CN109659609A - A kind of long circulating lithium-ion electrolyte and battery - Google Patents
A kind of long circulating lithium-ion electrolyte and battery Download PDFInfo
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- CN109659609A CN109659609A CN201811423650.1A CN201811423650A CN109659609A CN 109659609 A CN109659609 A CN 109659609A CN 201811423650 A CN201811423650 A CN 201811423650A CN 109659609 A CN109659609 A CN 109659609A
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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
- H01M10/05—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
- H01M10/0568—Liquid materials characterised by the solutes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0569—Liquid materials characterised by the solvents
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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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
- H01M2300/0028—Organic electrolyte characterised by the solvent
- H01M2300/0037—Mixture of solvents
- H01M2300/004—Three solvents
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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
Abstract
The present invention relates to a kind of long circulating lithium-ion electrolyte and batteries, it is characterised in that: as follows including raw material and its weight ratio: mixing lithium salts 13 ~ 15%, 1 ~ 7% part of additive, organic solvent 75 ~ 80%；Raw material is prepared into growth cycles lithium ion through cooling, stirring sufficiently dissolution, mixing, reaction in a mixer by processing step；Wherein, the additive is sulfuric acid vinylene DTD, vinylene carbonate VC, three (trimethyl silicon substrate) phosphorus TMSP；The mixing lithium salts is lithium hexafluoro phosphate LiPF6, double fluorine Huang imide li LiFSI, difluorine oxalic acid boracic acid lithium LiDFOB；The organic solvent is ethylene carbonate EC, methyl ethyl carbonate EMC, diethyl carbonate DEC；The electrolyte passes through mixing lithium salts and additive, organic solvent synergistic effect, generate the stability and security performance, cycle performance effect for being obviously improved its electrolyte, the lithium ion battery made of long circulating lithium-ion electrolyte makes battery be able to maintain good cycle performance and higher capacity retention ratio.
Description
Technical field
The invention belongs to novel energy-storing fields, are related to long circulating ternary material system lithium-ion battery electrolytes preparation skill
Art is particularly suitable for a kind of long circulation life lithium-ion-power cell of sustainable charge and discharge, follows more particularly to a kind of length
Ring lithium-ion electrolyte and battery.
Background technique
Currently, lithium ion battery is widely used on laptop and electric tool, pursuit of the market to its capacity
Except, to the proposition requirements at the higher level of its cycle performance, i.e., the cycle performance of the capacity retention ratio after multiple charge and discharge cycles is wanted
Ask higher and higher.
In the prior art, cycle performance, achievement are improved by all multimodes such as material modification, optimization inside battery structures
It is striking；But as the durability of electrical equipment is continuously improved, the increasingly promotion that battery core cycle performance is required in face of client, phosphoric acid
The cycle-index of iron lithium and ternary system battery core can no longer meet customer demand, by way of improving cycle performance above still
So it cannot meet the needs.
Therefore, professional attempts the design of the type and its mass percent by improving electrolysis additive, improves
The cycle performance of battery solves the problems, such as that existing inexpensive battery life is not mostly long.
Summary of the invention
The problem to be solved in the present invention is that the cycle performance of existing mobile electric tool capacity retention ratio has been unable to satisfy visitor
The problem of family demand, provides a kind of long circulating lithium-ion electrolyte and battery, passes through mixing lithium salts, organic solvent, additive, warp
Electrolyte is made in cooling, stirring sufficiently dissolution, mixing, reaction, mixes lithium salts and additive collaboration generates preferably improves circulation
Performance effect makes tertiary cathode material battery have excellent long circulating performance, high-temperature storage performance, low temperature performance and peace
Full performance.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of long circulating lithium-ion electrolyte, it is special
Sign is, mixes lithium salts 13 ~ 15%, 1 ~ 7% part of additive, organic solvent 75 ~ 80%；In a mixer by processing step by raw material
Growth cycles lithium-ion electrolyte is prepared through cooling, stirring sufficiently dissolution, mixing, reaction；
Wherein, the additive is sulfuric acid vinylene DTD, in vinylene carbonate VC, three (trimethyl silicon substrate) phosphorus TMSP
Two or more；
The mixing lithium salts is lithium hexafluoro phosphate LiPF6, double fluorine Huang imide li LiFSI, difluorine oxalic acid boracic acid lithium LiDFOB
Two or more；
The organic solvent is ethylene carbonate EC, methyl ethyl carbonate EMC, diethyl carbonate DEC.
