CN112271335A - Electrolyte of lithium ion battery suitable for high-nickel cathode material and lithium ion battery - Google Patents
Electrolyte of lithium ion battery suitable for high-nickel cathode material and lithium ion battery Download PDFInfo
- Publication number
- CN112271335A CN112271335A CN202011265621.4A CN202011265621A CN112271335A CN 112271335 A CN112271335 A CN 112271335A CN 202011265621 A CN202011265621 A CN 202011265621A CN 112271335 A CN112271335 A CN 112271335A
- Authority
- CN
- China
- Prior art keywords
- electrolyte
- lithium ion
- ion battery
- carbonate
- unsubstituted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention belongs to the field of electrolyte, and particularly relates to electrolyte suitable for a lithium ion battery of a high-nickel anode material, wherein the electrolyte contains an additive accounting for 0.1-3% of the total weight of the electrolyte, R1 and R2 are respectively and independently selected from-H, -F, cyano, fluorine substituted or unsubstituted C2-C6 alkyl, fluorine substituted or unsubstituted C2-C6 alkenyl, fluorine substituted or unsubstituted C2-C6 alkynyl, fluorine substituted or unsubstituted C2-C6 alkoxy, fluorine substituted or unsubstituted C2-C6 amino, fluorine substituted or unsubstituted C6-C12 aryl and fluorine substituted or unsubstituted C5-C12 heterocyclic group, and the electrolyte can improve the high and low temperature storage and cycle performances of the electrolyte of the high-nickel lithium ion battery, and simultaneously discloses the lithium ion battery.
Description
Technical Field
The invention relates to the field of electrolyte, in particular to electrolyte of a lithium ion battery suitable for a high-nickel anode material and the lithium ion battery.
Background
The high-nickel ternary (Ni is more than or equal to 85 percent) lithium ion battery has poor high-temperature performance, and is easy to generate gas in the circulating process of high temperature storage at 60 ℃ and high temperature circulation at 45 ℃, so that the safety performance and the service life of the battery are influenced.
CN201910169541.X discloses a ternary lithium ion battery non-aqueous electrolyte and a high-nickel ternary lithium ion battery containing the electrolyte. The electrolyte of the ternary lithium ion battery comprises electrolyte lithium salt, a non-aqueous organic solvent and a film forming additive. The film forming additive comprises a compound. The compound is straight-chain or straight-chain ester, which contains or does not contain F substituent, the compound is an additive which can form a layer of uniform and compact protective film on the surface of a ternary material, the oxidation reaction of electrolyte on the surface of a battery material is reduced, the formed SEI film is stable and compact, the increase of alternating current impedance of the battery in the circulating process is reduced, the circulating performance of the battery is improved, the HOMO energy of the compound is slightly higher than that of ethylene carbonate, so that the ethylene carbonate is oxidized and decomposed on the surface of a positive electrode in advance, the decomposition reaction of an electrolyte solvent is inhibited, and the compound has a positive effect of improving the circulating performance of an NCM/graphite battery at the high temperature of 45 ℃.
CN201810956297.7 discloses a high-nickel ternary lithium ion battery non-aqueous electrolyte and a high-nickel ternary lithium ion battery containing the electrolyte, and relates to the technical field of lithium ion batteries. The high-nickel ternary lithium ion battery electrolyte comprises electrolyte lithium salt, a non-aqueous organic solvent and a film-forming additive. The film forming additive contains vinyl sulfate and phosphate compounds, and optionally, the film forming additive can also contain a conventional negative electrode film forming additive. At least one substituent in the phosphate compound is a halogenated group; the phosphate additive in the invention can form a protective film on the surface of the anode material, thereby avoiding the generation of cracks in NCM particles in the circulation process, reducing the dissolution of transition metal elements at high temperature, and improving the normal-temperature circulation performance, high-temperature circulation performance and high-temperature storage performance of the battery.
High nickel positive electrode materials are widely used, but electrolyte materials that improve the high and low temperature performance of high nickel positive electrode materials have been studied.
The technical problem solved by the scheme is as follows: how to develop other electrolyte additives and electrolytes suitable for high-nickel cathode materials.
