CN108448161A - Ultralow temperature lithium battery - Google Patents
Ultralow temperature lithium battery Download PDFInfo
- Publication number
- CN108448161A CN108448161A CN201810255453.7A CN201810255453A CN108448161A CN 108448161 A CN108448161 A CN 108448161A CN 201810255453 A CN201810255453 A CN 201810255453A CN 108448161 A CN108448161 A CN 108448161A
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- Prior art keywords
- lithium battery
- ultralow temperature
- temperature lithium
- present
- positive electrode
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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
- 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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0569—Liquid materials characterised by the solvents
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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- 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)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention discloses a kind of ultralow temperature lithium battery, including positive electrode and negative material, and the coat of the positive electrode includes following weight percent composition：94 96% positive active materials, 0.8 1.5% the first conductive agent, 2.2 3.5% the second conductive agent and surplus bonding agents；The grain size of the negative material is 4.3 16.7 μm, interlamellar spacing is 0.3354 0.37nm.Ultralow temperature lithium battery of the present invention is adaptable, can be used under 50 70 DEG C of environment, can especially be discharged with 1.2C discharge currents at 55 DEG C and discharge capacity reaches 55% or more of nominal capacity；Meanwhile the ultralow temperature lithium battery service life is long, environment friendly and pollution-free.
Description
Technical field
The present invention relates to technical field of lithium batteries, and in particular to a kind of ultralow temperature lithium battery.
Background technology
Since lithium ion battery is commercialized, lithium ion battery obtains relatively broad application in more and more fields,
The upsurge of lithium ion battery development and production has been started in world wide.Currently, lithium ion battery is in laptop, movement
It is widely used in the consumer digitals product such as phone, video camera, camera, and in boat residence, space flight, navigation, small medical
And the fields such as military communication apparatus gradually replace conventional batteries, extensive demand to propose higher to the performance of lithium ion battery
Requirement.
Currently, in Military Application, a factor for restricting lithium ion battery development is exactly its environmental characteristic, especially
Its cryogenic property.Many military equipments such as missile power supply requires that its power supply can work at -40 DEG C, and lithium-ion electric
The cryogenic property in pond wants poor more than room temperature, therefore the cryogenic property for how improving lithium ion battery is lithium ion battery use scope
One of important directions of expansion.In some special dimensions, such as space flight and aviation, deep-sea submariner equipment power supply, polar region scientific investigation, exploration
- 50 DEG C of even lower temperature environments of needs such as equipment is powered, frigid zone is speedily carried out rescue work, disaster relief power supply, insulated cold wear, warm-proof shoes power supply
Lower work is a severe test for performance of lithium ion battery.
Currently, universal low temperature battery cannot discharge under -55 DEG C of environment in the market, and the electricity that discharges under -50 DEG C of environment
Stream can only achieve 0.2-0.3C, and discharge capacity also can only achieve 30% or so.In view of this, invention one kind is at -50 DEG C and puts
Electric current, which is more than the lithium battery of 1C, becomes technical problem urgently to be resolved hurrily at this stage.
Invention content
It is an object of the invention to overcome above-mentioned technical deficiency, provide it is a kind of can under -55 DEG C of environment 1.2C discharge it is super
Low temperature lithium battery.
To reach above-mentioned technical purpose, technical scheme of the present invention provides a kind of ultralow temperature lithium battery, including positive electrode
And negative material, the coat of the positive electrode includes following weight percent composition：94-96% positive active materials,
The first conductive agents of 0.8-1.5%, the second conductive agents of 2.2-3.5% and surplus bonding agent；The grain size of the negative material is
4.3-16.7 μm, interlamellar spacing 0.3354-0.37nm.
Compared with prior art, ultralow temperature lithium battery of the present invention is adaptable, can be used under -50-70 DEG C of environment, especially
It is can to reach 55% or more of nominal capacity at -55 DEG C with the electric discharge of 1.2C discharge currents and discharge capacity；Meanwhile this is super
Low temperature lithium battery service life is long, environment friendly and pollution-free.
Description of the drawings
Fig. 1 is discharge curve of the ultralow temperature lithium battery of the present invention at -55 DEG C.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments,
The present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
The present invention provides a kind of ultralow temperature lithium batteries, by positive electrode, negative material, electrolyte, diaphragm plastic-aluminum
The part such as film, lug is constituted, and the routine side of existing lithium battery can be used in the physical arrangement of the ultralow temperature lithium battery of the present embodiment
Conventional side can be used in the position of formula, i.e. positive electrode, negative material, electrolyte, diaphragm aluminum plastic film, lug etc. and connection relation
Formula.
