-11 | Oci有限公司 | Device for producing polymer dispersion solution of core-shell structured silicon nanoparticles |
| CN106058148A (en) * | 2015-04-17 | 2016-10-26 | 现代自动车株式会社 | Positive electrode for lithium ion battery and lithium ion battery using same |
| CN107293702A (en) * | 2016-04-11 | 2017-10-24 | 创奕能源科技股份有限公司 | The preparation method and lithium battery of high power lithium battery positive electrode |
-
2017
- 2017-01-24 CN CN201710059693.5A patent/CN108346801B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545528A (en) * | 2012-07-13 | 2014-01-29 | 清华大学 | Lithium ion battery |
| CN103545555A (en) * | 2012-07-13 | 2014-01-29 | 清华大学 | Preparation method of lithium ion battery |
| CN103545556A (en) * | 2012-07-13 | 2014-01-29 | 清华大学 | Preparation method of film lithium ion battery |
| CN103663435A (en) * | 2012-09-12 | 2014-03-26 | 铼钻科技股份有限公司 | Graphene reinforced composite material |
| CN105576197A (en) * | 2014-10-29 | 2016-05-11 | Oci有限公司 | Device for producing polymer dispersion solution of core-shell structured silicon nanoparticles |
| CN106058148A (en) * | 2015-04-17 | 2016-10-26 | 现代自动车株式会社 | Positive electrode for lithium ion battery and lithium ion battery using same |
| CN104868106A (en) * | 2015-04-21 | 2015-08-26 | 常州第六元素材料科技股份有限公司 | Method for coating graphite anode material of lithium ion battery with graphene and application thereof |
| CN105226249A (en) * | 2015-09-11 | 2016-01-06 | 王晓亮 | A kind of 3 SiC 2/graphite alkene core-shell material and Synthesis and applications thereof with gap |
| CN107293702A (en) * | 2016-04-11 | 2017-10-24 | 创奕能源科技股份有限公司 | The preparation method and lithium battery of high power lithium battery positive electrode |
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| Publication number | Publication date |
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| CN108346801B (en) | 2020-07-17 |
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