CN108376801B - Preparation method of novel lithium battery electrolyte lithium bistrifluoromethylsulfonyl imide - Google Patents
Preparation method of novel lithium battery electrolyte lithium bistrifluoromethylsulfonyl imide Download PDFInfo
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- CN108376801B CN108376801B CN201711233177.6A CN201711233177A CN108376801B CN 108376801 B CN108376801 B CN 108376801B CN 201711233177 A CN201711233177 A CN 201711233177A CN 108376801 B CN108376801 B CN 108376801B
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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
- H01M10/058—Construction or manufacture
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention provides a preparation method of a novel lithium battery electrolyte lithium bistrifluoromethylsulfonyl imide. (1) Adopting trifluoromethanesulfonic acid as a catalyst, and purifying high-purity trifluoromethanesulfonyl fluoride by an electrolysis method; (2) rectifying under the condition of controlling low temperature by liquid nitrogen cooling to further prepare high-purity trifluoromethanesulfonyl fluoride, and cooling the gas into liquid for filling; (3) finally, the filled liquid trifluoromethanesulfonyl fluoride is used as a raw material to prepare the lithium imide and the series products thereof. The purification method replaces the traditional diethyl ether purification method, avoids the problems that diethyl ether is easy to volatilize and can cause coma, and meets the international requirements on the lithium ion power battery electrolyte. The triflic acid with extremely strong thermodynamic and chemical stability is mainly used as the catalyst for preparing the product, the catalytic activity is extremely high, and the prepared product has recoverability.
Description
Technical Field
The invention relates to a preparation method of a novel lithium battery electrolyte lithium bistrifluoromethylsulfonyl imide.
Background
The lithium imide can be widely applied to lithium battery products, and the lithium battery has the characteristics of high energy, high-current charging and discharging, no memory effect, low raw material cost, environmental friendliness and the like, is widely applied to electronic equipment such as mobile communication, notebook computers, digital cameras and the like, and is a novel green energy product. The lithium imide as the organic electrolyte of lithium ion cell has relatively great anion radius, small lattice energy, high dissociation degree, high electrochemical stability and conductivity up to 1.0 to 10-2S/m, and does not have any corrosion effect on the aluminum current collector under higher voltage, thus solving the problems of low conductivity and poor effect of the traditional electrolyte solution.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation method of a novel lithium battery electrolyte lithium bistrifluoromethylsulfonyl imide.
The method comprises the following specific steps:
(1) adopting trifluoromethanesulfonic acid as a catalyst, and purifying high-purity trifluoromethanesulfonyl fluoride by an electrolysis method;
(2) rectifying under the condition of controlling low temperature by liquid nitrogen cooling to further prepare high-purity trifluoromethanesulfonyl fluoride, and cooling the gas into liquid for filling;
(3) finally, the lithium imide is prepared by adopting the filled liquid trifluoromethanesulfonyl fluoride as a raw material.
The conventional crystallization process uses diethyl ether which is one of the strictly regulated chemicals in China, so that the purification method replaces the conventional diethyl ether purification method, avoids the problems that diethyl ether is easy to volatilize and can cause people to be coma, and meets the international requirements on the lithium ion power battery electrolyte.
The invention has the following beneficial effects: the trifluoromethanesulfonic acid with extremely strong thermodynamic and chemical stability is used as a catalyst for preparing the product, the catalytic activity is extremely high, and the prepared product has recoverability;
the novel lithium fluorosulfonyl imide electrolyte material is applied to the new field of lithium ion power batteries, the problems of low conductivity and poor effect of the traditional electrolyte solution are solved, and the electrochemical performance is excellent;
the novel purification method is adopted, so that the defect that the conventional purification method is easy to volatilize ether to cause coma is overcome; the lithium imide prepared by the invention has good thermal stability, the conductivity is unchanged at the working temperature of-180-400 ℃, the stable voltage is about 5V, explosion does not occur even at the temperature of more than 500 ℃, the lithium imide can be operated in an ultra-low temperature and ultra-high temperature environment, and the lithium imide is the lithium battery electrolyte with the best comprehensive performance at present.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood 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.
The technical solutions in the patent examples of the invention are described in detail below, but the described embodiments are only a part of the embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
A method for preparing a novel lithium battery electrolyte lithium bistrifluoromethylsulfonyl imide.
