CN104835983A - Lithium battery electrolyte, preparation method thereof and lithium battery - Google Patents
Lithium battery electrolyte, preparation method thereof and lithium battery Download PDFInfo
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- CN104835983A CN104835983A CN201510244460.3A CN201510244460A CN104835983A CN 104835983 A CN104835983 A CN 104835983A CN 201510244460 A CN201510244460 A CN 201510244460A CN 104835983 A CN104835983 A CN 104835983A
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- lithium battery
- lithium
- organic solvent
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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
-
- 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
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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
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses lithium a battery electrolyte, a preparation method thereof and a lithium battery, wherein the electrolyte comprises lithium hexafluorophosphate, lithium tetrafluoroborate, bistrifluoromethanesulfonimide lithium, chain carbonic ester organic solvent, cyclic carbonate organic solvent, carboxylic acid ester organic solvent, hydroxyethyl cellulose, L-glutamic acid, polyaspartic acid, succinic acid, sodium ethylene diamine tetracetate and deionized water. The stability of the electrolyte is greatly improved, the storage cycle is increased, the recycling frequency of the lithium battery is increased, and the stability of the lithium battery is improved.
Description
Technical field
The present invention relates to technical field of lithium batteries, especially a kind of lithium battery electrolytes and preparation method thereof and lithium battery.
Background technology
Lithium battery by since invention, has had the history of more than 100 year from 1958 so far.Lithium battery has that structure is simple, dependable performance, easy to use, raw material are easy to get and the advantage such as low price, be widely used in the various fields in the national economy such as communications and transportation, communication and national defence, become indispensable energy products in social production and human lives.
Five large parts of lithium battery are positive pole, negative pole, barrier film, electrolyte and battery case, and wherein electrolyte is one of principal element affecting battery performance.Common electrolyte internal resistance is large, Gu sour ability, cycle life are low, useful life is short, stability is low.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of lithium battery electrolytes and preparation method thereof and lithium battery, can significantly improve the cycle-index of lithium battery, is easy to promote the use of.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows.
A kind of lithium battery electrolytes, comprises
The lithium hexafluoro phosphate of 47wt% ~ 53wt%,
The LiBF4 of 0.1wt% ~ 0.3wt%,
The bis trifluoromethyl sulfimide lithium of 0.7wt% ~ 1.5wt%,
The linear carbonate class organic solvent of 0.4wt% ~ 0.7wt%,
The cyclic carbonates organic solvent of 0.5wt% ~ 1.0wt%,
0.05wt% ~ 0.2wt% carboxylic acid esters organic solvent,
The hydroxyethylcellulose of 0.2wt% ~ 0.4wt%,
The Pidolidone of 0.3wt% ~ 0.5wt%,
3wt% ~ 7wt% poly-aspartic-acid,
3wt% ~ 7wt% butanedioic acid,
The sodium ethylene diamine tetracetate of 0.3wt% ~ 0.7wt%,
Surplus is deionized water.
For solving the problem, present invention also offers a kind of preparation method of lithium battery electrolytes, comprising the following steps:
S1, take the lithium hexafluoro phosphate of 47wt% ~ 53wt%, the LiBF4 of 0.1wt% ~ 0.3wt%, the bis trifluoromethyl sulfimide lithium of 0.7wt% ~ 1.5wt%, the linear carbonate class organic solvent of 0.4wt% ~ 0.7wt%, the cyclic carbonates organic solvent of 0.5wt% ~ 1.0wt%, 0.05wt% ~ 0.2wt% carboxylic acid esters organic solvent, stirs 30min with the speed of 3000r/min, obtains solution A;
S2, the solution A B of step S1 gained is heated to 45 ~ 60 DEG C, add 3wt% ~ 7wt% poly-aspartic-acid, 0.3wt% ~ 0.7wt% sodium ethylene diamine tetracetate, then add 3wt% ~ 7wt% butanedioic acid while stirring, and with sonic oscillation 45 ~ 55min, be cooled to room temperature, obtain solution B;
S3, in the solution B of step S2 gained, add the hydroxyethylcellulose of 0.2wt% ~ 0.4wt%, the Pidolidone of 0.3wt% ~ 0.5wt%, stirs, and obtains lithium battery electrolytes.
Preferably, deionization resistivity of water >=21M Ω in step S1.
