CN108682894A - A kind of lithium ion battery manufacture craft - Google Patents
A kind of lithium ion battery manufacture craft Download PDFInfo
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- CN108682894A CN108682894A CN201810449432.9A CN201810449432A CN108682894A CN 108682894 A CN108682894 A CN 108682894A CN 201810449432 A CN201810449432 A CN 201810449432A CN 108682894 A CN108682894 A CN 108682894A
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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
- H01M10/058—Construction or manufacture
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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
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
- H01M4/36—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
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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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
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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
- 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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Abstract
The present invention discloses a kind of lithium ion battery manufacture craft, and binder is added in solvent and is disperseed, and forms glue, and conductive agent, phosphate cathode material and rich lithium metal oxide are sequentially added after glue dispersion completely, obtains anode sizing agent；Anode sizing agent is coated on plus plate current-collecting body, anode pole piece is obtained；Dispersant is added in solvent and is disperseed, carbon powder, conductive agent and SBR are sequentially added after being completely dispersed, obtains negative electrode slurry；Negative electrode slurry is coated on negative current collector, cathode pole piece is obtained；Respectively using obtained positive and negative plate as positive and negative anodes, using cellulose paper as diaphragm, using commercial Li-ion battery electrolyte as electrolyte, it is assembled into the power soft-package battery of 5Ah.Present invention benefit lithium is simple for process, need not be transformed to existing producing line and technique, and investment is small, without security risks；Utilization rate, first charge-discharge efficiency and the cycle life that can effectively improve positive electrode using rich lithium metal oxide is added in positive electrode.
Description
Technical field
The present invention relates to field of lithium ion battery more particularly to a kind of positive electrodes and lithium-ion electric containing additive
Pond.
Background technology
In traditional energy development, lithium ion battery is as chargeable main energy sources device, in past energy development
In have important role.With the continuous development of the level of information technology, the new energy constantly floods the market therewith, and to lithium
Energy density, service life of ion battery etc., more stringent requirements are proposed.
At present the commercialized positive electrode of mainstream have LiMn2O4, cobalt acid lithium, with nickel or manganese substitution cobalt acid lithium in part cobalt and
The two-spot or ternary material of formation.Its material of LiMn2O4 itself is not too much stablized, and cycle life decaying is very fast, is easy to happen drum
Swollen, high-temperature behavior is poor, the service life is relatively short；Cobalt acid lithium high rate performance is excellent, but safety is poor, expensive；Ternary material
It is higher than energy, it is moderate, but cycle life is insufficient, security performance is limited；Integral new-energy passenger is manned more, once occur
Safety accident tends to cause the harm than passenger car bigger.And power battery is considered as influencing new-energy automobile safety
The principal element of energy, this is directly related to the development of battery industry, and influences national policy and the guiding of public opinion, with other materials
Material is compared to LiFePO4For the phosphate-based material of the olivine structural of representative, due to its safety more higher than ternary material,
Although energy density is based on China's ferric phosphate not as good as ternary material in passenger car field of the safety as overriding concern problem
Under lithium battery industrialization, the higher background of technical maturity, it is higher that pure power passenger car field is also intended to safety in utilization
Ferric phosphate lithium cell.
Current commercialized negative electrode of lithium ion battery mainly uses graphite type material, positive electrode, negative material capacity
Matching is one of the key parameter in lithium ion battery design process, directly affects the cycle life of lithium ion battery.It is usually negative
The design capacity of pole material is higher 5-10% than the design capacity of positive electrode, this is because during chemical conversion, cathode interface
The SEI films of lithiumation object can be formed, while the lithium for being partially submerged into cathode cannot deviate to participate in the normal charge and discharge of lithium ion battery again
Cycle, since negative electrode of lithium ion battery graphite is free from lithium in the initial state, the source of lithium is only positive material
Material, since the active lithium of about 7-10% can be lost in the formation of SEI films, the loss of lithium can lead to battery capacity reduction, coulombic efficiency
It reduces, cycle performance is deteriorated.With the continuous improvement of lithium ion battery energy density, introduces new lithium source and pre- lithium is carried out to battery
Change, improve the first charge discharge efficiency of battery, improve cycle performance, mending the application of lithium technique just seems particularly urgent.