Preferably, the sulfuric acid vinylene DTD of the additive, vinylene carbonate VC, three (trimethyl silicon substrate) phosphorus
The weight ratio of TMSP in the electrolytic solution is respectively 1 ~ 3%.
Preferably, lithium hexafluoro phosphate LiPF6, the double fluorine Huang imide li LiFSI, difluoro oxalate of the mixing lithium salts
The weight ratio of lithium borate LiDFOB in the electrolytic solution is 13 ~ 14%, 1.3 ~ 1.5%, 0.5 ~ 3% respectively.
Preferably, the ethylene carbonate EC of the organic solvent, methyl ethyl carbonate EMC, diethyl carbonate DEC are being electrolysed
Weight ratio in liquid is respectively 20 ~ 15%, 40 ~ 45%, 15 ~ 20%.
A kind of lithium ion battery of long circulating lithium-ion electrolyte preparation, it is characterised in that: the long circulating lithium-ion electric
Solution liquid, which is injected into artificial graphite/LifePO4 battery, is made lithium ion battery.
The advantages and positive effects of the present invention are:
1, long circulating lithium-ion electrolyte of the present invention is improved using mixing lithium salts LiPF6, LiFSI, LiDFOB and additive
The thermal decomposition temperature and flame retardant property of electrolyte, the stability and security performance of electrolyte are further improved, and make its note
The lithium-ion-power cell of fluid-tight dress adapts to long circulating charge-discharge power demand, is discharged under constant current with 0.5C charging/0.5C, from
4.2 V of 3.0V carries out charge and discharge cycles test；The cycle performance of battery is significantly improved, is held up to 3000 times or more circulations
Measure holding Shuai≤80% or more.
2, long circulating lithium-ion electrolyte of the present invention is used due to being mixed into mixing lithium salts, lithium hexafluoro phosphate in electrolyte
LiPF6, double fluorine Huang imide li LiFSI, difluorine oxalic acid boracic acid lithium LiDFOB, organic solvent and the additive of addition are all tools
There is elastomeric component, the cohesive force and toughness of SEI film can be increased, enables to adapt to lithium electrode form in charge and discharge process
Variation.
3, long circulating lithium-ion electrolyte of the present invention, which is used, has synergistic effect due to being mixed into mixing lithium salts in electrolyte, adds
Entering double fluorine Huang imide li LiFSI can keep compared with high heat stability, and with higher in the carbonate-based solvent of low-k
Dissolution, double fluorine Huang imide li LiFSI conductivity are high, water-sensitive sensitivity is low and thermal stability is good, and double fluorine Huang imide lis are added
The carbonic ester electrolyte of LiFSI all has higher conductivity at -50-50 DEG C, and the lithium transport number of the system is higher at room temperature, mentions
The cycle performance of electrolyte is risen；Difluorine oxalic acid boracic acid lithium LiDFOB good film-forming property, low temperature performance well is added, has with anode
Fine compatibility can form one layer of passivating film on Al foil surface, and inhibit electrolyte oxidation；The addition of lithium salts LiDFOB, LiFSI
The decomposition of LiPF6 can be effectively suppressed in collaboration, so that battery be enable to obtain preferable cycle efficieny.
4, long circulating lithium-ion electrolyte of the present invention uses and is mixed into additive in lithium salt electrolyte, sulfuric acid vinylene DTD,
Synergistic effect is generated in vinylene carbonate VC, three (trimethyl silicon substrate) phosphorus TMSP combination addition electrolyte, lithium electrode is higher
Discharge rate under, be formed on its surface very smooth, even compact SEI film；Make electrode after addition sulfuric acid vinylene DTD
Degree of polarization reduces, to form stable SEI film in electrode surface, reduces the resistance of electrode process Li migration, is conducive to
Can removal lithium embedded process progress, improve battery be continuously circulated ability under charge-discharge magnification；Add three (trimethyl silicon substrate) phosphorus
TMSP makes lithium-ion electrolyte have wider liquid journey, lower viscosity, while vinylene carbonate VC, three (trimethyl silicon substrates)
Phosphorus TMSP additive improves its cyclical stability for Li/ graphite cell, so that the long circulating performance of battery is improved, so that electric
Pond is able to maintain good cycle performance and higher capacity retention ratio.
