CN107293690A - A kind of lithium ion cell positive composite pole piece and preparation method thereof, lithium ion battery - Google Patents
A kind of lithium ion cell positive composite pole piece and preparation method thereof, lithium ion battery Download PDFInfo
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- CN107293690A CN107293690A CN201710439025.5A CN201710439025A CN107293690A CN 107293690 A CN107293690 A CN 107293690A CN 201710439025 A CN201710439025 A CN 201710439025A CN 107293690 A CN107293690 A CN 107293690A
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The present invention relates to a kind of lithium ion cell positive composite pole piece and preparation method thereof, lithium ion battery, belong to lithium ion battery preparing technical field.The lithium ion cell positive composite pole piece of the present invention, including anode pole piece, the anode pole piece is made up of collector and the positive electrode coating being arranged on collection liquid surface, security coat is provided with the positive electrode coating, the security coat is made up of fire retardant, electroconductive glass fibre, film forming agent, organolithium and binding agent, and fire retardant, electroconductive glass fibre, film forming agent, the mass ratio of organolithium and binding agent are (40~60):(10~30):(10~20):(1~5):(10~20).The lithium ion cell positive composite pole piece of the present invention has good stability, security and imbibition ability；Security performance, cycle performance and the high rate performance of lithium ion battery can be improved.
Description
Technical field
The present invention relates to a kind of lithium ion cell positive composite pole piece and preparation method thereof, lithium ion battery, belong to lithium from
Sub- battery preparation technology field.
Background technology
Lithium ion battery with its energy density it is high, have extended cycle life, advantages of environment protection and be widely used in electronic vapour
The fields such as car, electric tool, energy storage and its digital electric.And anode pole piece is the key component for constituting lithium ion battery, its property
The quality of energy plays a key effect to the energy density of lithium ion battery, high rate performance and its cycle performance.Current positive pole pole
Active material is mainly coated in collection liquid surface by coating technique and is prepared from by piece preparation process, and it has high rate performance
And its defect such as poor safety performance, cycle performance be general, cause the chemical properties such as the safety such as its lithium ion to be difficult to meet current
And its tomorrow requirement.According to lithium ion battery demand, coat a layer function material to improve lithium ion battery in pole piece
Security performance or the chemical property such as cycle performance or multiplying power, the chemical property of lithium ion battery can be improved.Prior art
In, application publication number discloses a kind of anode pole piece and lithium ion battery for CN105810885A Chinese invention patent application,
The anode pole piece includes collector and containing positive electrode active materials and the active material layer that is distributed on the collector, described
Anti-overcharge coating is provided between collector and the active material layer or on the active material layer, to improve lithium ion
The security performance of battery, but anti-overcharge coating contains activator and gas generating agent, although improved in terms of security performance, but
Be due to activator and gas generating agent conductance it is poor, the performances such as the multiplying power of lithium ion battery are adversely affected.To improve
While the security performance of lithium ion battery, the chemical property such as the multiplying power of lithium ion battery and its circulation and it is uninfluenced or
It is improved, it is necessary to develop a kind of functional-coated liquid and prepare positive pole composite pole piece, to improve the comprehensive of lithium ion battery
Close performance.
The content of the invention
It is an object of the invention to provide the good lithium ion cell positive of a kind of security performance, high rate performance, cycle performance
Composite pole piece.
Present invention also offers a kind of preparation method of above-mentioned lithium ion cell positive composite pole piece and one kind using above-mentioned
The lithium ion battery of lithium ion cell positive composite pole piece.
In order to realize the above object the technical scheme that the lithium ion cell positive composite pole piece of the present invention is used is：
A kind of lithium ion cell positive composite pole piece, including anode pole piece, the anode pole piece is by collector and is arranged on
Security coat, the safety are provided with positive electrode coating composition on collection liquid surface, the positive electrode coating
Property coat is made up of fire retardant, electroconductive glass fibre, film forming agent, organolithium and binding agent, fire retardant, electroconductive glass fibre,
The mass ratio of film forming agent, organolithium and binding agent is (40~60):(10~30):(10~20):(1~5):(10~20).