Prelithiation technology mainly has cathode spraying lithium powder method, diaphragm plating lithium method and anode to mend lithium method at present.Wherein, cathode sprays
It applies lithium powder method and diaphragm plating lithium method is very strict to working condition requirement, lithium metal is easily oxidized burning, and is not easy
The amount of lithium is mended in control, this just needs to be transformed production line, purchases expensive benefit lithium equipment, while in order to ensure to mend lithium effect
Fruit also needs to be adjusted existing production technology.Lithium technique is mended compared to highly difficult, high investment cathode, anode mends lithium just
Honesty seem mostly, the technique that typical anode mends lithium is to add a small amount of high power capacity thereto during anode homogenate
Positive electrode, during charging, extra Li elements are deviate from from these high power capacity positive electrodes, are embedded into cathode and supplement
The irreversible capacity of first charge-discharge.In contrast, anode benefit lithium is simple for process, need not be carried out to existing producing line and technique
Transformation, investment is small, without security risks.
Invention content
In view of the above-mentioned problems, the technical problem to be solved by the present invention is to provide one kind do not change existing battery preparation technique and
Under the premise of increasing new equipment, use polyanionic phosphate material and rich lithium metal oxide for positive active material,
Graphite type material is that cathode makes lithium ion battery, improves the first charge discharge efficiency of battery, improves the cycle performance of battery.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of lithium ion battery manufacture craft, including following specific steps：
(1) preparation of anode sizing agent：As a positive electrode active material by positive electrode active materials and rich lithium metal oxide, with it is viscous
Knot agent, conductive agent weigh by a certain percentage, and then binder is added in solvent and disperses, forms glue, wait for that glue disperses
Conductive agent, phosphate cathode material and rich lithium metal oxide are sequentially added after completely, are controlled the viscosity and solid content of slurry, are obtained
To anode sizing agent；
(2) preparation of anode pole piece：Step (1) described anode sizing agent is coated on plus plate current-collecting body, it will using roll squeezer
Composite electrode is compacted, and anode pole piece is obtained after punching；
(3) preparation of negative electrode slurry：Carbon powder, conductive agent, dispersant and SBR are weighed by a certain percentage, then will be divided
Powder, which is added in solvent, to be disperseed, and carbon powder, conductive agent and SBR are sequentially added after being completely dispersed, controls the viscosity of slurry
And solid content, obtain negative electrode slurry；
(4) preparation of cathode pole piece：Step (3) described negative electrode slurry is coated on negative current collector, it will using roll squeezer
Composite electrode is compacted, and cathode pole piece is obtained after punching；
(5) pole piece for respectively obtaining step (2) and (4) is as positive and negative anodes, using cellulose paper as diaphragm, to be commercialized lithium
Ion battery electrolyte is electrolyte, is assembled into the power soft-package battery of 5Ah.After the battery is carried out chemical conversion treatment, to it
Carry out multiplying power and cycle life test.
Positive active material can be the compound for having chemical formula 1 to indicate：
LiFeaMnbMcPO4 [1]
In above-mentioned chemical formula [1], a+b+c=1,0≤a≤1,0≤b≤1,0≤c≤1, M Al, Zn, Mg, Ga, Ti,
At least one of Gr, Co.
Rich lithium metal oxide in the step (1) is Li5FeO4, LiFe5O8, LiFeO2, Li2MoO3, Li6CoO4,
Li6MnO4, Li2ZrO3, Li6Zr2O7, Li8SiO6, Li4SiO4, Li2SiO3, Li5AlO4, Li2CuO2, Li4TiO4, Li3FeN2,
Li7MnN4In one or several kinds；Preferred richness oxidate for lithium is oxide containing Fe, more preferably Li5FeO4.Work as use
Li6MnO4When, Li6MnO4Electrochemical properties with the substantially less than oxide containing Fe, therefore desired effects will not be obtained；When making
Use Li6CoO4When, Li6CoO4Being decomposed in charging process has CoO generations, CoO to be dissolved as Co in the electrolyte2+And it is analysed in cathode
Go out Co to meeting deterioration.