Detailed description of the invention
Fig. 1 is the discharge capacity curve graph of the rectangular model of long circulating lithium ion battery embodiment one of the present invention；
Fig. 2 is two cylinder model of long circulating lithium ion battery embodiment of the present invention, one discharge capacity curve graph；
Fig. 3 is three cylinder model of long circulating lithium ion battery embodiment of the present invention, two discharge capacity curve graph.
Specific embodiment
Below in conjunction with embodiment and attached drawing, the present invention is described in further detail.
Referring to Fig. 1,2,3, the present invention provides a kind of long circulating lithium-ion electrolyte and lithium ion battery.
Long circulating lithium-ion electrolyte in table 1 is prepared according to raw material and weight ratio, configuration proportion is every with weight ratio
KG is that unit calculates preparation (formula is as follows):
Table 1
| Electrolyte | LiPF6 | LIFSI | LiDFOB | TMSP | EC | EMC | DEC | DTD | VC |
| Implement one | 130 | 10 | 5 | 2 | 250 | 416 | 167 | 10 | 10 |
| Implement two | 130 | 10 | 5 | 2 | 245 | 416 | 167 | 15 | 10 |
| Implement three | 130 | 10 | 5 | 2 | 240 | 416 | 167 | 20 | 10 |
Embodiment one:
1, the preparation of long circulating lithium-ion electrolyte
1) organic solvent is preprocessed, rectifying (or dehydration, alcohol), homogeneous, and after detecting qualification, sequentially passes through weight
EC:250g, EMC:416g, DEC:167g is added in proportion；
2) cooling system of blender and mixer is started while injecting organic solvent；
3) refined lithium salt is after detection is qualified, and mixer is added in addition LiPF6:130g, LiFSI:10g by weight ratio；
4) additive is preprocessed and after detecting qualification, sequentially adds weight proportion DTD:10g, VC:10g, TMSP:2
Enter mixer；
5) raw material is configured to composite electrolyte in a mixer through sufficiently dissolution, mixing, reaction, and after detection is qualified, product is filled
Dress weighing storage.
2, long circulating lithium ion battery and performance test
1) the prepared long circulating lithium-ion electrolyte of this example one is added in rectangular cell 20Ah model and is fabricated to lithium ion
Battery tests its charge-discharge performance index using secondary lithium battery device for detecting performance.
2) lithium ion battery is made using the long circulating lithium-ion electrolyte of the present embodiment one, test multiplying power discharging property is such as
Under:
(1) test temperature: 25 DEG C ± 3 DEG C；
(2) charging modes: 20A (0.5C) constant-current constant-voltage charging to 4.2V, cut-off current 0.05C (mA) is used；
(3) discharge mode: 20A (0.5C) constant-current discharge to 3.0V is used；
(4) it cycle-index: repeats above-mentioned circulation system 3500 weeks, Rong amount holding Shuai≤80% or more.
As shown in Figure 1, the lithium ion battery of one electrolyte of example preparation is prepared using the present invention, is discharged under different conservation rates
The curve graph of capacity shows to greatly improve its discharge cycle performance, and due in combined additive electrolyte, lithium electrode is
Make under higher discharge rate, can also form very smooth, even compact SEI film on its surface；This is mainly due to electricity
The additive for solving lithium salts, organic main solvent and addition in liquid is all to have elastomeric component, can increase the cohesive force of SEI film
And toughness, enable the variation for adapting to lithium electrode form in charge and discharge process, while double fluorine Huang imide li LiFSI can be kept
Thermostabilization is to 180 DEG C, and the solubility with higher in the carbonate-based solvent of low-k；Compared to lithium hexafluoro phosphate
The carbonic ester electrolyte of LiPF6 system, double fluorine Huang imide li LiFSI all has higher conductivity, room temperature at -50 ~ 50 DEG C
The lithium transport number of the lower system is up to 0.5 ~ 0.6, so that battery be enable to obtain preferable cycle efficieny；Difluoro oxalate boron simultaneously
Sour lithium LiDFOB good film-forming property, low temperature performance well, have fine compatibility with anode；One layer of passivation can be formed on Al foil surface
Film, and inhibit electrolyte oxidation；Double fluorine Huang imide li LiFSI conductivity are high, water-sensitive sensitivity is low and thermal stability is good, two lithium
The decomposition of lithium hexafluoro phosphate LiPF6, the cycle performance of Lai Tisheng electrolyte can be effectively suppressed in the addition of salt.