The thickness of the security coat is 1~5 μm.
The security coat is coated on the coating using method of electrostatic spinning.The hole of the security coat
Rate is 5~20%.
A diameter of 5~10 μm of the electroconductive glass fibre, draw ratio is 20~5：5~1.
The fire retardant is aluminum diethylphosphinate, melamine condensed phosphate, melamine, benzoguanamine, three (hydroxyls
Ethyl) isocyanuric acid ester, allantoin, glycoluril, dicyandiamide, guanidine, carbodiimide, one kind in melamine pyrophosphoric ester.
The film forming agent is ethylene carbonate (EC), ethylene sulfite (ES), propylene sulfite (PS), the sub- second of carbonic acid
In alkene ester (VC), dimethyl sulfite (DMS), diethyl sulfite (DES), 1,2- trifluoroacetic acid base ethane (BTE)
It is a kind of.
The organolithium be lithium alkylide, chain alkenyl lithium, alkynyl lithium, aromatic radical lithium, lithium amide, 2- thienyls lithium, three (just
Butyl) one kind in lithium magnesium.
The lithium alkylide is in lithium methide, ethyl-lithium, propyl lithium, butyl lithium, amyl group lithium, hexyl lithium, octyl group lithium, decyl lithium
One kind.
The chain-like alkyl lithium is one kind in vinyl lithium, acrylic lithium.
The lithium amide is lithium diisopropylamine.
The aromatic radical lithium is one kind in phenyl lithium, benzyl lithium.
It is preferred that, the organolithium is one kind in lithium alkylide, alkenyl lithium, alkynyl lithium.
It is preferred that, the organolithium is lithium methide, ethyl-lithium, propyl lithium, n-BuLi, s-butyl lithium, isobutyl group lithium, uncle
Butyl lithium, hexyllithium, n-octyl lithium, positive decyl lithium, vinyl lithium, benzyl lithium, phenyl lithium, 2- thienyls lithium, three (positive fourths
Base) one kind in lithium magnesium.
The binding agent is one kind in Kynoar, polyacrylic acid, polyacrylonitrile, POLYPROPYLENE GLYCOL.
The technical scheme that is used of preparation method of the lithium ion cell positive composite pole piece of the present invention for：
A kind of preparation method of above-mentioned lithium ion cell positive composite pole piece, comprises the following steps：Binding agent, which is dissolved in, to be had
In machine solvent, then add fire retardant and be uniformly dispersed, sequentially add electroconductive glass fibre, film forming agent and organolithium, disperse
Uniformly, security coating liquid is obtained；Security coating liquid is coated in the coating surface of anode pole piece again, at 50~120 DEG C
Dry, produce.
The coating is carried out using the method for electrostatic spinning.
The organic solvent is n-hexane, normal heptane, hexamethylene, hexahydrotoluene, tetrahydrofuran, N- crassitudes
Ketone, diethyl ether, diisopropyl ether, butyl oxide, methyl tertiary butyl ether(MTBE), cycloalkyl methyl ether, dimethoxy-ethane, dioxanes, toluene, two
Toluene, mesitylene, chlorobenzene, DMF, DMI, HPT, three
One kind in ethamine, pyridine.
When binding agent is dissolved in into organic solvent, the ratio of 500ml organic solvents is used according to every 10~20g binding agents
Take binding agent and organic solvent.
The technical scheme that is used of lithium ion battery of the present invention for：One kind uses above-mentioned lithium ion cell positive composite pole
The lithium ion battery of piece.
The lithium ion cell positive composite pole piece of the present invention utilizes the characteristic that electroconductive glass fibre conductance is high, support force is strong
Functional materials formation network structure is improved to the stability and imbibition ability of positive pole composite pole piece；And in electroconductive glass fibre
Contain the materials such as excellent heat dissipation performance, resistant to elevated temperatures silica, aluminum oxide, it is possible to increase the security performance of lithium ion battery；And pacify
Fire retardant in full property coat can further improve the safety of lithium ion battery when lithium ion battery runs into abnormal conditions
Performance.In addition, the organo-lithium compound in security coat improves the transmission rate of lithium ion under the conditions of big multiplying power, its moment
The heat of generation, can quickly be excluded by electroconductive glass fibre, it is to avoid the local temperature of pole piece is too high to cause lithium-ion electric
The cycle performance in pond is deteriorated, simultaneously because it has preferable compatibility with electrolyte, moreover it is possible to further improve the imbibition of pole piece
Ability.
