CN103094578B - A kind of preparation method of flexible packing lithium ion battery negative plate - Google Patents
A kind of preparation method of flexible packing lithium ion battery negative plate Download PDFInfo
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- CN103094578B CN103094578B CN201310018799.2A CN201310018799A CN103094578B CN 103094578 B CN103094578 B CN 103094578B CN 201310018799 A CN201310018799 A CN 201310018799A CN 103094578 B CN103094578 B CN 103094578B
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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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Abstract
The invention belongs to technical field of lithium ion, more particularly to a kind of preparation method of flexible packing lithium ion battery negative plate, comprise the following steps：Carbon material, Kynoar bonding agent and conductive agent are added in solvent, after being well mixed, cathode size is coated on negative current collector, forms cathode membrane；Negative plate to be baked is placed in vacuum drying oven and toasted, the temperature in baking oven is higher than the whole melting temperatur of Kynoar, makes Kynoar bonding agent be completely melt to be in a liquid state；Cooling treatment is carried out to negative plate to be cooled, completes the making of negative plate.Relative to prior art, the invention enables Kynoar bonding agent to occur crystal transfer, it is changed into the orthogonal TTTT molecular chain configurations with high remanent polarization and more high-adhesive-strength by the TGTG ' molecular chain configurations of monocline, be advantageous to improve adhesive property, so as to improve the cycle performance of battery, the circulation expansion of battery is reduced, while also improves the high rate performance of battery.
Description
Technical field
The invention belongs to technical field of lithium ion, more particularly to a kind of making of flexible packing lithium ion battery negative plate
Method.
Background technology
Lithium ion battery is a kind of electrochemical energy storage device, and it is mainly several by positive pole, negative pole, barrier film and electrolyte etc.
Part forms, and positive electrode and negative material are all the materials for being available for Lithium-ion embeding (insertion)/deintercalation (de- to insert).
Current flexible packing lithium ion battery has become the first choice of consumable electronic product, but such battery makes in consumer
During, often there is battery electric quantity and strongly reduce and (i.e. big circulation expansion) the problem of cell thickness gradually increases.Such as
These problems of fruit do not solve, and will reduce the service life of electronic product, and consumer just needs often to change battery, causes to consume
The reduction of person's satisfaction, it is oriented to so as to influence the purchase of consumer.
At present, the method for improving the problems such as flexible packing lithium ion battery cycle life is short is mainly to go out from the angle of material
Hair, such as change the surface state and internal structure of material, and improve the amount of electrolysis additive and guarantor's liquid measure of pole piece etc..And
How to solve the problem from the angle of battery production process and do not have too many successful scheme.
Under such background condition, the invention provides a kind of preparation method of flexible packing lithium ion battery negative plate,
The characteristics of flexible packing lithium ion battery negative plate made using this method has high adhesiveness and high environment friendly so that bag
The cycle life of flexible packing lithium ion battery containing the negative plate made using this method be improved significantly, after circulating battery
Bounce-back and the bounce-back of pole piece are also greatly lowered.
The content of the invention
It is an object of the invention to：In view of the shortcomings of the prior art, a kind of flexible packing lithium ion battery negative plate is provided
Preparation method, the flexible packing lithium ion battery negative plate made using this method has high adhesiveness and high environment friendly
Feature so that comprising using this method make negative plate flexible packing lithium ion battery cycle life be improved significantly,
The bounce-back of bounce-back and pole piece after circulating battery is also greatly lowered, to overcome flexible packing lithium ion battery of the prior art to follow
Ring short life and circulation expand big deficiency.
In order to realize foregoing invention purpose, the present invention adopts the following technical scheme that：
A kind of preparation method of flexible packing lithium ion battery negative plate, the negative plate include negative current collector and are coated in
The cathode membrane on the negative current collector surface, it is characterised in that comprise the following steps：
Step 1, by carbon material, Kynoar bonding agent and conductive agent according to mass ratio（80-99）：（0.5-10）：
（0.5-10）Add in solvent, after being well mixed, obtain cathode size, then cathode size is coated on negative current collector,
Cathode membrane is formed after drying on the negative current collector, negative plate to be baked is obtained after cold pressing；
Step 2, negative plate to be baked is placed in vacuum drying oven and toasted, the temperature in the vacuum drying oven is higher than institute
The whole melting temperatur of Kynoar bonding agent is stated, makes Kynoar bonding agent be completely melt to be evenly distributed on negative pole after being in a liquid state
In the hole of diaphragm, because the Kynoar bonding agent that fusing is in a liquid state can flow in the hole of cathode membrane, so that
Kynoar bonding agent can be evenly distributed in cathode membrane, improve the utilization rate of Kynoar bonding agent；Obtain
Negative plate to be cooled；
Step 3, cooling treatment is carried out to negative plate to be cooled, the temperature of negative plate is dropped in 30min-600min
To room temperature so that Kynoar bonding agent is changed into orthogonal TTTT molecular chain configurations by the TGTG ' molecular chain configurations of monocline,
Even if crystal transfer occurs for Kynoar bonding agent, the orthogonal TTTT molecular chain configurations obtained after transformation have high residue
The adhesive strength of polarization intensity and Geng Gao, so that pole piece has more excellent adhesion property, complete the making of negative plate.In order to
Make Kynoar bonding agent that crystal transfer occur, the speed of cooling needs to be subject to strict control.