Positive electrode described in the present embodiment can by positive plate and the coat coated on positive plate surface is constituted, and in order to
The low-temperature characteristics for improving ultralow temperature lithium battery, can set coat to by positive active material, two kinds of conductive agents and bonding agent
Positive plate surface is coated on after stirring evenly, the coated face density on positive plate is 26-30mg/cm2；And in order to improve anode
The conductivity of material, the present embodiment coat include following weight percent composition：94-96% positive active materials, 0.8-
1.5% the first conductive agent, the second conductive agents of 2.2-3.5% and surplus bonding agents；Preferably, 95.7% positive active material,
1% the first conductive agents, the 2.5% the second conductive agent, 0.8% bonding agents.Nickle cobalt lithium manganate can be used in above-mentioned positive active material,
Conventional conductive agent can be used in the first conductive agent and the second conductive agent in two kinds of conductive agents, as long as two kinds of conductive agent types
Difference, and conventional adhesive substance then can be used in bonding agent.
Bonding agent is generally divided into three kinds, and it is linear that one kind, which is dotted, another, and the present embodiment is preferably using linear bonding
Agent, charging and discharging lithium battery not will produce failure in the process, to extend the charge and discharge cycles number of lithium battery.
Wherein, in order to further improve the low-temperature characteristics of ultralow temperature lithium battery, positive active material described in the present embodiment
Grain size be 2.4-3.9 μm, by controlling the grain size of positive active material, and make it in the coating function of two kinds of conductive agents
Under, and then improve the conductivity of positive plate；The resistivity of the positive plate is 900-1200 Ω m, the faces AB axial length is 0.3-0.6 μ
M, the faces the AB axial length by controlling positive plate are conducive to improve battery high rate performance to increase lithium ion mobility channel.And
By the way that the resistivity of the grain size of positive active material, positive plate and the faces AB axial length are adjusted so that the ion of positive electrode moves
It moves path to shorten, and then improves low temperature performance.
Graphite, such as natural graphite, artificial graphite can be used in the present embodiment negative material, and in order to reduce negative material
Ontology impedance and ion migration impedance, the grain size of negative material described in the present embodiment is 4.3-16.7 μm, interlamellar spacing is
0.3354-0.37nm.Wherein, when grain size is 7.3 ± 0.2 μm and interlamellar spacing is 0.35-0.36nm, the ontology of negative material
Impedance and Ion transfer impedance are minimum, and low temperature charging performance can reach maximization.
And for electrolyte, it since electrolyte is at -30 DEG C or less, can freeze, viscosity increases, and then performance is caused to be disliked
Change, when temperature reduces, the ontology impedance variations of electrolyte only account for the increased small part of battery impedance, are increased by solvent viscosity
The interface compatibility variation brought greatly is only the main reason for battery impedance increases, therefore electrolyte described in the present embodiment includes molten
Agent, lithium salts and additive, the solvent include at least one of PC and EA, by be added low melting point, low viscosity it is linear
Carboxylate (EA) and/or propene carbonate (PC), can slow down liquid phase process variation degree when electrolyte is reduced with temperature,
Improve the low temperature performance of lithium ion battery.
And in order to ensure the ultralow temperature lithium battery of the present embodiment under -55 DEG C of environment its be electrolysed fluid viscosity and will not obviously increase
Greatly, it is 1 that solvent described in the present embodiment, which further includes volume,:1:1 EC, DMC and EMC, wherein EC are ethylene carbonate, DMC is carbon
Dimethyl phthalate, EMC be methyl ethyl ester, in order to ensure be electrolysed fluid viscosity low temperature, solvent can by PC, EA, EC,
DMC and EMC is constituted, and EC, DMC and EMC volume ratio therein is 1:1:1.
The lithium salts in the present embodiment electrolyte is lithium hexafluoro phosphate (LiPF6), and lithium hexafluoro phosphate in electrolyte
A concentration of 1.2mol/L is made up of so that electrolyte has best low temperature the concentration and solvent that control lithium hexafluoro phosphate
Conductivity and electrode/electrolyte interface impedance, specially low-temperature conductivity and reach 3.2mS/cm, by itself and above-mentioned positive material
The degree of polarization of material and the lithium battery of negative material assembling at low temperature is minimum, discharge platform is steady.
And on the basis of above-mentioned electrolyte, using fluorinated ethylene carbonate (FEC) and/or difluorine oxalic acid boracic acid lithium
(LIODFB) it is used as additive, can further improve the cryogenic property of lithium battery.
Test proves that ultralow temperature lithium battery manufactured in the present embodiment can recycle under -55~70 DEG C of environment,
And 55% of nominal capacity or more can be can reach with the discharge current continuous discharge of 1.2C, discharge capacity at -55 DEG C.
As shown in Figure 1, its can discharge curve of the single battery manufactured in the present embodiment at -55 DEG C, in electric discharge in 35 seconds 29 minutes
Cheng Zhong, discharge voltage 2.5V are increased to after 3V and are gradually decrease to 2V, and discharge current is then the lasting inconvenience of 1.2C, by it
Discharge curve is it is found that ultralow temperature lithium battery manufactured in the present embodiment has fabulous cryogenic property.
The ultralow temperature lithium battery of the present embodiment is light-weight, and weight is only the 1/5-6 of lead-acid battery under same volume, and
Its service life is long, and testing multigroup lithium battery proves, the monomer cycle-index of the present embodiment is at 800 weeks or more.