Disclosure of Invention
The invention aims to provide an electrolyte of a lithium ion battery suitable for a high-nickel cathode material, which contains an additive shown as a formula 1, can improve the storage and cycle performance of the electrolyte at high and low temperatures, and also discloses the lithium ion battery.
Unless otherwise specified, all the% and parts in the present invention are weight percentages and parts, and M represents mol/L.
In order to achieve the purpose, the invention provides the following technical scheme:
an electrolyte for a lithium ion battery suitable for a high-nickel cathode material, wherein the electrolyte contains 0.1-3% of additives by weight of the total weight of the electrolyte;
the additive is specifically of the structure of formula 1 below:
wherein R1 and R2 are respectively and independently selected from-H, -F, cyano, fluorine substituted or unsubstituted C2-C6 alkyl, fluorine substituted or unsubstituted C2-C6 alkenyl, fluorine substituted or unsubstituted C2-C6 alkynyl, fluorine substituted or unsubstituted C2-C6 alkoxy, fluorine substituted or unsubstituted C2-C6 amino, fluorine substituted or unsubstituted C6-C12 aryl and fluorine substituted or unsubstituted C5-C12 heterocyclic group.
In the electrolyte of the lithium ion battery suitable for the high-nickel cathode material, the additive is one or more of the following additives:
in the above electrolyte solution suitable for the lithium ion battery with the high nickel cathode material, the electrolyte solution is a carbonate-based electrolyte solution.
In the electrolyte of the lithium ion battery suitable for the high-nickel cathode material, the carbonate solvent in the carbonate-based electrolyte accounts for 74.5-87.5% of the total weight of the electrolyte.
In the electrolyte of the lithium ion battery suitable for the high-nickel cathode material, the electrolyte is a mixed solvent system formed by mixing propylene carbonate and one or more of ethylene carbonate, ethyl methyl carbonate, dimethyl carbonate and diethyl carbonate.
In the electrolyte of the lithium ion battery suitable for the high-nickel cathode material, the electrolyte is one or a combination of several of lithium hexafluorophosphate, lithium bis (oxalato) borate, lithium bis (fluorosulfonyl) imide and lithium bis (trifluoromethylsulfonyl) imide, and the lithium salt accounts for 10% -15% of the total weight of the electrolyte, and more preferably, the electrolyte is lithium hexafluorophosphate with the concentration of 1-1.2M.
The electrolyte of the lithium ion battery suitable for the high-nickel cathode material further comprises an auxiliary additive, wherein the auxiliary additive is one or a combination of more of Vinylene Carbonate (VC), fluoroethylene carbonate (FEC), 1, 3-Propane Sultone (PS) and LiFSI, and the Vinylene Carbonate (VC), the fluoroethylene carbonate (FEC), the 1, 3-Propane Sultone (PS) and the LiFSI respectively account for 0-3% of the total amount of the electrolyte.
In the above electrolyte solution suitable for the lithium ion battery of the high nickel cathode material, Vinylene Carbonate (VC), fluoroethylene carbonate (FEC), 1, 3-Propane Sultone (PS), and LiFSI account for 0.5%, 1.5%, 1%, and 1% of the total amount of the electrolyte solution, respectively.
Meanwhile, the invention also discloses a lithium ion battery which comprises an anode, a cathode, a diaphragm and the electrolyte, wherein the active substance of the anode is a ternary nickel-cobalt-lithium material, and the content of nickel in the active substance of the anode is not lower than 85%.
In the lithium ion battery, the negative electrode is one of graphite and silicon carbon.
Compared with the prior art, the invention has the beneficial effects that:
the imidazole covalent compound with the dicyano substituent is used as an additive for improving the high-temperature and low-temperature circulation and storage performance of the electrolyte, and compared with other homologous compounds, the high-temperature and low-temperature storage and circulation performance of the electrolyte is obviously improved.