Wherein, TGTG ' molecular chain configurations are the molecular conformations of alpha type crystal, and two strand dipoles are in opposite direction in structure cell,
For nonpolar phase；TTTT molecular chain configurations（All transconfiguration）It is the molecular conformation of β type crystal, CF2 dipoles are towards same side
To strand is arranged parallel to each other in b direction of principal axis, thus has big spontaneous polarization.
The a kind of of preparation method as flexible packing lithium ion battery negative plate of the present invention is improved, and vacuum described in step 2 is dried
The vacuum of case is -80 ~ -99kpa.High vacuum can ensure that negative current collector will not be oxidized, and ensure that negative pole currect collecting
The excellent electric conductivity of body will not be destroyed.
The a kind of of preparation method as flexible packing lithium ion battery negative plate of the present invention improves, and is toasted described in step 2
Time is 1 ~ 10h.Different baking times, can cause the fine or not difference of the mobility of Kynoar bonding agent, during baking
Between it is longer, the mobility of liquid adhesive is more active, and the distribution of bonding agent is more uniform, and the consistency of performance of obtained battery is got over
Good, such battery more has superiority when being assembled into battery pack.But baking time is oversize, production efficiency can be influenceed again.
The a kind of of preparation method as flexible packing lithium ion battery negative plate of the present invention improves, and is toasted described in step 2
Time is 2 ~ 5h, and this is preferable scope, can both ensure that Kynoar has preferable mobility, and can ensures higher
Production efficiency.
The a kind of of preparation method as flexible packing lithium ion battery negative plate of the present invention improves, and the Kynoar glues
The whole melting temperatur for connecing agent is 150-200 DEG C.As a kind of polymer substance, the molecular weight of Kynoar bonding agent is not one
The value of individual determination, but a scope, this results in its fusing point and is not also the value of a determination, but has a humidity province
Between, we can be referred to as melting range, and two limits are referred to as initial melting temperature and whole melting temperatur（The temperature that i.e. material is completely dissolved）.And
And as the difference of its molecular weight, its melting range can also change.In order that Kynoar bonding agent is completely melt, should protect
Card baking temperature is more than whole melting temperatur.
The a kind of of preparation method as flexible packing lithium ion battery negative plate of the present invention is improved, and vacuum described in step 2 is dried
Temperature in case is 160 ~ 220 DEG C.Under the baking temperature, Kynoar bonding agent can be fused into liquid, be advantageous to poly- inclined
PVF bonding agent is flowed in the hole of cathode membrane so that Kynoar is uniformly distributed.
The a kind of of preparation method as flexible packing lithium ion battery negative plate of the present invention improves, to be cooled in step 3
Negative plate carry out cooling treatment when, the temperature of negative plate is down to room temperature in 60min-300min.
The a kind of of preparation method as flexible packing lithium ion battery negative plate of the present invention improves, and the carbon material is natural
At least one of graphite, Delanium and MCMB.
The a kind of of preparation method as flexible packing lithium ion battery negative plate of the present invention improves, and the conductive agent is conduction
At least one of carbon, superconduction carbon, acetylene black, CNT, graphene and carbon fiber.
The a kind of of preparation method as flexible packing lithium ion battery negative plate of the present invention improves, and the solvent is N- methyl
Pyrrolidones.