A kind of lithium battery, the lithium battery electrolytes comprising above-mentioned lithium battery electrolytes or prepare according to the preparation method of above-mentioned lithium battery electrolytes.
The present invention has following beneficial effect:
Adopt hydroxyethylcellulose composition lithium battery colloidal electrolyte, it has stronger water holding capacity and good flow adjustment, effectively can reduce the loss of electrolyte moisture in battery use procedure, thus improves the cycle life of lithium battery; Butanedioic acid is adopted to mix by a certain percentage as additive with poly-aspartic-acid; By the suction-operated of butanedioic acid and the effect of poly-aspartic-acid refinement crystal, improve negative acid accumulator negative pole overpotential of hydrogen evolution, further improve battery performance, improve circulating battery useful life; Experiment shows, lithium battery colloidal electrolyte provided by the invention makes the cycle life of lithium battery be at least 600 times, and namely lithium battery has good cycle life.Simultaneously Pidolidone add the chemical property that effectively can not only improve electrolyte; the thermal stability of electrolyte can also be improved simultaneously; and hydroxyethylcellulose is a kind of excellent colloidal thickener containing high concentration electrolyte solution; there is the effect of good protecting colloid; preparation method's technique of lithium battery electrolytes provided by the invention is simple; cost is lower, is suitable for suitability for industrialized production.
Embodiment
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
S1, take the lithium hexafluoro phosphate of 47wt%, the LiBF4 of 0.1wt%, the bis trifluoromethyl sulfimide lithium of 0.7wt%, the linear carbonate class organic solvent of 0.4wt%, the cyclic carbonates organic solvent of 0.5wt%, 0.05wt% carboxylic acid esters organic solvent, stirs 30min with the speed of 3000r/min, obtains solution A;
S2, the solution A B of step S1 gained is heated to 45 DEG C, adds 3wt% poly-aspartic-acid, 0.3wt% sodium ethylene diamine tetracetate, then add 3wt% butanedioic acid while stirring, and use sonic oscillation 45min, be cooled to room temperature, obtain solution B;
S3, in the solution B of step S2 gained, add the hydroxyethylcellulose of 0.2wt%, the L ~ glutamic acid of 0.3wt%, stirs, obtains lithium battery electrolytes.
Embodiment 2
S1, take the lithium hexafluoro phosphate of 53wt%, the LiBF4 of 0.3wt%, the bis trifluoromethyl sulfimide lithium of 1.5wt%, the linear carbonate class organic solvent of 0.7wt%, the cyclic carbonates organic solvent of 1.0wt%, 0.2wt% carboxylic acid esters organic solvent, stirs 30min with the speed of 3000r/min, obtains solution A;
S2, the solution A B of step S1 gained is heated to 60 DEG C, adds 7wt% poly-aspartic-acid, 0.7wt% sodium ethylene diamine tetracetate, then add 7wt% butanedioic acid while stirring, and use sonic oscillation 55min, be cooled to room temperature, obtain solution B;
S3, in the solution B of step S2 gained, add the hydroxyethylcellulose of 0.4wt%, the Pidolidone of 0.5wt%, stirs, and obtains lithium battery electrolytes.
Embodiment 3
S1, take the lithium hexafluoro phosphate of 50wt%, the LiBF4 of 0.2wt%, the bis trifluoromethyl sulfimide lithium of 1.1wt%, the linear carbonate class organic solvent of 0.55wt%, the cyclic carbonates organic solvent of 0.75wt%, 0.125wt% carboxylic acid esters organic solvent, stirs 30min with the speed of 3000r/min, obtains solution A;
S2, the solution A B of step S1 gained is heated to 52.5 DEG C, adds 5wt% poly-aspartic-acid, 0.5wt% sodium ethylene diamine tetracetate, then add 5wt% butanedioic acid while stirring, and use sonic oscillation 50min, be cooled to room temperature, obtain solution B;
S3, in the solution B of step S2 gained, add the hydroxyethylcellulose of 0.3wt%, the Pidolidone of 0.4wt%, stirs, and obtains lithium battery electrolytes.
By the lithium battery electrolytes of embodiment 1 ~ 3 gained, utilize acid filling machine to be injected in battery, obtain lithium battery.
