CN1601799A - Method of stabilizing colour of non-aquous electrolyte and lowering HF content - Google Patents
Method of stabilizing colour of non-aquous electrolyte and lowering HF content Download PDFInfo
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- CN1601799A CN1601799A CNA031583628A CN03158362A CN1601799A CN 1601799 A CN1601799 A CN 1601799A CN A031583628 A CNA031583628 A CN A031583628A CN 03158362 A CN03158362 A CN 03158362A CN 1601799 A CN1601799 A CN 1601799A
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- electrolytic solution
- nonaqueous electrolytic
- carbonate
- ester
- ethyl
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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 invention mainly aims at solving issues of increased HF content and deepen color in non-water electrolyte in storing and transporting process, especially under high temp. Technical scheme adopted in the invention is as follows: adding compound of phosphite ester class in weight 0.0005-2%of weight of non-water electrolyte into non-water electrolyte. Advantages are: less level of addition, and good effect for lowering HF content and stabilizing color.
Description
Technical field
The present invention relates to a kind of color and luster of stable nonaqueous electrolytic solution and the method that reduces HF content in the nonaqueous electrolytic solution.
Background technology
Nonaqueous electrolytic solution is the important component part of lithium ion battery and ultracapacitor.Because a variety of causes, nonaqueous electrolytic solution are easy to variable color in storage and transportation, and the content of HF also can rise in the electrolyte, these all can directly influence the sale and the result of use of nonaqueous electrolytic solution.The reason that causes nonaqueous electrolytic solution variable color and HF content to rise is a lot, and high temperature, trace impurity and moisture can make all that electrolyte darkens, HF content rises.Therefore, in producing the nonaqueous electrolytic solution process, the content that the purity of raw material, process conditions, equipment material, accumulating mode etc. all can influence HF in the nonaqueous electrolytic solution with and the stability of color and luster.
Summary of the invention
The method that the purpose of this invention is to provide a kind of color and luster and reduction HF content of stable nonaqueous electrolytic solution.
The technical solution used in the present invention is: add phosphite ester compound in nonaqueous electrolytic solution, the weight of adding is 0.0005～2% of nonaqueous electrolytic solution weight.
The further technical scheme of the present invention is: the adding weight of phosphite ester compound is preferably 0.001～1% of nonaqueous electrolytic solution weight.
Phosphite ester compound recited above is:
Wherein, R
1, R
2, R
3For carbon number at least a in 0～12 the alkyl or aryl, that is: R
1Can be for carbon number be at least a in 0～12 the alkyl or aryl, R
2Can be for carbon number be at least a in 0～12 the alkyl or aryl, R
3Can be at least a in 0～12 the alkyl or aryl for carbon number; And R
1, R
2, R
3Can be the same or different.
Organic solvent in the described nonaqueous electrolytic solution is selected from least a in the following material: vinyl carbonate; Propylene carbonate; The butylene carbonic ester; 1,2-dimethyl vinyl carbonate; Ethyl butyl carbonate; Carbonic acid first butyl ester; Dibutyl carbonate; Diethyl carbonate; Dimethyl carbonate; Chloro-ethylene carbonate; The trifluoromethyl vinyl carbonate; The carbonic acid di-n-propyl ester; Carbonic acid two-isopropyl ester; Methyl ethyl carbonate; Ethyl propyl carbonic acid ester; The ethylene isopropyl ester; Carbonic acid first propyl ester; Carbonic acid first isopropyl ester; Dimethoxy-ethane; Diethoxyethane; Oxolane; The 2-methyltetrahydrofuran; The diglycol ethylene dimethyl ether; The triethylene glycol dimethyl ether contracts; Tetraethyleneglycol dimethyl ether contracts; 1, the 3-dioxolane; Dimethyl sulfoxide (DMSO); Sulfolane; The 4-methyl isophthalic acid, 3-DOL; Gamma-butyrolacton; Methyl formate; Ethyl formate; Methyl acetate; Ethyl acetate; Methyl propionate; Ethyl propionate; Methyl butyrate; Ethyl butyrate.
Described nonaqueous electrolytic solution is the nonaqueous electrolytic solution that contains lithium salts, and lithium salts is selected from least a in the following material: LiPF
6, LiBF
4, LiAsF
6, LiSbF
6, LiCF
3SO
3
The adding mode of phosphite ester compound of the present invention can be before solvent and lithium salts mixing, in the mixing or mix the back and add.And method of the present invention is applicable to that also other does not contain the nonaqueous electrolytic solution of lithium salts.
Use method of the present invention, have addition few, to reducing content and the effective advantage of stable color and luster of HF.
Execution mode
The invention will be further elaborated below by embodiment.
Among the embodiment, the content assaying method of HF is: get～the 25g sample, the methanol solution with the 0.01N sodium methoxide by the potentiometric titrimeter titration, calculates HF content.The assay method of colourity: adopt GB/T3143-82.