Relative to prior art, the manufacture craft of the invention by optimizing anode plate for lithium ionic cell, including baking temperature
With the optimization of the factor such as cool time so that the distribution of bonding agent is more uniform in negative plate, and causes Kynoar to glue
Connect agent and crystal transfer occurs, be changed into orthogonal TTTT molecular chain configurations by the TGTG ' molecular chain configurations of monocline, and it is orthogonal
TTTT molecular chain configurations have high remanent polarization and more high-adhesive-strength, are advantageous to improve carbon material particles and negative pole collection
Adhesive property between fluid and between carbon material particles and carbon material particles, prepared so as to improve to include using this method
Battery cycle performance, reduce the circulation expansion and the bounce-back of pole piece of battery, while also significantly increase the charging of battery
Multiplying power.In addition, the present invention has the characteristics of simple to operate, controllability is strong and practical, the performance boost for battery rises
Beneficial effect is arrived.
Brief description of the drawings
Fig. 1 is the XRD spectra of the Kynoar bonding agent in the present invention before and after treatment.
Fig. 2 is that numbering is S1 and the rate of charge performance plot of D1 flexible packing lithium ion battery in the present invention.
Embodiment
With reference to specific embodiments and the drawings explanation the present invention is further elaborated, but the present invention be not limited in
Lower embodiment.
Embodiment 1, a kind of preparation method for flexible packing lithium ion battery negative plate that the present embodiment provides, negative plate include
Negative current collector and the cathode membrane coated in negative current collector surface, this method comprise the following steps：
Step 1, by Delanium, Kynoar bonding agent（Whole melting temperatur is 170 DEG C）With conductive carbon according to mass ratio
Example 96：2：2 add in solvent N-methyl pyrilidone, after being well mixed, obtain cathode size, are then coated on cathode size
On negative current collector, cathode membrane is formed on negative current collector after drying, negative plate to be baked is obtained after cold pressing.
Step 2, negative plate to be baked is placed in vacuum drying oven and toasted, the temperature in vacuum drying oven is 180 DEG C, is dried
The roasting time is 3h, and the vacuum of vacuum drying oven is -90kpa, makes Kynoar bonding agent be completely melt uniformly to divide after being in a liquid state
Cloth obtains negative plate to be cooled in the hole of cathode membrane.
Step 3, cooling treatment is carried out to negative plate to be cooled, the temperature of negative plate is down to room temperature in 100min,
So that Kynoar bonding agent is changed into orthogonal TTTT molecular chain configurations by the TGTG ' molecular chain configurations of monocline, complete negative
The making of pole piece.
Embodiment 2, a kind of preparation method for flexible packing lithium ion battery negative plate that the present embodiment provides, negative plate include
Negative current collector and the cathode membrane coated in negative current collector surface, this method comprise the following steps：
Step 1, by native graphite, Kynoar bonding agent（Whole melting temperatur is 155 DEG C）With superconduction carbon according to mass ratio
Example 94：3：3 add in solvent N-methyl pyrilidone, after being well mixed, obtain cathode size, are then coated on cathode size
On negative current collector, cathode membrane is formed on negative current collector after drying, negative plate to be baked is obtained after cold pressing.
Step 2, negative plate to be baked is placed in vacuum drying oven and toasted, the temperature in vacuum drying oven is 160 DEG C, is dried
The roasting time is 10h, and the vacuum of vacuum drying oven is -80kpa, makes Kynoar bonding agent be completely melt uniformly to divide after being in a liquid state
Cloth obtains negative plate to be cooled in the hole of cathode membrane.
Step 3, cooling treatment is carried out to negative plate to be cooled, the temperature of negative plate is down to room temperature in 30min,
So that Kynoar bonding agent is changed into orthogonal TTTT molecular chain configurations by the TGTG ' molecular chain configurations of monocline, complete negative
The making of pole piece.
Embodiment 3, a kind of preparation method for flexible packing lithium ion battery negative plate that the present embodiment provides, negative plate include
Negative current collector and the cathode membrane coated in negative current collector surface, this method comprise the following steps：
Step 1, by MCMB, Kynoar bonding agent（Whole melting temperatur is 180 DEG C）Quality is shone with acetylene black
Ratio 90：5：5 add in solvent N-methyl pyrilidone, after being well mixed, obtain cathode size, are then coated with cathode size
On negative current collector, cathode membrane is formed on negative current collector after drying, negative plate to be baked is obtained after cold pressing.
Step 2, negative plate to be baked is placed in vacuum drying oven and toasted, the temperature in vacuum drying oven is 200 DEG C, is dried
The roasting time is 1h, and the vacuum of vacuum drying oven is -99kpa, makes Kynoar bonding agent be completely melt uniformly to divide after being in a liquid state
Cloth obtains negative plate to be cooled in the hole of cathode membrane.
