CN108666616A - A kind of lithium-ion battery electrolytes and battery - Google Patents
A kind of lithium-ion battery electrolytes and battery Download PDFInfo
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- CN108666616A CN108666616A CN201710204908.8A CN201710204908A CN108666616A CN 108666616 A CN108666616 A CN 108666616A CN 201710204908 A CN201710204908 A CN 201710204908A CN 108666616 A CN108666616 A CN 108666616A
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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
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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
- H01M10/05—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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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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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- 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 present invention provides a kind of electrolyte, including lithium salts, additive and organic solvent, wherein the additive is polyethylene glycol polypropylene glycol polyethylene glycol.The present invention also provides a kind of battery, which uses electrolyte provided by the invention.Electrolyte and battery provided by the invention can effectively control the thermal runaway phenomenon being likely to occur during battery use, and at the same time to the negative effect very little of battery performance itself.
Description
Technical field
The invention belongs to cell safety field more particularly to a kind of lithium-ion battery electrolytes and battery.
Background technology
As people are higher and higher to the attention degree of environment, environmental consciousness is more and more stronger；As replacement conventional fuel oil vapour
The new energy vehicle of vehicle, demand are also increasing.But on road surface new energy vehicle quantity be continuously increased, safety
Especially as the safety of the power battery of new energy vehicle power source, just become more and more important.
In power battery/lithium ion battery, due to the use of flammable carbonates electrolyte；In use, may be used
It can be put or due under accidental impact because overcharging or crossing（Especially under the influence of the factors such as needle thorn）, cause monomer electric
Pond internal-response aggravation so that internal temperature of battery increases, and leads to the appearance of the safety problems such as battery thermal runaway, nature, explosion.
Therefore, security performance of the battery in the case where overcharging, mistake being put or extreme condition how is improved, limitation Development of Electric Vehicles is become
A great problem.
Under normal circumstances, it is both provided with safety valve on power battery, when internal pressure is excessive, which can be because of inside
Pressure and open, discharge the pressure of inside battery, improve the safety of battery.But in actual use, it is often possible to
The case where appearance inside battery has occurred and that vigorous reaction, and safety valve is not opened；Or inside battery is violent anti-
It answers, safety valve cannot be made to be opened at the first time, the delay for causing safety measure to start can all cause battery unfavorable shadow
It rings.
In the prior art, part way is to add flame-retardant additive in the electrolytic solution, to prevent the burning of inside battery；Portion
Point way is to introduce to be thermally decomposed and can be generated the substance of water and allow in the case where exception occurs in battery in battery system
Inside battery forms bulk gas, the opening of safety valve so that auxiliary is set out.
But the way of flame-retardant additive is added in the electrolytic solution, it, can be tight since flame-retardant additive has larger viscosity
The lithium ion transport performance of electrolyte, and then the electrochemical performances such as high rate performance for reducing lithium battery are influenced again.
And the substance that water can be generated by thermal decomposition is introduced in battery system, in the method, it is common practice to by this
In material mixing to the slurry of positive or negative pole, then on being coated to collector.Since this substance is all that non-electrochemical is lived
Property and conductivity it is extremely low, therefore the energy density of battery can be significantly affected；In addition to this, the substance generally use is knot
Brilliant hydrate can contain a small amount of absorption water, and then influence electrolyte system, cause lithium battery performance poor.This method
Drawback also resides in, and the decomposition of substance is slower for the thermal response of inside battery, can not inhibit thermal runaway in time.
Invention content
The present invention is to solve scheme in the prior art although thermal runaway can be solved the problems, such as to a certain extent
The technical issues of being brought a negative impact to the performance of battery itself, thermal runaway phenomenon can effectively be controlled by providing one kind, and same
When to the electrolyte and battery of the negative effect very little of battery performance itself.
The present invention provides a kind of lithium-ion battery electrolytes, including lithium salts, additive and organic solvent, wherein described
Additive is polyethylene glycol propylene glycol-polyethylene glycol.
In the present invention, when battery because overcharging, cross and put or when needle thorn etc. causes its internal temperature to increase, adding in electrolyte
Add agent polyethylene glycol propylene glycol-polyethylene glycol（PEO-PPO-PEO）It can be generated mutually with lithium salts and its decomposition product due to heated
Effect, jelly is generated after reaction；And the newly-generated jelly can be covered in positive and negative pole surface and form protective film, increased dramatically
Lithium battery internal resistance, avoids positive and negative anodes from being in direct contact, and to suppress thermal runaway, improves the safety of battery.Meanwhile above-mentioned additive
The thermal response temperature of PEO-PPO-PEO generally at 90 DEG C -120 DEG C, under general room temperature on the performance of electrolyte itself influence compared with
It is small, for example, being influenced on the conductivity of electrolyte under room temperature very small.Therefore, in electrolyte provided by the invention, additive adds
Enter, on the one hand can be good at controlling inside battery thermal runaway phenomenon, improve the safety of battery；On the other hand, to battery sheet
The negative effect of body performance is very small, solves technical problem present in background of invention well.