The preparation method of the lithium ion cell positive composite pole piece of the present invention, technique is simple, and energy consumption is low, should suitable for promoting
With.
The lithium ion battery of the present invention, using above-mentioned lithium ion cell positive composite pole piece, with good security performance,
Cycle performance and high rate performance.
Brief description of the drawings
Fig. 1 is the lithium ion battery cyclic curve figure of embodiment 1~3 and comparative example.
Embodiment
Technical scheme is further described below in conjunction with embodiment.
Electroconductive glass fibre employed in embodiment uses application publication number for CN104003621A China
A diameter of 5~10 μm of electroconductive glass fibre made from the production technology of embodiment 1 in application for a patent for invention text, and it is entered
Row cutting obtains the electroconductive glass fibre of certain draw ratio.
Anode slice of lithium ion battery employed in embodiment is prepared in accordance with the following methods：
5g Kynoar is dissolved in 150ml 1-METHYLPYRROLIDONEs, after then addition 5g conductive agents SP is uniformly dispersed, then 90g is added
Ternary material (LiNi0.3Co0.5Mn0.2O2) and be uniformly dispersed by closing pulp grinder and obtain slurry, slurry is applied finally by coating machine
Prepare anode pole piece A or slurry is coated in the one side of the aluminium foil of 15 μ m-thicks and obtain just in the two sides for overlaying on the aluminium foil of 15 μ m-thicks
Pole pole piece B.
Embodiment 1
The lithium ion cell positive composite pole piece of the present embodiment, including anode pole piece A, anode pole piece A is by collector and sets
Put and be provided with peace on coating layer of active substance (the i.e. positive electrode coating) composition on collector two sides, the coating layer of active substance
Full property coat, the security coat is made up of fire retardant, electroconductive glass fibre, film forming agent, organolithium and binding agent, is hindered
The mass ratio for firing agent, electroconductive glass fibre, film forming agent, organolithium and binding agent is 50:20:15:3:15；Fire retardant is diethyl
Phosphinic acids aluminium, film forming agent is ethylene sulfite, and organolithium is lithium methide, and binding agent is Kynoar；Electroconductive glass fibre
A diameter of 5 μm, draw ratio is 10:3；The thickness of security coat is 1 μm, and porosity is 5%.
The preparation method of the lithium ion cell positive composite pole piece of the present embodiment, comprises the following steps：
1) weigh 15g Kynoar to be dissolved in 500ml 1-METHYLPYRROLIDONE, then add 50g diethyl
Phosphinic acids aluminium is simultaneously uniformly dispersed, then addition 20g electroconductive glass fibres, 15g ethylene sulfites and 3g lithium methides successively, disperses equal
It is even, obtain security coating liquid；
2) security coating liquid is coated on to the coating layer of active substance surface of anode pole piece by electrostatic spinning technique, done
Dry, it is 1 μm of lithium ion cell positive composite pole piece to obtain coat thickness.
The lithium ion battery of the present embodiment be the lithium ion cell positive composite pole piece using this implementation as positive plate, with artificial
Graphite is that the pole piece that negative electrode active material is prepared is negative plate, with LiPF6/ EC+DEC (volume ratios 1:1) it is electrolyte,
Celgard2400 films are barrier film, the soft bag lithium ionic cell A1 prepared using conventional sectional method.
Embodiment 2
The lithium ion cell positive composite pole piece of the present embodiment, including anode pole piece A, anode pole piece A is by collector and sets
Put and be provided with peace on coating layer of active substance (the i.e. positive electrode coating) composition on collector two sides, the coating layer of active substance
Full property coat, the security coat is made up of fire retardant, electroconductive glass fibre, film forming agent, organolithium and binding agent, is hindered
The mass ratio for firing agent, electroconductive glass fibre, film forming agent, organolithium and binding agent is 40:30:20:5:10；Fire retardant is melamine
Amine condensed phosphate, film forming agent is ethylene sulfite, and organolithium is ethyl-lithium, and binding agent is polyacrylic acid；Electro-conductive glass is fine
A diameter of 8 μm of dimension, draw ratio is 5:1；The thickness of security coat is 1 μm, and porosity is 10%.