Step 3, cooling treatment is carried out to negative plate to be cooled, the temperature of negative plate is down to room temperature in 600min,
So that Kynoar bonding agent is changed into orthogonal TTTT molecular chain configurations by the TGTG ' molecular chain configurations of monocline, complete negative
The making of pole piece.
Embodiment 4, a kind of preparation method for flexible packing lithium ion battery negative plate that the present embodiment provides, negative plate include
Negative current collector and the cathode membrane coated in negative current collector surface, this method comprise the following steps：
Step 1, by native graphite and the mixture of Delanium（The mass ratio of the two is 4:1）, Kynoar bonding
Agent（Whole melting temperatur is 185 DEG C）Mass ratio 98 is shone with CNT：1：1 adds in solvent N-methyl pyrilidone, and mixing is equal
After even, cathode size is obtained, then cathode size is coated on negative current collector, formed and born on negative current collector after drying
Pole diaphragm, negative plate to be baked is obtained after cold pressing.
Step 2, negative plate to be baked is placed in vacuum drying oven and toasted, the temperature in vacuum drying oven is 210 DEG C, is dried
The roasting time is 5h, and the vacuum of vacuum drying oven is -95kpa, makes Kynoar bonding agent be completely melt uniformly to divide after being in a liquid state
Cloth obtains negative plate to be cooled in the hole of cathode membrane.
Step 3, cooling treatment is carried out to negative plate to be cooled, the temperature of negative plate is down to room temperature in 300min,
So that Kynoar bonding agent is changed into orthogonal TTTT molecular chain configurations by the TGTG ' molecular chain configurations of monocline, complete negative
The making of pole piece.
Embodiment 5, a kind of preparation method for flexible packing lithium ion battery negative plate that the present embodiment provides, negative plate include
Negative current collector and the cathode membrane coated in negative current collector surface, this method comprise the following steps：
Step 1, by native graphite and the mixture of MCMB（The mass ratio of the two is 4:1）, Kynoar
Bonding agent（Whole melting temperatur is 165 DEG C）, graphene and carbon fiber mixture（The mass ratio of the two is 1:2）According to mass ratio
88：6：6 add in solvent N-methyl pyrilidone, after being well mixed, obtain cathode size, are then coated on cathode size negative
On the collector of pole, cathode membrane is formed on negative current collector after drying, negative plate to be baked is obtained after cold pressing.
Step 2, negative plate to be baked is placed in vacuum drying oven and toasted, the temperature in vacuum drying oven is 170 DEG C, is dried
The roasting time is 7h, and the vacuum of vacuum drying oven is -90kpa, makes Kynoar bonding agent be completely melt uniformly to divide after being in a liquid state
Cloth obtains negative plate to be cooled in the hole of cathode membrane.
Step 3, cooling treatment is carried out to negative plate to be cooled, the temperature of negative plate is down to room temperature in 150min,
So that Kynoar bonding agent is changed into orthogonal TTTT molecular chain configurations by the TGTG ' molecular chain configurations of monocline, complete negative
The making of pole piece.
Embodiment 6, a kind of preparation method for flexible packing lithium ion battery negative plate that the present embodiment provides, negative plate include
Negative current collector and the cathode membrane coated in negative current collector surface, this method comprise the following steps：
Step 1, by Delanium and the mixture of MCMB（The mass ratio of the two is 3:1）, Kynoar
Bonding agent（Whole melting temperatur is 150 DEG C）, conductive carbon mixture shine mass ratio 97：2：1 adds solvent N-methyl pyrilidone
In, after being well mixed, cathode size is obtained, then cathode size is coated on negative current collector, in negative pole currect collecting after drying
Cathode membrane is formed on body, negative plate to be baked is obtained after cold pressing.
Step 2, negative plate to be baked is placed in vacuum drying oven and toasted, the temperature in vacuum drying oven is 160 DEG C, is dried
The roasting time is 2h, and the vacuum of vacuum drying oven is -94kpa, makes Kynoar bonding agent be completely melt uniformly to divide after being in a liquid state
Cloth obtains negative plate to be cooled in the hole of cathode membrane.
Step 3, cooling treatment is carried out to negative plate to be cooled, the temperature of negative plate is down to room temperature in 450min,
So that Kynoar bonding agent is changed into orthogonal TTTT molecular chain configurations by the TGTG ' molecular chain configurations of monocline, complete negative
The making of pole piece.