Drawings
FIG. 1 is a graph comparing the low temperature performance of example 4 of the present invention and comparative example 1;
FIG. 2 is a graph comparing the high temperature performance of example 4 of the present invention and comparative example 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The preparation method of the high-nickel ternary (Ni is more than or equal to 85%) lithium ion battery comprises the following steps:
and determining the coating surface density according to the capacity design (2000mAh) of the battery and the capacities of the anode and cathode materials. The positive active substance is a high-nickel ternary (Ni is more than or equal to 85%) material purchased from Guizhou Zhenhua or Shenzhenbei; the negative active material is artificial graphite purchased from Shenzhen fenofibrate; the diaphragm is a PE coated ceramic diaphragm which is purchased from a star source material and has the thickness of 20 mu m;
the preparation steps of the anode are as follows: mixing a high-nickel ternary material, conductive carbon black and a binder polyvinylidene fluoride according to a mass ratio of 96.8:2.0:1.2, dispersing in N-methyl-2-pyrrolidone to obtain anode slurry, uniformly coating the anode slurry on two sides of an aluminum foil, drying, rolling and vacuum drying, and welding an aluminum anode lug by using an ultrasonic welding machine to obtain an anode sheet with the thickness of 100-150 mu m;
the preparation steps of the negative electrode are as follows: mixing graphite, conductive carbon black, binder styrene butadiene rubber and carboxymethyl cellulose according to a mass ratio of 95:1.5:1.5:2, dispersing in deionized water to obtain negative electrode slurry, coating the negative electrode slurry on two sides of a copper foil, drying, rolling and vacuum drying, and welding nickel negative electrode lugs by using an ultrasonic welding machine to obtain a negative electrode sheet with the thickness of 100-150 mu m;
the high-nickel ternary (Ni is more than or equal to 85%) lithium ion battery assembly steps are as follows: and winding the positive pole piece, the negative pole piece and the PE ceramic diaphragm to obtain a battery core, placing the battery core into an aluminum plastic film for packaging, drying, injecting an electrolyte for sealing, standing, forming, secondary sealing, capacity grading and the like to obtain the lithium ion battery.
Preparing an electrolyte: in a glove box filled with argon, Ethylene Carbonate (EC), diethyl carbonate (DEC) and dimethyl carbonate (EMC) were mixed in the weight ratio EC: DEC: EMC (electro magnetic compatibility) is mixed in a ratio of 1:1:1, the mass percentage of a solvent is 74.5% -87.5% of the total mass of the electrolyte, lithium hexafluorophosphate is used as a lithium salt, the mass percentage of the lithium hexafluorophosphate is 12.5% (1mol/L) of the total mass of the electrolyte, and 0-3% of VC, 0-4% of FEC, 0-3% of PS and 0-3% of LiFSI are added. Additives were added to the electrolyte composition shown in table 1, wherein the additive ratio was a ratio based on the total weight of the electrolyte.
Wherein, the used additives are as follows:
the electrolyte components and additive ratios of the above examples and comparative examples are shown in table 1:
TABLE 1 electrolyte Components and additive ratios
The test method comprises the following steps:
1. cycle performance test of lithium ion battery under high temperature condition
At 45 ℃, the lithium ion battery is charged to a voltage of 4.2V at a constant current of 1C, charged at a constant voltage until the current is 0.05C, then discharged to a voltage of 2.75V at a constant current of 1C, and subjected to a 500-cycle charge-discharge test to detect the discharge capacity of the 500 th cycle.
Capacity retention rate (500 th discharge capacity/first discharge capacity) × 100%.
2. Testing of lithium ion batteries at high temperature storage
Charging the lithium ion battery at a constant current of 1C to a voltage of 4.2V and at a constant voltage of 4.2V to a current of 0.05C at normal temperature, and recording the thickness of the lithium ion battery as H0; then placing the mixture into a 60 ℃ oven for storage for 30 days, taking the mixture out, and testing the thickness, wherein the thickness is recorded as H1; taking out the lithium ion battery, cooling to room temperature, discharging to 2.75V at 1C, and recording the discharge capacity; then, the discharged lithium ion battery was charged at a constant current of 1C to a voltage of 4.2V, at a constant voltage of 4.2V to a current of 0.05C, and discharged at 1C to 2.75V, and the recovery capacity was recorded.
High-temperature storage capacity retention rate (discharge capacity after storage/discharge capacity before storage) × 100%
High temperature storage capacity recovery rate (recovery capacity after storage/discharge capacity before storage) × 100%
Thickness swell ratio (%) - (H1-H0)/H0X 100%
3. Testing of lithium ion batteries at Low temperature
Charging the lithium ion battery at a constant current of 1C to a voltage of 4.2V, at a constant voltage of 4.2V to a current of 0.05C, then discharging at 1C to 2.75V, recording the discharge capacity, and then charging the lithium ion battery at a constant current of 1C to a voltage of 4.2V, at a constant voltage of 4.2V to a current of 0.05C; and then storing the lithium ion battery in a drying oven at the temperature of-20 ℃ for 4h, taking out the lithium ion battery, recovering the lithium ion battery to the room temperature, discharging the lithium ion battery to 2.75V at the temperature of 0.5 ℃, and recording the discharge capacity.