Conductive agent in the step (1) is acetylene black or Ketjen black；
Binder in the step (1) is Kynoar, polytetrafluoroethylene (PTFE), polyvinylpyrrolidone, polypropylene, gathers
The one or more of ethylene, polyurethane, polyamide, polyamidoimide；
Solvent in the step (1) is N-Methyl pyrrolidone, N,N-dimethylformamide, N, N- diethyl formyls
One or more of amine, dimethyl sulfoxide (DMSO), tetrahydrofuran, acetone；
Positive active material in the step (1), rich oxidate for lithium, conductive agent, binder mass ratio be 94-85:1-
15:3-4:2-3；
The solid content of slurry is 50-60% in the step (1), and the viscosity of slurry is 7500-9500cps；
Plus plate current-collecting body in the step (2) is aluminium foil；
Carbon powder in the step (3) is natural graphite, artificial graphite；
Conductive agent in the step (3) is one or more of acetylene black, carbon black, graphite；
Dispersant in the step (3) be carboxymethyl cellulose, carboxylic propyl methocel, methylcellulose or they
One or more of alkali metal salt.Alkali metal can be Na, K, Li.
Carbon powder in the step (3), conductive agent, dispersant, SBR mass ratio be 95.8-94.5:1-1.5:1.2-
1.5:2.0-2.5；
The solid content of slurry is 40-50% in the step (3), and the viscosity of slurry is 2500-3500cps；
Negative current collector in the step (4) is copper foil；
Cellulose paper diaphragm in the step (5) is polyethylene, polypropylene or is made of polyolefin porous thin
It single adult of film, laminated body and appeals the stretched PTFE film of resin compound or is by cellulose, polyester and polypropylene
At least one constituent material constitute fabric nonwoven cloth；
Electrolyte in the step (5) is without the lithium-ion battery electrolytes that particular/special requirement is normal commercial；
Formation process is to charge to 3.5V, steady pressure treatment 12-24h with 0.2C electric currents in the step (5).
Cycle life test carries out constant current or constant-voltage charge for charging for the first time using 0.2-0.5C in the step (5),
Blanking voltage is 3.95V, and electric discharge for the first time carries out constant-current discharge, blanking voltage 2.5V using 1-5C, and second of charging uses
1-5C carries out constant current or constant-voltage charge, blanking voltage 3.65V, and second of electric discharge carries out constant-current discharge, cut-off electricity using 1-5C
Pressure is 2.5V.Low current is used when initial charge, and the lithium in material can be made completely out.
The present invention solves the basic principle of technical problem：Lithium ion battery is during first charge-discharge, positive electrode
In a part of lithium participate in the form SEI films in negative terminal surface, and be converted to the irreversible lithium for being no longer participate in discharge and recharge reaction,
It is easy to cause the structure inside positive electrode to destroy, the reduction of battery capacity, the final cycle life for influencing battery.The present invention is logical
It crosses and adds rich lithium metal oxide in positive electrode, can play and compensate the work that irreversible lithium improves positive material utilization ratio
With, and be to decompose and provide lithium during initial charge but be not involved in subsequent charge and discharge process.Such as select Li5FeO4
For rich oxidate for lithium when, Li5FeO4It can be decomposed in 3.7V relative to Li and two Li are provided, offer can be decomposed again in 3.9V
Two Li.
Beneficial effects of the present invention：Present invention benefit lithium is simple for process, need not be transformed to existing producing line and technique,
Invest it is small, without security risks；Positive electrode is can effectively improve using rich lithium metal oxide is added in positive electrode
Utilization rate, first charge-discharge efficiency and cycle life.