Embodiment 7, a kind of preparation method for flexible packing lithium ion battery negative plate that the present embodiment provides, negative plate include
Negative current collector and the cathode membrane coated in negative current collector surface, this method comprise the following steps：
Step 1, by Delanium, Kynoar bonding agent（Whole melting temperatur is 200 DEG C）, acetylene black mixture shine
Mass ratio 95：2：3 add in solvent N-methyl pyrilidone, after being well mixed, cathode size are obtained, then by cathode size
It is coated on negative current collector, cathode membrane is formed on negative current collector after drying, negative plate to be baked is obtained after cold pressing.
Step 2, negative plate to be baked is placed in vacuum drying oven and toasted, the temperature in vacuum drying oven is 220 DEG C, is dried
The roasting time is 1.5h, and the vacuum of vacuum drying oven is -88kpa, Kynoar bonding agent is completely melt after being in a liquid state uniformly
It is distributed in the hole of cathode membrane, obtains negative plate to be cooled.
Step 3, cooling treatment is carried out to negative plate to be cooled, the temperature of negative plate is down to room temperature in 90min,
So that Kynoar bonding agent is changed into orthogonal TTTT molecular chain configurations by the TGTG ' molecular chain configurations of monocline, complete negative
The making of pole piece.
Comparative example 1, a kind of preparation method for flexible packing lithium ion battery negative plate that this comparative example provides, negative plate include
Negative current collector and the cathode membrane coated in negative current collector surface, this method comprise the following steps：
Step 1, by Delanium, Kynoar bonding agent（Whole melting temperatur is 170 DEG C）With conductive carbon according to mass ratio
Example 96：2：2 add in solvent N-methyl pyrilidone, after being well mixed, obtain cathode size, are then coated on cathode size
On negative current collector, cathode membrane is formed on negative current collector after drying, negative plate to be baked is obtained after cold pressing.
Step 2, negative plate to be baked is placed in 110 DEG C of baking oven and toasts 3h.
In order to verify the crystal transfer of Kynoar bonding agent, by Kynoar bonding agent vacuum for-
3h is toasted in 90kpa, the baking oven that temperature is 180 DEG C, room temperature is then cooled in 100min, then to processing more than passing through
Kynoar bonding agent carries out XRD（X-ray diffraction）Test, the XRD spectra of gained are shown in Fig. 1.As a comparison, to without
The Kynoar bonding agent system of any processing is same to carry out XRD（X-ray diffraction）Test, the XRD spectra of gained are shown in Fig. 1.By
Fig. 1 can be seen that：Compared with untreated Kynoar bonding agent, the Kynoar bonding agent after processing occurs orthogonal
TTTT molecular chain configurations, orthogonal TTTT molecular chain configurations have high remanent polarization and Geng Gao adhesive strength, from
And cause pole piece that there is more excellent adhesion property.
The negative plate prepared to the method using embodiment 1-7 and comparative example 1 is bonded using 180 ° of reverse stripping methods
Power is tested, and acquired results are shown in Table 1.
Table 1：The bonding force test result of the negative plate prepared using the method for embodiment 1-7 and comparative example 1.
As can be seen from Table 1, the bonding force of the negative plate prepared using the method for the present invention is apparently higher than using comparative example
Method prepare negative plate, this show the present invention method can be so that the bonding force of negative plate be improved significantly.
Respectively by using negative plate prepared by embodiment 1-7 and comparative example 1 method and positive plate, barrier film and electrolyte system
Flexible packing lithium ion battery is made, battery numbering is followed successively by S1-S7 and D1.
It is S1-S7 to numbering and D1 flexible packing lithium ion battery carries out 25 DEG C of loop tests, and records follow for 100 times respectively
Ring, 200 circulations and 300 circulations（Rate of charge and discharge-rate are 0.5C）The thickness swelling of battery afterwards, gained
It the results are shown in Table 2.
As can be seen from Table 2：The flexible packing lithium ion battery that the negative plate prepared using the method for the present invention is assembled into follows
Thickness swelling after ring is obviously reduced, and this shows that the expansion bounce-back of negative plate in itself also reduces to a certain extent, and this is main
Being attributed to the orthogonal TTTT molecular chain configurations that Kynoar bonding agent occurs to be formed after crystal transfer has high remaining pole
Change intensity and more high-adhesive-strength, so that pole piece has a more excellent adhesion property, the circulation that reduce further battery is swollen
It is swollen.Moreover, the cycle life after the flexible packing lithium ion battery circulation that the negative plate prepared using the method for the present invention is assembled into
Be improved significantly, so as to which the user satisfaction of consumer be greatly improved, and then improve the market position of such battery.