Low temperature discharge capacity retention rate (-20 ℃ low temperature discharge capacity/normal temperature discharge capacity) × 100%
The results of capacity retention at 45 ℃ for 500 cycles and capacity retention, capacity recovery rate and thickness expansion rate at 60 ℃ for 30 days and discharge capacity retention at-20 ℃ at low temperature of the examples and comparative examples are shown in Table 2.
TABLE 2 retention ratio of cyclic capacity, retention ratio of capacity recovery rate, thickness expansion rate and retention ratio of discharge capacity
Fig. 1 shows low-temperature discharge performance of the lithium ion batteries of comparative example 1 and example 4 under the low-temperature condition of-20 ℃, and experimental conditions are as follows: charging a full-charge battery with a constant current and a constant voltage of 1C to 4.2V and a cutoff current of 0.05C, standing in a constant temperature box at the temperature of minus 20 ℃ for 6 hours, discharging to 2.75V with a current of 0.5C, and drawing a low-temperature discharge curve with the discharge capacity as an abscissa and the voltage as an ordinate; fig. 2 shows cycle performance of the lithium ion batteries of comparative example 1 and example 4 under high temperature condition of 45 ℃, and experimental conditions are as follows:
1) charging to 4.2V at a constant current and a constant voltage of 1C, and stopping the current to 0.05C;
2) standing for 5 min;
3) discharging to 2.75V at 1C;
4) standing for 5 min;
5) jumping to the step 1), and circulating for 1000 weeks;
the cycle number was plotted on the abscissa and the capacity retention ratio (discharge capacity corresponding to the number of cycles/discharge capacity at the first cycle) was plotted on the ordinate as a cycle curve.
As seen by examples 1-9: with the increase of the addition amount of the additive A1, 0.1% -3%, under the charge cut-off voltage of 4.2V, the cycle capacity retention rate of 1C at 45 ℃, the high-temperature storage capacity retention rate of 60 ℃ and the high-temperature storage thickness expansion rate of 60 ℃ show the trend of increasing and then decreasing. When the addition amount of the A1 is 0.5%, the performance is best, and when the A1 with the addition amount of 0.5% is compared with a comparison group, the cycle performance at 45 ℃ is obviously superior to that of the comparison group, and the cycle performance is improved by nearly 100%.
As can be seen from examples 10 to 17: the different structural formulas of the additive A can improve the high-temperature cycle performance and the high-temperature storage performance, and have the same effect.
As can be seen from examples 18 to 19: the selection of lithium salts and solvents with different concentrations has little influence on the performance.
As can be seen from examples 20 to 25: the auxiliary additive has little influence on the electrical properties of the battery.
As can be seen from example 4 and comparative examples 2 and 3: when other imidazole additives are adopted, certain contribution is made to the electrical properties, but the electrical effect of the additive of the invention cannot be achieved, and referring to table 2, the properties of comparative examples 2 and 3 are inferior to those of example 4, and particularly, the expansion ratio of comparative example 3 is obviously greater than that of example 4.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The electrolyte of the lithium ion battery suitable for the high-nickel cathode material is characterized by comprising an additive which accounts for 0.1-3% of the total weight of the electrolyte;
the additive is specifically of the structure of formula 1 below:
wherein R1 and R2 are respectively and independently selected from-H, -F, cyano, fluorine substituted or unsubstituted C2-C6 alkyl, fluorine substituted or unsubstituted C2-C6 alkenyl, fluorine substituted or unsubstituted C2-C6 alkynyl, fluorine substituted or unsubstituted C2-C6 alkoxy, fluorine substituted or unsubstituted C2-C6 amino, fluorine substituted or unsubstituted C6-C12 aryl and fluorine substituted or unsubstituted C5-C12 heterocyclic group.