The method comprises the following specific steps:
(1) adopting trifluoromethanesulfonic acid as a catalyst, and purifying high-purity trifluoromethanesulfonyl fluoride by an electrolysis method;
(2) and (3) rectifying under the condition of controlling low temperature by liquid nitrogen cooling to further prepare high-purity trifluoromethanesulfonyl fluoride, and cooling the gas into liquid for filling.
(3) Finally, the lithium imide is prepared by adopting the filled liquid trifluoromethanesulfonyl fluoride as a raw material.
The purification method replaces the traditional diethyl ether purification method, avoids the problems that diethyl ether is easy to volatilize and can cause coma, and meets the international requirements on the lithium ion power battery electrolyte. The triflic acid with extremely strong thermodynamic and chemical stability is mainly used as a catalyst for preparing the product, the catalytic activity is extremely high, and the prepared product has recoverability; the novel lithium fluorosulfonyl imide electrolyte material is applied to the new field of lithium ion power batteries, the problems of low conductivity and poor effect of the traditional electrolyte solution are solved, and the electrochemical performance is excellent; overcomes the defect that the traditional purification method is easy to volatilize ether to cause coma; the lithium imide prepared by the invention has good thermal stability, the conductivity is unchanged at the working temperature of-180-400 ℃, the stable voltage is about 5V, explosion does not occur even at the temperature of more than 500 ℃, the lithium imide can be operated in an ultra-low temperature and ultra-high temperature environment, and the lithium imide is the lithium battery electrolyte with the best comprehensive performance at present.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A preparation method of novel lithium battery electrolyte lithium bistrifluoromethylsulfonyl imide is characterized by comprising the following steps:
(1) adopting trifluoromethanesulfonic acid as a catalyst, and purifying high-purity trifluoromethanesulfonyl fluoride by an electrolysis method;
(2) rectifying under the condition of controlling low temperature by liquid nitrogen cooling to further prepare high-purity trifluoromethanesulfonyl fluoride, and cooling the trifluoromethanesulfonyl fluoride gas into liquid for filling;
(3) finally, the filled liquid trifluoromethanesulfonyl fluoride is used as a raw material to prepare the lithium bis (trifluoromethanesulfonyl) imide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711233177.6A CN108376801B (en) | 2017-11-30 | 2017-11-30 | Preparation method of novel lithium battery electrolyte lithium bistrifluoromethylsulfonyl imide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711233177.6A CN108376801B (en) | 2017-11-30 | 2017-11-30 | Preparation method of novel lithium battery electrolyte lithium bistrifluoromethylsulfonyl imide |
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| Publication Number | Publication Date |
|---|---|
| CN108376801A CN108376801A (en) | 2018-08-07 |
| CN108376801B true CN108376801B (en) | 2020-09-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101402591A (en) * | 2008-11-09 | 2009-04-08 | 中国船舶重工集团公司第七一八研究所 | Process for preparing high-purity trifluoromethyl sulphonic acid |
| CN101885693A (en) * | 2009-05-15 | 2010-11-17 | 孙友璋 | Processing technique for diimide lithium |
| CN102153493A (en) * | 2011-03-04 | 2011-08-17 | 孙乐群 | Novel method for preparing di(trimethyl fluoride sulfonyl)imine lithium |
| CN104387300A (en) * | 2014-11-11 | 2015-03-04 | 中国船舶重工集团公司第七一八研究所 | Purification method of trifluoromathanesulfonyl fluoride |
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2017
- 2017-11-30 CN CN201711233177.6A patent/CN108376801B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101402591A (en) * | 2008-11-09 | 2009-04-08 | 中国船舶重工集团公司第七一八研究所 | Process for preparing high-purity trifluoromethyl sulphonic acid |
| CN101885693A (en) * | 2009-05-15 | 2010-11-17 | 孙友璋 | Processing technique for diimide lithium |
| CN102153493A (en) * | 2011-03-04 | 2011-08-17 | 孙乐群 | Novel method for preparing di(trimethyl fluoride sulfonyl)imine lithium |
| CN104387300A (en) * | 2014-11-11 | 2015-03-04 | 中国船舶重工集团公司第七一八研究所 | Purification method of trifluoromathanesulfonyl fluoride |
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| CN108376801A (en) | 2018-08-07 |
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