The preparation method of the lithium ion cell positive composite pole piece of the present embodiment, comprises the following steps：
1) weigh 10g polyacrylic acid to be dissolved in 500ml tetrahydrofuran, then add 40g melamine poly phosphorus
Acid esters is simultaneously uniformly dispersed, then addition 30g electroconductive glass fibres, 20g propylene sulfites and 5g ethyl-lithiums successively, is uniformly dispersed,
Obtain security coating liquid；
2) security coating liquid is coated on to the coating layer of active substance surface of anode pole piece by electrostatic spinning technique, done
Dry, it is 1 μm of lithium ion cell positive composite pole piece to obtain coat thickness.
The lithium ion battery of the present embodiment be the lithium ion cell positive composite pole piece using the present embodiment as positive plate, with people
It is that the pole piece that negative electrode active material is prepared is negative plate to make graphite, with LiPF6/ EC+DEC (volume ratios 1:1) it is electrolyte,
The films of Celgard 2400 are barrier film, the soft bag lithium ionic cell A2 prepared using conventional sectional method.
Embodiment 3
The lithium ion cell positive composite pole piece of the present embodiment, including anode pole piece A, anode pole piece A is by collector and sets
Put and be provided with peace on coating layer of active substance (the i.e. positive electrode coating) composition on collector two sides, the coating layer of active substance
Full property coat, the security coat is made up of fire retardant, electroconductive glass fibre, film forming agent, organolithium and binding agent, is hindered
The mass ratio for firing agent, electroconductive glass fibre, film forming agent, organolithium and binding agent is 60:10:10:1:20；Fire retardant is benzocarbamidine
Amine, film forming agent is ethylene carbonate, and organolithium is phenyl lithium, and binding agent is polypropylene cyanogen；A diameter of 10 μ of electroconductive glass fibre
M, draw ratio is 20:5；The thickness of security coat is 5 μm, and porosity is 20%.
The preparation method of the lithium ion cell positive composite pole piece of the present embodiment, comprises the following steps：
1) weigh 20g polypropylene cyanogen to be dissolved in 500ml hexamethylene, then add 60g benzoguanamine and disperse equal
It is even, then addition 10g electroconductive glass fibres, 10g ethylene carbonates and 1g phenyl lithiums successively, it is uniformly dispersed, obtains security coating
Liquid；
2) security coating liquid is coated on to the coating layer of active substance surface of anode pole piece by electrostatic spinning technique, done
Dry, it is 5 μm of lithium ion cell positive composite pole pieces to obtain coat thickness.
The lithium ion battery of the present embodiment be the lithium ion cell positive composite pole piece using the present embodiment as positive plate, with people
It is that the pole piece that negative electrode active material is prepared is negative plate to make graphite, with LiPF6/ EC+DEC (volume ratios 1:1) it is electrolyte,
The films of Celgard 2400 are barrier film, the soft bag lithium ionic cell A3 prepared using conventional sectional method.
Embodiment 4
The lithium ion cell positive composite pole piece of the present embodiment, including anode pole piece B, anode pole piece B is by collector and sets
Put and be provided with peace on coating layer of active substance (the i.e. positive electrode coating) composition in collector one side, the coating layer of active substance
Full property coat, the security coat is made up of fire retardant, electroconductive glass fibre, film forming agent, organolithium and binding agent, is hindered
The mass ratio for firing agent, electroconductive glass fibre, film forming agent, organolithium and binding agent is 45:25:13:2:18；Fire retardant is melamine
Amine pyrophosphate, film forming agent is dimethyl sulfite, and organolithium is lithium diisopropylamine, and binding agent is Kynoar；
A diameter of 7 μm of electroconductive glass fibre, draw ratio is 10:3；The thickness of security coat is 3 μm, and porosity is 15%.