2. The electrolyte solution suitable for a lithium ion battery with a high nickel cathode material according to claim 1, wherein the additive is one or more of the following additives:
3. the electrolyte solution suitable for a lithium ion battery with a high nickel cathode material according to claim 1, wherein the electrolyte solution is a carbonate-based electrolyte solution.
4. The electrolyte for a lithium ion battery suitable for a high-nickel cathode material according to claim 3, wherein the carbonate solvent in the carbonate-based electrolyte accounts for 74.5-87.5% of the total weight of the electrolyte.
5. The electrolyte of the lithium ion battery suitable for the high-nickel cathode material is characterized in that the electrolyte is a mixed solvent system formed by mixing propylene carbonate with one or more of ethylene carbonate, ethyl methyl carbonate, dimethyl carbonate and diethyl carbonate.
6. The electrolyte of the lithium ion battery suitable for the high-nickel cathode material is characterized in that in the electrolyte, the electrolyte is one or a combination of more of lithium hexafluorophosphate, lithium bis (oxalato) borate, lithium bis (fluorosulfonyl) imide and lithium bis (trifluoromethylsulfonyl) imide, and the lithium salt accounts for 10-15% of the total weight of the electrolyte.
7. The electrolyte of the lithium ion battery suitable for the high-nickel cathode material is characterized by further comprising an auxiliary additive, wherein the auxiliary additive is one or more of Vinylene Carbonate (VC), fluoroethylene carbonate (FEC), 1, 3-Propane Sultone (PS) and LiFSI, and the Vinylene Carbonate (VC), the fluoroethylene carbonate (FEC), the 1, 3-Propane Sultone (PS) and the LiFSI respectively account for 0-3% of the total amount of the electrolyte.
8. The electrolyte of the lithium ion battery suitable for the high-nickel cathode material is characterized in that Vinylene Carbonate (VC), fluoroethylene carbonate (FEC), 1, 3-Propane Sultone (PS) and LiFSI respectively account for 0.5%, 1.5%, 1% and 1% of the total amount of the electrolyte.
9. The lithium ion battery is characterized by comprising a positive electrode, a negative electrode, a separator and the electrolyte according to any one of claims 1 to 8, wherein the active material of the positive electrode is a ternary nickel-cobalt-lithium material, and the content of nickel in the active material of the positive electrode is not less than 85%.
10. The lithium ion battery of claim 9, wherein the negative electrode is one of graphite and silicon carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265621.4A CN112271335A (en) | 2020-11-13 | 2020-11-13 | Electrolyte of lithium ion battery suitable for high-nickel cathode material and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265621.4A CN112271335A (en) | 2020-11-13 | 2020-11-13 | Electrolyte of lithium ion battery suitable for high-nickel cathode material and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112271335A true CN112271335A (en) | 2021-01-26 |
Family
ID=74339958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011265621.4A Pending CN112271335A (en) | 2020-11-13 | 2020-11-13 | Electrolyte of lithium ion battery suitable for high-nickel cathode material and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112271335A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114725392A (en) * | 2022-04-26 | 2022-07-08 | 惠州市豪鹏科技有限公司 | Lithium ion battery |
| CN115332632A (en) * | 2022-10-13 | 2022-11-11 | 宁德新能源科技有限公司 | Electrolyte solution, electrochemical device, and electronic apparatus |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130004861A1 (en) * | 2011-06-30 | 2013-01-03 | Jung-Yi Yu | Electrolyte additive for lithium secondary battery, non-aqueous electrolyte, and lithium secondary battery including the same |
| CN103930405A (en) * | 2011-11-14 | 2014-07-16 | 阿克马法国公司 | Method for preparing pentacyclic anion salt |
| CN104584291A (en) * | 2012-07-26 | 2015-04-29 | 丽视股份有限公司 | Sustainable current collectors for lithium batteries |
| US20150315155A1 (en) * | 2008-08-29 | 2015-11-05 | Centre National De La Recherche Scientifique | Five-membered cyclic anion use thereof as an electrolyte |
| CN105518916A (en) * | 2013-09-05 | 2016-04-20 | 阿科玛法国公司 | Additives for improving the ionic conductivity of lithium-ion battery electrodes |