In addition, the present invention provides a kind of battery, including shell, the pole piece and electrolyte that are contained in shell, the electricity
Solution liquid is lithium-ion battery electrolytes provided by the invention.
Description of the drawings
Fig. 1 is embodiment 1-6 and the needle thorn experimental temperature variation diagram of comparative example 1.
Fig. 2 is the pole piece SEM figures after comparative example 1 heats.
Fig. 3 is the pole piece SEM figures after embodiment 3 heats.
Specific implementation mode
In order to make the technical problems, technical solutions and beneficial effects solved by the present invention be more clearly understood, below in conjunction with
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 the present invention, it is not intended to limit the present invention.
The present invention provides a kind of electrolyte, including lithium salts, additive and organic solvent, wherein the additive is poly-
Ethylene glycol-polypropylene glycol-polyethylene glycol.
In the present invention, when battery because overcharging, cross and put or when needle thorn etc. causes its internal temperature to increase, adding in electrolyte
Add agent polyethylene glycol propylene glycol-polyethylene glycol（PEO-PPO-PEO）It can interact with electrolyte system due to heated
（For example, the phosphorus pentafluoride that lithium hexafluoro phosphate is generated by thermal decomposition, is a kind of strong lewis acid；The electrolyte system of other lithium salts,
Also of this sort strong lewis acid group can be generated by thermal decomposition, and PEO-PPO-PEO can be anti-with these strong lewis acids
It answers）, jelly product is generated after reaction；And the newly-generated jelly can be covered in positive and negative pole surface and form protective film, drastically
Increase lithium battery internal resistance, avoids positive and negative anodes from being in direct contact, to suppress thermal runaway, improve the safety of battery.Meanwhile above-mentioned adding
Add the hot relevant temperature of agent PEO-PPO-PEO generally at 90 DEG C -120 DEG C, to the performance shadow of electrolyte itself under general room temperature
Sound is smaller, for example, being influenced on the conductivity of electrolyte under room temperature very small.Therefore, in electrolyte provided by the invention, additive
Addition, on the one hand can be good at control inside battery thermal runaway phenomenon, improve the safety of battery；On the other hand, to electricity
The negative effect of pond performance itself is very small, solves technical problem present in background of invention well.
Meanwhile PEO-PPO-PEO is due to the low and nontoxic superior function of its price, other chemical fields application also compared with
It is extensive.
In a preferred embodiment of the invention, on the basis of the total volume of electrolyte, it is comprising percent by volume in electrolyte
The additive of 0.5%-20%.Additive within this range can play good effect, and not interfere with the property of battery
Energy.
In order to preferably embody the effect of additive, reach better effect, the mean molecule of preferable additives of the present invention
Amount is 1800-10000, can further increase the performance of battery of the present invention.
In the present invention, it is preferable that lithium salts is selected from LiPF6, one or more of LiBOB, LiTFSI or LiFSI.
In the present invention, it is preferable that a concentration of 0.5mol/L-3mol/L of lithium salts.
In the present invention, in order to further increase the intersolubility of PEO-PPO-PEO and organic solvent, organic solvent is preferably selected from
One or more of cyclic carbonate or linear carbonate.PEO-PPO-PEO has the performance of surfactant, especially can
It is good with carbonates electrolyte intersolubility；It is also possible to improve active material particle and electrolyte in long period cyclic process
Between contact problems.
More specifically, the cyclic carbonate is selected from ethylene carbonate（EC）And/or propene carbonate（PC）.EC and PC tools
Have compared with high-flash, and stable SEI films can be formed in cathode.
Further, the linear carbonate is selected from dimethyl carbonate（DMC）, diethyl carbonate（DEC）, dipropyl carbonate
（DPC）Or methyl ethyl ester（EMC）One or more of.Above several linear carbonates have lower viscosity, can
To improve the excessively high problem of EC or PC viscosity, the lithium ion diffusivity of mixed electrolytic solution is improved.