Meanwhile the lithium battery of the present embodiment does not contain harmful poisonous heavy metal element and the substances such as mercury, cadmium, lead, therefore in life
In production, use and scrapping process, above-mentioned heavy metal pollution not will produce.
The specific implementation mode of present invention described above, is not intended to limit the scope of the present invention..Any basis
The various other corresponding changes and deformation that the technical concept of the present invention is made, should be included in the claims in the present invention
In protection domain.
Claims (8)
1. a kind of ultralow temperature lithium battery, including positive electrode and negative material, which is characterized in that the coat of the positive electrode
Including following weight percent composition：94-96% positive active materials, the first conductive agents of 0.8-1.5%, 2.2-3.5% second
Conductive agent and surplus bonding agent；The grain size of the negative material is 4.3-16.7 μm, interlamellar spacing 0.3354-0.37nm.
2. ultralow temperature lithium battery as described in claim 1, which is characterized in that the coat includes following weight percent group
Point：95.7% positive active material, the 1% the first conductive agents, the 2.5% the second conductive agent and surplus bonding agents.
3. ultralow temperature lithium battery as described in claim 1, which is characterized in that the grain size of the positive active material is 2.4-
3.9 μm, the resistivity of the positive plate is 900-1200 Ω m, the faces AB axial length is 0.3-0.6 μm.
4. ultralow temperature lithium battery as described in claim 1, which is characterized in that the ultralow temperature lithium battery further includes electrolyte,
The electrolyte includes solvent, lithium salts and additive, and the solvent includes at least one of PC and EA.
5. ultralow temperature lithium battery as claimed in claim 4, which is characterized in that the solvent further includes that volume is 1:1:1 EC,
DMC and EMC.
6. ultralow temperature lithium battery as claimed in claim 5, which is characterized in that the lithium salts is LiPF6, and lithium salts in electrolyte
A concentration of 1.2mol/L.
7. the ultralow temperature lithium battery as described in claim 4-6 is any, which is characterized in that the additive be FEC and/or
LIODFB。
8. ultralow temperature lithium battery as described in claim 1, which is characterized in that the coated face of coat is close on the positive electrode
Degree is 26-30mg/cm2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810255453.7A CN108448161A (en) | 2018-03-25 | 2018-03-25 | Ultralow temperature lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810255453.7A CN108448161A (en) | 2018-03-25 | 2018-03-25 | Ultralow temperature lithium battery |
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| Publication Number | Publication Date |
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| CN108448161A true CN108448161A (en) | 2018-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810255453.7A Pending CN108448161A (en) | 2018-03-25 | 2018-03-25 | Ultralow temperature lithium battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117317188A (en) * | 2023-10-30 | 2023-12-29 | 湖北美赛尔科技有限公司 | Low-temperature-resistant lithium ion battery containing active carbon negative electrode material and preparation method thereof |
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| CN101916857A (en) * | 2010-08-19 | 2010-12-15 | 深圳市贝特瑞新能源材料股份有限公司 | Composite cathode material for lithium ion power and energy storage battery and preparation method thereof and battery |
| CN103427084A (en) * | 2013-09-05 | 2013-12-04 | 深圳市宜加新能源科技有限公司 | Positive electrode sizing agent of ultralow-temperature lithium battery and ultralow-temperature lithium battery |
| CN105390695A (en) * | 2015-12-01 | 2016-03-09 | *** | Graphene ultralow-temperature power lithium battery |
| CN106299291A (en) * | 2016-09-09 | 2017-01-04 | 深圳市沃特玛电池有限公司 | A kind of ultralow temperature lithium iron phosphate dynamic battery and preparation method thereof |
-
2018
- 2018-03-25 CN CN201810255453.7A patent/CN108448161A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916857A (en) * | 2010-08-19 | 2010-12-15 | 深圳市贝特瑞新能源材料股份有限公司 | Composite cathode material for lithium ion power and energy storage battery and preparation method thereof and battery |
| CN103427084A (en) * | 2013-09-05 | 2013-12-04 | 深圳市宜加新能源科技有限公司 | Positive electrode sizing agent of ultralow-temperature lithium battery and ultralow-temperature lithium battery |
| CN105390695A (en) * | 2015-12-01 | 2016-03-09 | *** | Graphene ultralow-temperature power lithium battery |
| CN106299291A (en) * | 2016-09-09 | 2017-01-04 | 深圳市沃特玛电池有限公司 | A kind of ultralow temperature lithium iron phosphate dynamic battery and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117317188A (en) * | 2023-10-30 | 2023-12-29 | 湖北美赛尔科技有限公司 | Low-temperature-resistant lithium ion battery containing active carbon negative electrode material and preparation method thereof |
| CN117317188B (en) * | 2023-10-30 | 2024-03-22 | 湖北美赛尔科技有限公司 | Low-temperature-resistant lithium ion battery containing active carbon negative electrode material and preparation method thereof |
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Application publication date: 20180824 |