Description of the drawings
In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the drawings.
Fig. 1 is the embodiment of the present invention 1 and comparative example 1LiFePO4-Li5FeO4The cycle performance figure of combination electrode.
Specific implementation mode
To facilitate the understanding of the present invention, the present invention is made comprehensively, meticulously to describe below in conjunction with preferred embodiment, but
Protection scope of the present invention is not limited to following specific examples.
Embodiment 1
By LiFePO4And Li5FeO4It is 90 in mass ratio with acetylene black, Kynoar for positive active material:5:3:2
It weighs.Then Kynoar (PVDF) is added in N-Methyl pyrrolidone (NMP) and is disperseed, after dispersion completely successively
Acetylene black, LiFePO is added4And Li5FeO4, stir evenly, add nmp solvent, the solid content for controlling slurry is 56%, slurry
Viscosity is 8500 ± 500cps；Slurry is crossed after 150 mesh mesh screens and carries out applicator roll pressure and cut to be satisfactory positive plate；
Graphite powder and SPC65, CMC, SBR are closed by cathode blending requirement and starched, 46%, viscosity control exists for solid content control
3000±500cps；Then slurry is crossed after 120 mesh mesh screens and carries out applicator roll pressure and cut to be satisfactory negative plate；
Assembly process will be gone to after the positive/negative plate soldering polar ear made, lamination is assembled into together with isolation film
Core fluid injection and the soft-package battery for being encapsulated as 5Ah；3.65V is charged to 0.2C, after static 12 hours, 1C, 2C, 5C are carried out to it
Multiplying power and the test of 2C cycle performances.
Embodiment 2
In addition to by LiFePO4And Li6CoO4It is 91 in mass ratio with acetylene black, Kynoar for positive active material:
4:3:2 weigh.Remaining is same as Example 1.
Embodiment 3
In addition to by LiMnPO4And Li5FeO4It is 87 in mass ratio with acetylene black, Kynoar for positive active material:
8:3:2 weigh.Remaining is same as Example 1.
Embodiment 4
In addition to by LiFePO4、Li5FeO4, acetylene black, Kynoar in mass ratio be 85:10:3:2 weigh.Remaining with
Embodiment 1 is identical.
Comparative example 1
In addition to by LiFePO4It is 95 in mass ratio with acetylene black, Kynoar for positive active material:3:2 weigh.
Remaining is same as Example 1.The cycle performance of embodiment 1 and comparative example 1LiFePO4-Li5FeO4 combination electrodes is as shown in Figure 1.
Embodiment 1-4 and comparative example 1 are after performance comparison, conclusion such as the following table 1：
The chemical property comparison of sample is prepared in 1 each implementation column of table
Above content is only citing made for the present invention and explanation, affiliated those skilled in the art are to being retouched
The specific embodiment stated does various modifications or additions or substitutes by a similar method, without departing from invention or surpasses
More range defined in the claims, is within the scope of protection of the invention.
Claims (10)
1. a kind of lithium ion battery manufacture craft, which is characterized in that including following specific steps：
(1) preparation of anode sizing agent：As a positive electrode active material by phosphate cathode material and rich lithium metal oxide, with bonding
Agent, conductive agent weigh by a certain percentage, and then binder is added in solvent and disperses, forms glue, waits for that glue has disperseed
Conductive agent, phosphate cathode material and rich lithium metal oxide are sequentially added after complete, obtain anode sizing agent；
(2) preparation of anode pole piece：Step (1) described anode sizing agent is coated on plus plate current-collecting body, it will be compound using roll squeezer
Material electrodes are compacted, and anode pole piece is obtained after punching；
(3) preparation of negative electrode slurry：Carbon powder, conductive agent, dispersant and SBR are weighed by a certain percentage, then by dispersant
It is added in solvent and is disperseed, carbon powder, conductive agent and SBR are sequentially added after being completely dispersed, obtains negative electrode slurry；
(4) preparation of cathode pole piece：Step (3) described negative electrode slurry is coated on negative current collector, it will be compound using roll squeezer
Material electrodes are compacted, and cathode pole piece is obtained after punching；
(5) pole piece for respectively obtaining step (2) and (4) is as positive and negative anodes, using cellulose paper as diaphragm, with commercial Li-ion
Battery electrolyte is electrolyte, is assembled into the power soft-package battery of 5Ah.