In addition, in order to improve the stability of cathode SEI films, it is also added with cathode film formation additive in the electrolytic solution, with electricity
On the basis of the gross mass for solving liquid, the mass percent of the cathode film formation additive contained in electrolyte is 0.5%-2%.
More specifically, the cathode film formation additive is vinylene carbonate fat（VC）Or fluoro ethylene carbonate（FEC）.
In some embodiments of the invention, the organic solvent is ethylene carbonate, diethyl carbonate and methyl
The volume ratio of the mixed solution of ethyl ester composition, the ethylene carbonate, diethyl carbonate and methyl ethyl ester is 1:1:
1。
In addition, the present invention also provides a kind of battery, including shell, the pole piece that is contained in the shell and electrolysis
Liquid, wherein above-mentioned electrolyte is electrolyte provided by the invention.
In the present invention, above-mentioned pole piece is formed by positive plate, negative plate and membrane winding.
The preparation method of battery provided by the invention：
Step 1 prepares electrolyte：The electrolyte is the above electrolyte provided by the invention；
Step 2 prepares pole piece：It is wound after positive plate, diaphragm and negative plate are stacked gradually, obtains pole piece；
Step 3, encapsulation battery：The pole piece being prepared in step 2 is packed into shell；
Step 4, fluid injection, sealing：Electrolyte is injected into shell and is sealed, and battery is made.
Embodiment 1
（1）The preparation of anode
By cobalt acid lithium, acetylene black, polytetrafluoroethylene (PTFE) and N-Methyl pyrrolidone according to weight ratio be 100：3：2：50 ratio is mixed
Conjunction stirs into slurry, which is uniformly coated to the both sides of conducting base aluminium foil, then drying at 110 DEG C, roll-in, cut
The positive plate that size is 485 millimeters × 44 millimeters × 0.140 millimeter is made.
（2）The preparation of cathode
By natural graphite, carboxymethyl cellulose, butadiene-styrene rubber and water according to 100：2：2：180 weight ratio, which is sufficiently mixed, to be stirred
To uniform slurry, which is uniformly coated on to the both sides of 0.008 millimeter of conducting base copper foil, 100 DEG C dry, finally,
The negative plate that cut obtained size is 480 millimeters × 45 millimeters × 0.156 millimeter.
（3）The assembly of battery
The positive plate, negative plate and polypropylene screen of above-mentioned preparation are wound into the pole piece of a square lithium ion battery, then will
Electrolyte is in the amount injection aluminum plastic film of 3.6g/Ah, flexible packing lithium ion battery S1 is made in sealing.The ingredient of electrolyte is：Have
Solvent 45ml chooses the mixed organic solvents containing EC, EMC and DEC simultaneously, and the wherein volume ratio of EC, EMC and DEC is 1:
1:1;Additive（PEO-PPO-PEO, Aladdin）5ml, the wherein average molecular weight of PEO-PPO-PEO are 2900；It is added certain
The LiPF of amount6, a concentration of 1mol/L.
Embodiment 2
Battery S2 is prepared using method and step same as Example 1, the difference is that the ingredient of electrolyte is：Organic solvent
42.5ml chooses the mixed organic solvents containing EC, EMC and DEC simultaneously, and the wherein volume ratio of EC, EMC and DEC is 1:1:1;
Additive（PEO-PPO-PEO, Aladdin）7.5ml, the wherein average molecular weight of PEO-PPO-PEO are 2900；It is added a certain amount of
LiPF6, a concentration of 1mol/L.
Embodiment 3
Battery S3 is prepared using method and step same as Example 1, the difference is that the ingredient of electrolyte is：Organic solvent
40ml chooses the mixed organic solvents containing EC, EMC and DEC simultaneously, and the wherein volume ratio of EC, EMC and DEC is 1:1:1;Add
Add agent（PEO-PPO-PEO, Aladdin）10ml, the wherein average molecular weight of PEO-PPO-PEO are 2900；It is added a certain amount of
LiPF6, a concentration of 1mol/L.
Embodiment 4
Battery S4 is prepared using method and step same as Example 1, the difference is that PEO-PPO-PEO（Aladdin）Average mark
Son amount is 3500.
Embodiment 5
Battery S5 is prepared using method and step same as Example 1, the difference is that organic solvent is acetonitrile（Aladdin）.
Embodiment 6
Battery S6 is prepared using method and step same as Example 1, the difference is that also containing quality point in the ingredient of electrolyte
The VC that number is 1.5%.（Cathode film formation additive）
Comparative example 1
Battery DS1 is prepared using method and step same as Example 1, the difference is that electrolyte：The organic solvent of 50ml, should
Organic solvent chooses the mixed organic solvents containing EC, EMC and DEC simultaneously, and the wherein volume ratio of EC, EMC and DEC is 1:1:1；
A certain amount of LiPF is added6, a concentration of 1mol/L.