Table 2：Numbering is S1-S7 and the loop test result of D1 flexible packing lithium ion battery.
To numbering be S1 and D1 flexible packing lithium ion battery carry out high rate performance（0.2C, 0.5C, 1C, 1.5C, 2C）Survey
Examination, acquired results are shown in Fig. 2.
As shown in Figure 2：The charging for the flexible packing lithium ion battery that the negative plate prepared using the method for the present invention is assembled into
Multiplying power be improved significantly, i.e., the constant-current charge capability retention under identical rate of charge is higher, this indicate that with height
Remanent polarization and the Kynoar bonding agent of excellent adhesion property the high rate performance of battery is greatly improved work
With.
The announcement and teaching of book according to the above description, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula carries out appropriate change and modification.Therefore, the invention is not limited in embodiment disclosed and described above, to this
Some modifications and changes of invention should also be as falling into the scope of the claims of the present invention.In addition, although this specification
In used some specific terms, but these terms are merely for convenience of description, do not form any restrictions to the present invention.
Claims (7)
1. a kind of preparation method of flexible packing lithium ion battery negative plate, the negative plate includes negative current collector and coated in institute
State the cathode membrane on negative current collector surface, it is characterised in that comprise the following steps：
Step 1, by carbon material, Kynoar bonding agent and conductive agent according to mass ratio（80-99）：（0.5-10）：
（0.5-10）Add in solvent, after being well mixed, obtain cathode size, then cathode size is coated on negative current collector,
Cathode membrane is formed after drying on the negative current collector, negative plate to be baked is obtained after cold pressing；
Step 2, negative plate to be baked is placed in vacuum drying oven and toasted, the temperature in the vacuum drying oven is poly- higher than described
The whole melting temperatur of vinylidene bonding agent, Kynoar bonding agent is set to be completely melt to be evenly distributed on cathode membrane after being in a liquid state
Hole in, obtain negative plate to be cooled；The whole melting temperatur of the Kynoar bonding agent is 150-200 DEG C, the vacuum
Temperature in baking oven is 160 ~ 220 DEG C；
Step 3, cooling treatment is carried out to negative plate to be cooled, the temperature of negative plate is down to room in 60min-300min
Temperature so that Kynoar bonding agent is changed into orthogonal TTTT molecular chain configurations by the TGTG ' molecular chain configurations of monocline, complete
Into the making of negative plate.
2. the preparation method of the flexible packing lithium ion battery negative plate according to claim 1, it is characterised in that：Step 2
The vacuum of the vacuum drying oven is -80 ~ -99kpa.
3. the preparation method of the flexible packing lithium ion battery negative plate according to claim 1, it is characterised in that：Step 2
The time of the baking is 1 ~ 10h.
4. the preparation method of the flexible packing lithium ion battery negative plate according to claim 3, it is characterised in that：Step 2
The time of the baking is 2 ~ 5h.
5. the preparation method of the flexible packing lithium ion battery negative plate according to claim 1, it is characterised in that：The carbon
Material is at least one of native graphite, Delanium and MCMB.
6. the preparation method of the flexible packing lithium ion battery negative plate according to claim 1, it is characterised in that：It is described to lead
Electric agent is at least one of superconduction carbon, acetylene black, CNT, graphene and carbon fiber.
7. the preparation method of the flexible packing lithium ion battery negative plate according to claim 1, it is characterised in that：It is described molten
Agent is 1-METHYLPYRROLIDONE.
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| CN106848400A (en) * | 2017-01-11 | 2017-06-13 | 长兴天晟能源科技有限公司 | A kind of highly secure lithium ion battery electrolyte and lithium ion battery |
| CN106848401A (en) * | 2017-01-11 | 2017-06-13 | 长兴天晟能源科技有限公司 | A kind of lithium ion battery high temperature from the preparation method for blocking electrolyte |
| CN111192995A (en) * | 2018-11-15 | 2020-05-22 | 微宏动力***（湖州）有限公司 | High-cohesiveness battery diaphragm, preparation method thereof and lithium ion battery |
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| CN101964428A (en) * | 2010-08-05 | 2011-02-02 | 深圳市贝特瑞新能源材料股份有限公司 | Preparation method of lamellar lithium manganese battery |
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| CN103094578A (en) | 2013-05-08 |
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