Embodiment two:
1, the preparation of long circulating lithium-ion electrolyte
1) organic solvent is preprocessed, rectifying (or dehydration, alcohol), homogeneous, and after detecting qualification, sequentially passes through weight
EC:245g, EMC:416g, DEC:167g is added in proportion；
2) cooling system of blender and mixer is started while injecting organic solvent；
3) refined lithium salt is after detection is qualified, and mixer is added in addition LiPF6:130g, LiFSI:10g by weight ratio；
4) additive is preprocessed and after detecting qualification, sequentially adds weight proportion DTD:15g, VC:10g, TMSP:2
Enter mixer；
5) raw material is configured to composite electrolyte in a mixer through sufficiently dissolution, mixing, reaction, after detection is qualified, product
Filling weighing storage.
2, long circulating lithium ion battery and performance test
1) the prepared long circulating lithium-ion electrolyte system of this example two is added in one product of cylinder 18650-2200mAh model
It is made lithium ion battery, using secondary lithium battery device for detecting performance, tests its charge-discharge performance index.
2) lithium ion battery is made using the long circulating lithium-ion electrolyte of the present embodiment two, test multiplying power discharging property is such as
Under:
(1) test temperature: 25 DEG C ± 3 DEG C；
(2) charging modes: 1100mAh (0.5C) constant-current constant-voltage charging to 4.2V, cut-off current 0.05C (mA) is used；
(3) discharge mode: 1100mAh (0.5C) constant-current discharge to 3.0V is used；
(4) it cycle-index: repeats above-mentioned circulation system 3000 weeks, Rong amount holding Shuai≤80% or more.
By Fig. 1,2 it is found that the lithium ion battery of 21 electrolyte of example preparation is prepared using the present invention, under different conservation rates
The curve graph of discharge capacity shows have long circulating charging and discharging capabilities, and effectively increases electrolyte in the pure ternary of NMC() in
Structural stability adds ionic liquid and multiplying power additive in the electrolytic solution, while assisting membrane technique, collector and tab skill
Art, realization charge-discharge magnification can recycle for a long time, improve battery and are continuously circulated ability under charge-discharge magnification, while arranging in pairs or groups with first
Ethyl triethoxy silicane alkane TMSP is that the system electrolyte of lithium-ion electrolyte solvent has wider liquid journey, is electrolysed than carbonates
Liquid has lower viscosity, and when TMSP is separately as solvent, LiFSI all has preferable compatible with common negative electrode material
Property, electrolyte can issue raw reduction reaction in lower current potential and generate effective SEI film, so that battery is able to maintain good circulation
Performance and higher capacity retention ratio.
Embodiment three:
1, the preparation of long circulating lithium-ion electrolyte
1) organic solvent is preprocessed, rectifying (or dehydration, alcohol), homogeneous, and after detecting qualification, sequentially passes through weight
EC:240g, EMC:416g, DEC:167g is added in proportion；
2) cooling system of blender and mixer is started while injecting organic solvent；
3) refined lithium salt is after detection is qualified, and mixer is added in addition LiPF6:130g, LiFSI:10g by weight ratio；
4) additive is preprocessed and after detecting qualification, sequentially adds weight proportion DTD:20g, VC:10g, TMSP:2
Enter mixer；
5) raw material is configured to composite electrolyte in a mixer through sufficiently dissolution, mixing, reaction, after detection is qualified, product
Filling weighing storage.
2, long circulating lithium ion battery and performance test
1) the prepared long circulating lithium-ion electrolyte of this example 31 is added in two product of cylinder 18650-2200mAh model
It is fabricated to lithium ion battery, using secondary lithium battery device for detecting performance, tests its charge-discharge performance index.
2) lithium ion battery is made using the long circulating lithium-ion electrolyte of the present embodiment three, test multiplying power discharging property is such as
Under:
(1) test temperature: 25 DEG C ± 3 DEG C；
(2) charging modes: 1100mAh (0.5C) constant-current constant-voltage charging to 4.2V, cut-off current 0.05C (mA) is used；
(3) discharge mode: 1100mAh (0.5C) constant-current discharge to 3.0V is used；
(4) it cycle-index: repeats above-mentioned circulation system 3000 weeks, Rong amount holding Shuai≤80% or more.