The preparation method of the lithium ion cell positive composite pole piece of the present embodiment, comprises the following steps：
1) weigh 18g Kynoar to be dissolved in 500ml hexamethylene, then add 45g melamine pyrophosphoric
Ester is simultaneously uniformly dispersed, then addition 25g electroconductive glass fibres, 13g dimethyl sulfites and 2g lithium diisopropylamines successively, point
Dissipate uniform, obtain security coating liquid；
2) security coating liquid is coated on to the coating surface of anode pole piece by electrostatic spinning technique, dries, is applied
Coating thickness is 3 μm of lithium ion cell positive composite pole pieces.
The lithium ion battery of the present embodiment be the lithium ion cell positive composite pole piece using the present embodiment as positive plate, with people
It is that the pole piece that negative electrode active material is prepared is negative plate to make graphite, with LiPF6/ EC+DEC (volume ratios 1:1) it is electrolyte,
The films of Celgard 2400 are barrier film, the soft bag lithium ionic cell A3 prepared using conventional sectional method.
Comparative example
Comparative example is lived using the anode pole piece A employed in embodiment as positive plate by negative pole of Delanium
Property the pole piece prepared of material be negative pole, LiPF6/EC+DEC (volume ratios 1:1) be electrolyte, the films of Celgard 2400 be every
Film, the soft bag lithium ionic cell B prepared using conventional sectional method.
Experimental example
The soft bag lithium ionic cell of Example 1~3, and the following performance test of soft bag lithium ionic cell B progress respectively：
1) DC internal resistance test, acupuncture short-circuit test and imbibition ability test：
The method of testing reference of DC internal resistance test《FreedomCAR battery testing handbooks》；The test of acupuncture short-circuit test
Method is shown in UL2054 safety standard testing standards；The method of testing of imbibition ability is：Using 1ml buret, and absorb electrolysis
Liquid Vml, is added dropwise in the drop of pole piece one afterwards, and carries out timing, finishes, records the time until the electrolyte of pole piece absorbs
(t) rate of liquid aspiration, is obtained for V/t, the results are shown in Table 1.
DC internal resistance test, acupuncture short circuit and the imbibition ability test result of the soft bag lithium ionic cell of table 1
As it can be seen from table 1 relative to comparative example, the lithium ion battery using the positive pole composite pole piece of embodiment 1~3 has
Have relatively low DC internal resistance, high safety loading coefficient and imbibition ability.This is due to the safety of the positive pole composite pole piece of the present invention
Property coat in have reduction lithium ion battery ignition point fire retardant and its resistant to elevated temperatures electroconductive glass fibre material, improve
Lithium ion battery resistance to elevated temperatures；Lithium ion battery is in the non-normal use situation such as short circuit, and battery local temperature is too high, has
Higher high temperature resistant and the electroconductive glass fibre of heat dispersion and its fire retardant can reduce the ignition point of material, improve electricity
The security performance in pond；In addition, organolithium has preferable compatibility with electrolyte, moreover it is possible to improve the imbibition ability of its pole piece.
2) high rate performance and cycle performance test：
High rate performance test condition：Charged with 0.3C multiplying powers, afterwards respectively with 0.5C, 1.0C, 2.0C, 4.0C,
8.0C is discharged, 25 ± 3 DEG C of test temperature.Cycle performance test condition：Charge-discharge magnification is all 1.0C, test temperature 25 ±
3℃.High rate performance and cycle performance test result are shown in Table 2, and cycle performance test result can also be referring to Fig. 1.
High rate performance, the cycle performance of the soft bag lithium ionic cell of table 2 compare
Soft bag lithium ionic cell A1, A2, A3 high rate performance and its circulation are compared to Soft Roll it can be seen from table 2 and Fig. 1
Lithium ion battery B is obviously improved.Because containing in embodiment in the security coat on positive pole composite pole piece surface
The high electroconductive glass fibre of conductance and its organolithium additive, improve the transmission speed of lithium ion during its high rate charge-discharge
Rate and its electron transfer rate, and improve its high rate performance；The film forming agent in coat coats active material layer in charge and discharge simultaneously
Stability in electric process, and improve its cycle performance.