| CN109659615A (en) * | 2018-12-20 | 2019-04-19 | 河南电池研究院有限公司 | Match the lithium-ion battery electrolytes of silicon-carbon cathode material and its battery of preparation |
-
2020
- 2020-11-13 CN CN202011265621.4A patent/CN112271335A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150315155A1 (en) * | 2008-08-29 | 2015-11-05 | Centre National De La Recherche Scientifique | Five-membered cyclic anion use thereof as an electrolyte |
| US20130004861A1 (en) * | 2011-06-30 | 2013-01-03 | Jung-Yi Yu | Electrolyte additive for lithium secondary battery, non-aqueous electrolyte, and lithium secondary battery including the same |
| CN103930405A (en) * | 2011-11-14 | 2014-07-16 | 阿克马法国公司 | Method for preparing pentacyclic anion salt |
| CN104584291A (en) * | 2012-07-26 | 2015-04-29 | 丽视股份有限公司 | Sustainable current collectors for lithium batteries |
| CN105518916A (en) * | 2013-09-05 | 2016-04-20 | 阿科玛法国公司 | Additives for improving the ionic conductivity of lithium-ion battery electrodes |
| CN109659615A (en) * | 2018-12-20 | 2019-04-19 | 河南电池研究院有限公司 | Match the lithium-ion battery electrolytes of silicon-carbon cathode material and its battery of preparation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114725392A (en) * | 2022-04-26 | 2022-07-08 | 惠州市豪鹏科技有限公司 | Lithium ion battery |
| CN115332632A (en) * | 2022-10-13 | 2022-11-11 | 宁德新能源科技有限公司 | Electrolyte solution, electrochemical device, and electronic apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109755635B (en) | Battery electrolyte additive giving consideration to high and low temperature performance, electrolyte and high-nickel ternary lithium ion battery | |
| CN109193029B (en) | High-nickel ternary lithium ion battery non-aqueous electrolyte and high-nickel ternary lithium ion battery containing electrolyte | |
| CN106505249B (en) | Lithium ion battery electrolyte and lithium ion battery containing same | |
| CN109888389B (en) | Ternary lithium ion battery non-aqueous electrolyte and high-nickel ternary lithium ion battery containing electrolyte | |
| CN109873205B (en) | Electrolyte suitable for silicon-carbon cathode and lithium ion battery containing electrolyte | |
| CN111628218B (en) | Lithium ion battery and preparation method thereof | |
| CN109860709B (en) | Electrolyte for improving low-temperature performance of lithium ion battery and lithium ion battery containing electrolyte | |
| CN111244546B (en) | Electrolyte for lithium ion battery suitable for quick charging and lithium ion battery | |
| CN113078354A (en) | Ternary lithium ion battery non-aqueous electrolyte and lithium ion battery thereof | |
| CN109687026B (en) | High-voltage ternary lithium ion battery electrolyte and lithium ion battery containing same | |
| CN111029655A (en) | Lithium ion battery electrolyte and lithium ion battery containing same | |
| CN108987802B (en) | Non-aqueous electrolyte for high-voltage lithium ion battery | |
| CN110911748B (en) | Lithium secondary battery electrolyte and lithium secondary battery | |
| CN111146499B (en) | Lithium ion battery electrolyte and lithium ion battery containing same | |
| CN111106387B (en) | Electrolyte and lithium ion battery | |
| CN111668551A (en) | High-temperature high-pressure electrolyte matched with silicon-carbon negative electrode material lithium ion battery | |
| CN111477959A (en) | Electrolyte additive, electrolyte containing additive and lithium ion battery | |
| CN112271335A (en) | Electrolyte of lithium ion battery suitable for high-nickel cathode material and lithium ion battery | |
| CN110911754A (en) | Lithium ion battery electrolyte and preparation method thereof | |
| CN112290089A (en) | Lithium ion battery non-aqueous electrolyte solution and lithium ion battery | |
| CN114069047A (en) | High-voltage-resistant lithium secondary battery electrolyte and lithium secondary battery | |
| CN115441057A (en) | Electrolyte and battery comprising same | |
| CN113067031B (en) | Electrolyte solution, electrochemical device, and electronic device | |
| CN112510262B (en) | High-temperature lithium ion battery electrolyte and lithium ion battery | |
| CN114464889A (en) | Non-aqueous electrolyte for high-voltage lithium ion battery and lithium ion battery thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210126 |