2. a kind of lithium ion battery manufacture craft according to claim 1, which is characterized in that the positive active material is
There is the compound that chemical formula [1] indicates：
LiFeaMnbMcPO4[1]
In above-mentioned chemical formula [1], a+b+c=1,0≤a≤1,0≤b≤1,0≤c≤1, M Al, Zn, Mg, Ga, Ti, Gr,
At least one of Co.
3. a kind of lithium ion battery manufacture craft according to claim 1, which is characterized in that the richness in the step (1)
Lithium metal oxide is Li5FeO4, LiFe5O8, LiFeO2, Li2MoO3, Li6CoO4, Li6MnO4, Li2ZrO3, Li6Zr2O7,
Li8SiO6, Li4SiO4, Li2SiO3, Li5AlO4, Li2CuO2, Li4TiO4, Li3FeN2, Li7MnN4In one or several kinds；It is excellent
The rich oxidate for lithium of choosing is oxide containing Fe, more preferably Li5FeO4。
4. a kind of lithium ion battery manufacture craft according to claim 1, which is characterized in that in the step (1)
Conductive agent be acetylene black or Ketjen black；
Binder in the step (1) is Kynoar, polytetrafluoroethylene (PTFE), polyvinylpyrrolidone, polypropylene, poly- second
The one or more of alkene, polyurethane, polyamide, polyamidoimide；
Solvent in the step (1) is N-Methyl pyrrolidone, N,N-dimethylformamide, N, N- diethylformamides, two
One or more of methyl sulfoxide, tetrahydrofuran, acetone；
Positive active material in the step (1), rich oxidate for lithium, conductive agent, binder mass ratio be 94-85:1-15:3-
4:2-3；
The solid content of slurry is 50-60% in the step (1), and the viscosity of slurry is 7500-9500cps.
5. a kind of lithium ion battery manufacture craft according to claim 1, which is characterized in that in the step (2) just
Pole collector is aluminium foil.
6. a kind of lithium ion battery manufacture craft according to claim 1, which is characterized in that the carbon in the step (3)
Plain powder is natural graphite, artificial graphite；
Conductive agent in the step (3) is one or more of acetylene black, carbon black, graphite；
Dispersant in the step (3) is carboxymethyl cellulose, carboxylic propyl methocel, methylcellulose or their alkali
One or more of metal salt；Alkali metal is Na, K, Li；
Carbon powder in the step (3), conductive agent, dispersant, SBR mass ratio be 95.8-94.5:1-1.5:1.2-1.5:
2.0-2.5；
The solid content of slurry is 40-50% in the step (3), and the viscosity of slurry is 2500-3500cps.
7. a kind of lithium ion battery manufacture craft according to claim 1, which is characterized in that negative in the step (4)
Pole collector is copper foil.
8. a kind of lithium ion battery manufacture craft according to claim 1, which is characterized in that the fibre in the step (5)
The plain paper diaphragm of dimension is single adult, laminated body and the appeal of polyethylene, polypropylene or the porous membrane being made of polyolefin
The stretched PTFE film of resin compound or by being constituted selected from least one of cellulose, polyester and polypropylene constituent material
Fabric nonwoven cloth；
Electrolyte in the step (5) is lithium-ion battery electrolytes.
9. a kind of lithium ion battery manufacture craft according to claim 1, which is characterized in that further include in step (5) by
After the battery carries out chemical conversion treatment, multiplying power and cycle life testing procedure are carried out to it；Wherein formation process is with 0.2C electricity
Current charge is to 3.5V, steady pressure treatment 12-24h.