Claims (10)
1. a kind of lithium ion cell positive composite pole piece, including anode pole piece, the anode pole piece is by collector and is arranged on collection
Positive electrode coating composition in flow surface, it is characterised in that：Security coat is provided with the positive electrode coating,
The security coat is made up of fire retardant, electroconductive glass fibre, film forming agent, organolithium and binding agent, fire retardant, conductive glass
Glass fiber, film forming agent, the mass ratio of organolithium and binding agent are (40~60):(10~30):(10~20):(1~5):(10~
20)。
2. lithium ion cell positive composite pole piece according to claim 1, it is characterised in that：The security coat
Thickness is 1~5 μm.
3. lithium ion cell positive composite pole piece according to claim 1, it is characterised in that：The security coat
Porosity is 5~20%.
4. lithium ion cell positive composite pole piece according to claim 1, it is characterised in that：The electroconductive glass fibre
A diameter of 5~10 μm, draw ratio is 20~5：5~1.
5. lithium ion cell positive composite pole piece according to claim 1, it is characterised in that：The fire retardant is diethyl
It is phosphinic acids aluminium, melamine condensed phosphate, melamine, benzoguanamine, three (ethoxy) isocyanuric acid esters, allantoin, sweet
Urea, dicyandiamide, guanidine, carbodiimide, one kind in melamine pyrophosphoric ester.
6. lithium ion cell positive composite pole piece according to claim 1, it is characterised in that：The film forming agent is ethylene
Alkene ester, ethylene sulfite, propylene sulfite, vinylene carbonate, dimethyl sulfite, diethyl sulfite, 1,
One kind in 2- trifluoroacetic acid base ethane.
7. lithium ion cell positive composite pole piece according to claim 1, it is characterised in that：The organolithium is alkyl
One kind in lithium, chain alkenyl lithium, alkynyl lithium, aromatic radical lithium, lithium amide, 2- thienyls lithium, three (normal-butyl) lithium magnesium.
8. lithium ion cell positive composite pole piece according to claim 6, it is characterised in that：The lithium alkylide is methyl
One kind in lithium, ethyl-lithium, propyl lithium, butyl lithium, amyl group lithium, hexyl lithium, octyl group lithium, decyl lithium.
9. a kind of preparation method of lithium ion cell positive composite pole piece as claimed in claim 1, it is characterised in that：Including with
Lower step：Binding agent is dissolved in organic solvent, fire retardant is then added and is uniformly dispersed, sequentially add electro-conductive glass fine
Dimension, film forming agent and organolithium, are uniformly dispersed, obtain security coating liquid；Security coating liquid is coated in anode pole piece again
Coating surface, dries at 50~120 DEG C, produces.
10. a kind of lithium ion battery using lithium ion cell positive composite pole piece as claimed in claim 1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863516A (en) * | 2017-11-02 | 2018-03-30 | 洛阳月星新能源科技有限公司 | A kind of nitrogenous nano lithium titanate composite and preparation method thereof, lithium ion battery |
| CN113571692A (en) * | 2021-07-21 | 2021-10-29 | 合肥国轩高科动力能源有限公司 | High-safety conductive material modified high-nickel positive electrode material and preparation method thereof |
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| CN106099227A (en) * | 2016-08-26 | 2016-11-09 | 宁德时代新能源科技股份有限公司 | Battery with a battery cell |
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| CN107863516B (en) * | 2017-11-02 | 2020-07-28 | 洛阳月星新能源科技有限公司 | Nitrogen-containing nano lithium titanate composite material, preparation method thereof and lithium ion battery |
| CN113571692A (en) * | 2021-07-21 | 2021-10-29 | 合肥国轩高科动力能源有限公司 | High-safety conductive material modified high-nickel positive electrode material and preparation method thereof |
| CN113571692B (en) * | 2021-07-21 | 2022-07-12 | 合肥国轩高科动力能源有限公司 | High-safety conductive material modified high-nickel positive electrode material and preparation method thereof |
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