From the figure 3, it may be seen that using the lithium ion battery for preparing the preparation of one electrolyte of example using the present invention, under different conservation rates
The curve graph of discharge capacity reduces from circulation the results show that introducing electrode polarization degree after 1.5% sulfuric acid vinylene DTD, from
And stable SEI film is formed in electrode surface, reduce electrode process Li migration resistance, be conducive to can removal lithium embedded process into
Row improves battery and is continuously circulated ability under charge-discharge magnification, and methyltriethoxysilane TMSP additive is for Li/ graphite electricity
Pond improves its cyclical stability and for the first time coulombic efficiency；The coulombic efficiency for adding vinylene carbonate VC is 92.9%, slightly lower
Coulombic efficiency is attributed to the electrochemical reduction of vinylene carbonate VC, and adds the library of 2.0% methyltriethoxysilane TMSP
Human relations efficiency is up to 95.2%；For cycle performance after the circle of circulation 2000,2.0% TMSP of addition is 96.8%；Three ethoxy of methyl
Coulombic efficiency can mitigate the amount of positive electrode in LiBs to base silane TMSP high for the first time, to improve the long circulating performance of battery.
Above-described embodiment one, two, three is the performance of the preparation of long circulating lithium-ion electrolyte and lithium ion battery and progress
Test carries out specific implementation of the invention on the basis of embodiment, not does any restrictions to the present invention；Above to of the invention
Embodiment is described in detail, but content is only the preferred embodiment of the present invention, should not be construed as limiting this hair
Bright practical range.All changes and improvements made in accordance with the scope of the present invention are same, should still belong to this patent and cover model
Within enclosing.
Claims (5)
1. a kind of long circulating lithium-ion electrolyte, it is characterised in that: as follows including raw material and its weight ratio: mixing lithium salts 13 ~
15%, 1 ~ 7% part of additive, organic solvent 75 ~ 80%；Raw material is sufficiently molten through cooling, stirring in a mixer by processing step
Growth cycles lithium-ion electrolyte is prepared in solution, mixing, reaction；
Wherein, the additive is sulfuric acid vinylene DTD, in vinylene carbonate VC, three (trimethyl silicon substrate) phosphorus TMSP
Two or more；
The mixing lithium salts is lithium hexafluoro phosphate LiPF6, double fluorine Huang imide li LiFSI, difluorine oxalic acid boracic acid lithium LiDFOB
Two or more；
The organic solvent is ethylene carbonate EC, methyl ethyl carbonate EMC, diethyl carbonate DEC.
2. a kind of long circulating lithium-ion electrolyte according to claim 1, it is characterised in that: the sulfuric acid of the additive is sub-
Vinyl acetate DTD, vinylene carbonate VC, three weight ratios of (trimethyl silicon substrate) phosphorus TMSP in the electrolytic solution are respectively 1 ~ 3%.
3. a kind of long circulating lithium-ion electrolyte according to claim 1, it is characterised in that: the hexafluoro of the mixing lithium salts
Lithium phosphate LiPF6, double fluorine Huang imide li LiFSI, the weight ratio of difluorine oxalic acid boracic acid lithium LiDFOB in the electrolytic solution are respectively
13~14%、1.3~1.5%、0.5~3%。
4. a kind of long circulating lithium-ion electrolyte according to claim 1, it is characterised in that: the carbonic acid of the organic solvent
Vinyl acetate EC, methyl ethyl carbonate EMC, the weight ratio of diethyl carbonate DEC in the electrolytic solution be respectively 20 ~ 15%, 40 ~ 45%, 15 ~
20%。
5. a kind of lithium ion battery of long circulating lithium-ion electrolyte preparation according to claim 4, it is characterised in that: institute
It states long circulating lithium-ion electrolyte and is injected into artificial graphite/LifePO4 battery and lithium ion battery is made.
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| JPWO2021106298A1 (en) * | 2019-11-29 | 2021-06-03 | ||
| WO2021106298A1 (en) * | 2019-11-29 | 2021-06-03 | 日本碍子株式会社 | Lithium secondary battery |
| JP7253076B2 (en) | 2019-11-29 | 2023-04-05 | 日本碍子株式会社 | lithium secondary battery |
| CN110993935A (en) * | 2019-12-02 | 2020-04-10 | 湖北融通高科先进材料有限公司 | Ternary lithium ion battery and preparation method thereof |
| CN111769330A (en) * | 2020-03-31 | 2020-10-13 | 中国科学院过程工程研究所 | Preparation and performance research of high-temperature electrolyte matched with lithium iron phosphate battery |
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