Performance test：
1, are prepared by battery DS1 and carries out puncture experiment by above-described embodiment 1-6 battery S1-S6 prepared and comparative example 1：It is first right
Battery S1-S6 and comparative example 1 prepared by above-described embodiment 1-6 is prepared battery DS1 and carries out charge and discharge, charging and discharging currents size
For 0.1C, charging/discharging voltage range is 2.65V-4.35V；After 1 circle of 0.1C cycles, 4.35V is charged to, when 2.5Ah capacity, carry out
Puncture experiment.The temperature change for puncturing battery in experiment is detected simultaneously.Puncture being described in detail as follows for experiment：
1. 0.2C electric currents charge to upper limit voltage 4.20V (4.35V/4.40V), cut-off condition 0.02C；
2. fully penetrating the center of battery core with the speed of 150mm/s using the draw point of diameter 3mm, piercing state is kept;
3. battery core surface temperature terminates test when dropping to 35 DEG C or less；
Pass through standard：Cell temperature<200 DEG C, do not explode, be not on fire, do not smolder
2、SEM（Scanning electron microscope）Test：Use instrument model for JSM-7600F, FESEM/EDS-field emission scanning electron microscope and attached
Part energy disperse spectroscopy observes the surface condition of pole piece.Battery carries out charge and discharge within the scope of 2.75 ~ 4.35V of charging/discharging voltage, with 1 C multiplying powers
After 50 circle of electricity cycle, it is recharged to 100% SOC；Then battery is disassembled in the glove box full of argon gas, by positive plate
Separation；After being finally sealed processing using aluminum plastic film hermetic bag in glove box, then carry out SEM relevant characterizations.
Test result such as table 1.
Table 1
| Battery sample | Puncture experiment |
| S1 | It is qualified |
| S2 | It is qualified |
| S3 | It is qualified |
| S4 | It is qualified |
| S5 | It is qualified |
| S6 | It is qualified |
| DS1 | It is unqualified |
The battery that embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5 and embodiment 6 are prepared, does not occur quick-fried
It is fried, also without vigorous combustion；
The battery that comparative example is prepared, battery vigorous combustion, explodes, and puncture does not pass through.
As shown in Figure 1, when carrying out puncturing experiment for above-mentioned 7 batteries, the battery temperature variation diagram that detects；From figure
As can be seen that embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5 and embodiment 6 are in puncturing experimentation, it is electric
Pond temperature changes with time more slowly, and will not rise to too high temperature；And comparative example is in puncturing experimentation,
Battery temperature, which changes over time, to be ramping up, and reaches 600 DEG C or more of high temperature.This is because：
When draw point is passed through full of battery under electricity condition, since draw point is electronic conductor and is in direct contact positive and negative anodes, cause pair
Internal short-circuit occurs for battery in ratio, and the short time discharges heat, discharges fuel gas, and diaphragm retracts, positive and negative anodes come into contact in a large area,
Cause thermal runaway；And in embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5 and embodiment 6, due in electrolyte
Added with PEO-PPO-PEO, when draw point causes internal short-circuit heat production across battery, PEO-PPO-PEO can be preferentially strong with PF5 etc.
Lewis acid and solvent reaction generate jelly and are covered in positive and negative pole surface（As shown in Figures 2 and 3）, Fig. 2 is comparative example
SEM schemes, the SEM figures of Fig. 3 embodiments 3；By the comparison of Fig. 2 and Fig. 3 it is found that the SEM figures of Fig. 2 comparative examples, molecular structure are more fluffy
Pine, and there are more larger gaps；And the SEM figures of Fig. 3 embodiments 3, since surface forms jelly, and it is covered in
Surface, thus it is dense.Fig. 2 and Fig. 3 show that loose porous shape is presented in the pole piece of Fig. 2 comparative examples, with electrolyte
Contact area is very big, when internal temperature of battery increases, can aggravate the rate that electrolyte is aoxidized, to accelerate the heat of battery core
It is out of control；And the pole piece of Fig. 3 embodiments 3 completely cuts off its contact between electrolyte there are one layer of flat covering, to
The rate that compacting electrolyte is aoxidized, alleviates the thermal runaway of battery, increases the internal resistance of cell, prevents subsequent positive and negative anodes from directly connecing
It touches, while the burning point higher of PEO-PPO-PEO, is not easy to be ignited, it is safer.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (11)
1. a kind of lithium-ion battery electrolytes, including lithium salts, additive and organic solvent, which is characterized in that the additive is
Polyethylene glycol propylene glycol-polyethylene glycol.