10. a kind of lithium ion battery manufacture craft according to claim 9, which is characterized in that cycle in the step (5)
Life test is that charging for the first time carries out constant current or constant-voltage charge using 0.2-0.5C, and blanking voltage 3.95V discharges for the first time
Constant-current discharge, blanking voltage 2.5V are carried out using 1-5C, second of charging carries out constant current or constant-voltage charge, cut-off using 1-5C
Voltage is 3.65V, and second of electric discharge carries out constant-current discharge, blanking voltage 2.5V using 1-5C.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109546226A (en) * | 2018-10-31 | 2019-03-29 | 湖南格兰博智能科技有限责任公司 | Negative electrode of lithium ion battery prelithiation method and lithium ion battery |
| CN113471413A (en) * | 2020-03-31 | 2021-10-01 | 北京卫蓝新能源科技有限公司 | Composite lithium supplement slurry, preparation method and application |
| CN113735192A (en) * | 2021-01-05 | 2021-12-03 | 厦门厦钨新能源材料股份有限公司 | Lithium ion battery with low capacity loss |
| CN114284567A (en) * | 2021-12-29 | 2022-04-05 | 中南大学 | Preparation method of high-energy-density cathode-free lithium metal battery |
| CN114335428A (en) * | 2021-12-30 | 2022-04-12 | 重庆冠宇电池有限公司 | Positive plate, preparation method and battery |
| CN114551889A (en) * | 2022-04-26 | 2022-05-27 | 深圳一特科技有限公司 | Dispersing agent for lithium ion battery anode slurry and preparation method and application thereof |
| WO2022133926A1 (en) * | 2020-12-24 | 2022-06-30 | 宁德时代新能源科技股份有限公司 | Lithium-ion secondary battery and preparation method therefor, battery module, battery pack, and device |
| WO2023097467A1 (en) * | 2021-11-30 | 2023-06-08 | 宁德时代新能源科技股份有限公司 | Positive electrode slurry composition and positive electrode sheet comprising same, secondary battery, battery module, battery pack, and power consumption device |
| WO2023108961A1 (en) * | 2021-12-16 | 2023-06-22 | 蜂巢能源科技股份有限公司 | Lithium iron phosphate composite material, and preparation method therefor and use thereof |
| WO2024012481A1 (en) * | 2022-07-13 | 2024-01-18 | 深圳市德方创域新能源科技有限公司 | Iron-based lithium supplementing material for positive electrode, and preparation method therefor and use thereof |
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| CN115803932A (en) * | 2020-12-24 | 2023-03-14 | 宁德时代新能源科技股份有限公司 | Lithium ion secondary battery, preparation method thereof, battery module, battery pack and device |
| CN113735192A (en) * | 2021-01-05 | 2021-12-03 | 厦门厦钨新能源材料股份有限公司 | Lithium ion battery with low capacity loss |
| WO2023097467A1 (en) * | 2021-11-30 | 2023-06-08 | 宁德时代新能源科技股份有限公司 | Positive electrode slurry composition and positive electrode sheet comprising same, secondary battery, battery module, battery pack, and power consumption device |
| WO2023108961A1 (en) * | 2021-12-16 | 2023-06-22 | 蜂巢能源科技股份有限公司 | Lithium iron phosphate composite material, and preparation method therefor and use thereof |
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| CN114335428B (en) * | 2021-12-30 | 2024-01-30 | 重庆冠宇电池有限公司 | Positive plate, preparation method and battery |
| CN114551889A (en) * | 2022-04-26 | 2022-05-27 | 深圳一特科技有限公司 | Dispersing agent for lithium ion battery anode slurry and preparation method and application thereof |
| WO2024012481A1 (en) * | 2022-07-13 | 2024-01-18 | 深圳市德方创域新能源科技有限公司 | Iron-based lithium supplementing material for positive electrode, and preparation method therefor and use thereof |
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