Test according to CNS.Test result shows, gained lithium battery has good charging and discharging capabilities, and its cycle life is more than 600 times.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a lithium battery electrolytes, is characterized in that: comprise
The lithium hexafluoro phosphate of 47wt% ~ 53wt%,
The LiBF4 of 0.1wt% ~ 0.3wt%,
The bis trifluoromethyl sulfimide lithium of 0.7wt% ~ 1.5wt%,
The linear carbonate class organic solvent of 0.4wt% ~ 0.7wt%,
The cyclic carbonates organic solvent of 0.5wt% ~ 1.0wt%,
0.05wt% ~ 0.2wt% carboxylic acid esters organic solvent,
The hydroxyethylcellulose of 0.2wt% ~ 0.4wt%,
The Pidolidone of 0.3wt% ~ 0.5wt%,
3wt% ~ 7wt% poly-aspartic-acid,
3wt% ~ 7wt% butanedioic acid,
The sodium ethylene diamine tetracetate of 0.3wt% ~ 0.7wt%,
Surplus is deionized water.
2. a preparation method for lithium battery electrolytes, is characterized in that, comprises the following steps:
S1, take the lithium hexafluoro phosphate of 47wt% ~ 53wt%, the LiBF4 of 0.1wt% ~ 0.3wt%, the bis trifluoromethyl sulfimide lithium of 0.7wt% ~ 1.5wt%, the linear carbonate class organic solvent of 0.4wt% ~ 0.7wt%, the cyclic carbonates organic solvent of 0.5wt% ~ 1.0wt%, 0.05wt% ~ 0.2wt% carboxylic acid esters organic solvent, stirs 30min with the speed of 3000r/min, obtains solution A;
S2, the solution A B of step S1 gained is heated to 45 ~ 60 DEG C, add 3wt% ~ 7wt% poly-aspartic-acid, 0.3wt% ~ 0.7wt% sodium ethylene diamine tetracetate, then add 3wt% ~ 7wt% butanedioic acid while stirring, and with sonic oscillation 45 ~ 55min, be cooled to room temperature, obtain solution B;
S3, in the solution B of step S2 gained, add the hydroxyethylcellulose of 0.2wt% ~ 0.4wt%, the Pidolidone of 0.3wt% ~ 0.5wt%, stirs, and obtains lithium battery electrolytes.
3. the preparation method of lithium battery electrolytes according to claim 2, is characterized in that: deionization resistivity of water >=21M Ω in step S1.
4. a lithium battery, is characterized in that: the lithium battery electrolytes that the preparation method comprising lithium battery electrolytes according to claim 1 or the lithium battery electrolytes according to claim 2 ~ 6 any one prepares.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510244460.3A CN104835983A (en) | 2015-05-07 | 2015-05-07 | Lithium battery electrolyte, preparation method thereof and lithium battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105355984A (en) * | 2015-09-28 | 2016-02-24 | 芜湖日升重型机床有限公司 | Battery electrolyte for numerical control machine tool and preparation method of battery electrolyte and battery |
| CN107464925A (en) * | 2017-08-02 | 2017-12-12 | 商丘职业技术学院 | A kind of lithium battery and power device |
| CN107464953A (en) * | 2017-08-02 | 2017-12-12 | 商丘职业技术学院 | A kind of lithium battery electrolytes and lithium battery |
| CN114373988A (en) * | 2020-11-20 | 2022-04-19 | 扬州大学 | Lithium metal battery electrolyte containing amino acid additive and preparation method thereof |
-
2015
- 2015-05-07 CN CN201510244460.3A patent/CN104835983A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105355984A (en) * | 2015-09-28 | 2016-02-24 | 芜湖日升重型机床有限公司 | Battery electrolyte for numerical control machine tool and preparation method of battery electrolyte and battery |
| CN107464925A (en) * | 2017-08-02 | 2017-12-12 | 商丘职业技术学院 | A kind of lithium battery and power device |
| CN107464953A (en) * | 2017-08-02 | 2017-12-12 | 商丘职业技术学院 | A kind of lithium battery electrolytes and lithium battery |
| CN107464925B (en) * | 2017-08-02 | 2020-08-18 | 商丘职业技术学院 | Lithium battery and power utilization device |
| CN114373988A (en) * | 2020-11-20 | 2022-04-19 | 扬州大学 | Lithium metal battery electrolyte containing amino acid additive and preparation method thereof |
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Application publication date: 20150812 |