2. lithium-ion battery electrolytes according to claim 1, which is characterized in that on the basis of the total volume of electrolyte,
Include the additive that percent by volume is 0.5%-20% in the electrolyte.
3. lithium-ion battery electrolytes according to claim 1, which is characterized in that the average molecular weight of the additive is
1800-10000。
4. lithium-ion battery electrolytes according to claim 1, which is characterized in that the lithium salts is selected from LiPF6、LiBOB、
One or more of LiTFSI or LiFSI.
5. lithium-ion battery electrolytes according to claim 1 or 4, which is characterized in that the lithium salts it is a concentration of
0.5mol/L-3mol/L。
6. lithium-ion battery electrolytes according to claim 1, which is characterized in that the organic solvent is selected from cyclic carbonate
One or more of ester or linear carbonate.
7. lithium-ion battery electrolytes according to claim 6, which is characterized in that the cyclic carbonate is ethylene carbonate
Ester and/or propene carbonate；The linear carbonate is selected from dimethyl carbonate, diethyl carbonate, dipropyl carbonate or carbonic acid first
One or more of base ethyl ester.
8. lithium-ion battery electrolytes according to claim 6, which is characterized in that the organic solvent is ethylene carbonate
The mixed solution of fat, diethyl carbonate and methyl ethyl ester composition, the ethylene carbonate, diethyl carbonate and carbonic acid first
The volume ratio of base ethyl ester is 1:1:1.
9. lithium-ion battery electrolytes according to claim 1, which is characterized in that in the electrolyte also contain cathode at
Film additive contains the cathode film formation that mass percent is 0.5%-2% on the basis of the gross mass of electrolyte in the electrolyte
Additive.
10. lithium-ion battery electrolytes according to claim 9, which is characterized in that the cathode film formation additive is carbon
Sour Asia ethylene fat or fluoro ethylene carbonate.
11. a kind of battery, including shell, the pole piece and electrolyte that are contained in the shell, which is characterized in that the electrolysis
Liquid is the lithium-ion battery electrolytes described in claim 1-10 any one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710204908.8A CN108666616A (en) | 2017-03-31 | 2017-03-31 | A kind of lithium-ion battery electrolytes and battery |
| PCT/CN2018/071515 WO2018176981A1 (en) | 2017-03-31 | 2018-01-05 | Electrolyte solution for lithium ion battery, and battery |
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| CN201710204908.8A CN108666616A (en) | 2017-03-31 | 2017-03-31 | A kind of lithium-ion battery electrolytes and battery |
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| CN109585922A (en) * | 2018-12-06 | 2019-04-05 | 清远佳致新材料研究院有限公司 | Application and high-voltage lithium ion batteries of the compound of hydroxyl in high-voltage lithium ion batteries |
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| CN112018445A (en) * | 2020-07-17 | 2020-12-01 | 清华大学 | Self-destruction structure, electrolyte, electrode, diaphragm and battery |
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| CN109585922A (en) * | 2018-12-06 | 2019-04-05 | 清远佳致新材料研究院有限公司 | Application and high-voltage lithium ion batteries of the compound of hydroxyl in high-voltage lithium ion batteries |
| CN109671981A (en) * | 2018-12-19 | 2019-04-23 | 清远佳致新材料研究院有限公司 | The application of polyurethane and/or polyoxypropyleneglycol, electrolyte, battery cathode, battery diaphragm, battery, electric vehicle |
| CN109818057A (en) * | 2019-01-02 | 2019-05-28 | 北京泰丰先行新能源科技有限公司 | Lithium metal secondary battery electrolyte and the lithium metal secondary battery for using the electrolyte |
| CN112018445A (en) * | 2020-07-17 | 2020-12-01 | 清华大学 | Self-destruction structure, electrolyte, electrode, diaphragm and battery |
| CN112018390A (en) * | 2020-07-17 | 2020-12-01 | 清华大学 | Sandwich electrode and battery |
| CN112018390B (en) * | 2020-07-17 | 2021-09-14 | 清华大学 | Sandwich electrode and battery |
| CN118213622A (en) * | 2024-03-14 | 2024-06-18 | 铁塔能源有限公司 | Electrolyte, preparation method thereof and battery |
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| Publication number | Publication date |
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| WO2018176981A1 (en) | 2018-10-04 |
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