Example one
Glove box (H at applying argon gas
2Preparation nonaqueous electrolytic solution EC among the O＜10ppm): EMC: DMC=1: 1: 1 (wt%) 1M LiPF
6, each claims 1000g to be placed in 5 stainless steel cylinders, is standard with un-added former state, add Trimethyl phosphite 0.08%, 0.2%, 0.5%, 0.8% respectively in all the other four samples, after the sealing, under 50 ℃ condition, compare test, detect the content of HF and the situation that color and luster changes.Result such as table 1:
Table 1
As can be seen from the above table, add an amount of Trimethyl phosphite in the nonaqueous electrolytic solution after, compare with un-added former state, not only can stablize color and luster, and can reduce the content of HF, thereby can improve the quality of nonaqueous electrolytic solution.
Example two
Glove box (H at applying argon gas
2Preparation nonaqueous electrolytic solution EC among the O＜10ppm): EMC: DMC=1: 1: 1 (wt%) 1M LiPF
6Respectively taking by weighing 1000g is placed in 4 stainless steel cylinders, with un-added former state is standard, add 0.2% Trimethyl phosphite, triethyl phosphite, phosphorous acid benzene di-isooctyl in all the other 3 samples respectively, after the sealing, under 50 ℃ condition, compare test, detect the content of HF and the situation that color and luster changes.Result such as table 2:
Table 2
As can be seen from the above table, add an amount of phosphite ester compound in the nonaqueous electrolytic solution, compare, not only can stablize color and luster, and can reduce the content of HF, thereby can improve the quality of nonaqueous electrolytic solution with un-added former state.
Example three
Glove box (H at applying argon gas
2Preparation nonaqueous electrolytic solution EC among the O＜10ppm): EMC: DMC=1: 1: 1 (wt%) 1M LiPF
6, respectively get 1000g and be placed in 2 stainless steel cylinders, be standard with un-added former state, add 0.5% tricresyl phosphite monooctyl ester respectively in all the other 1 samples, after the sealing, under the condition of room temperature, compare test, detect the content of HF and the situation that color and luster changes.Result such as table 3:
Table 3
As can be seen from the above table, add an amount of Trimethyl phosphite in the nonaqueous electrolytic solution, compare, not only can stablize color and luster, and can reduce the content of HF, thereby can improve the quality of nonaqueous electrolytic solution with un-added former state.
Claims (6)
1, nonaqueous electrolytic solution is stablized the method for color and luster and reduction HF content, and it is characterized in that: add phosphite ester compound in nonaqueous electrolytic solution, the weight of adding is 0.0005～2% of nonaqueous electrolytic solution weight.
2, method according to claim 1 is characterized in that: the adding weight of phosphite ester compound is 0.001～1% of nonaqueous electrolytic solution weight.
3, method according to claim 1 and 2 is characterized in that: described phosphite ester compound is:
R
1, R
2, R
3For carbon number at least a in 0～12 the alkyl or aryl; R
1, R
2, R
3Can be the same or different.
4, according to claim 1 or 2 or 3 described methods, it is characterized in that: the organic solvent in the described nonaqueous electrolytic solution is selected from least a in the following material: vinyl carbonate; Propylene carbonate; The butylene carbonic ester; 1,2-dimethyl vinyl carbonate; Ethyl butyl carbonate; Carbonic acid first butyl ester; Dibutyl carbonate; Diethyl carbonate; Dimethyl carbonate; Chloro-ethylene carbonate; The trifluoromethyl vinyl carbonate; The carbonic acid di-n-propyl ester; Carbonic acid two-isopropyl ester; Methyl ethyl carbonate; Ethyl propyl carbonic acid ester; The ethylene isopropyl ester; Carbonic acid first propyl ester; Carbonic acid first isopropyl ester; Dimethoxy-ethane; Diethoxyethane; Oxolane; The 2-methyltetrahydrofuran; The diglycol ethylene dimethyl ether; The triethylene glycol dimethyl ether contracts; Tetraethyleneglycol dimethyl ether contracts; 1, the 3-dioxolane; Dimethyl sulfoxide (DMSO); Sulfolane; The 4-methyl isophthalic acid, 3-DOL; Gamma-butyrolacton; Methyl formate; Ethyl formate; Methyl acetate; Ethyl acetate; Methyl propionate; Ethyl propionate; Methyl butyrate; Ethyl butyrate.
5, according to claim 1 or 2 or 3 described methods, it is characterized in that: described nonaqueous electrolytic solution is the nonaqueous electrolytic solution that contains lithium salts, and lithium salts is selected from least a in the following material: LiPF
6, LiBF
4, LiAsF
6, LiSbF
6, LiCF
3SO
3
6, method according to claim 5 is characterized in that: described lithium salts is LiPF
6
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031583628A CN1601799A (en) | 2003-09-28 | 2003-09-28 | Method of stabilizing colour of non-aquous electrolyte and lowering HF content |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031583628A CN1601799A (en) | 2003-09-28 | 2003-09-28 | Method of stabilizing colour of non-aquous electrolyte and lowering HF content |
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| Publication Number | Publication Date |
|---|---|
| CN1601799A true CN1601799A (en) | 2005-03-30 |
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ID=34660449
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|---|---|---|---|
| CNA031583628A Pending CN1601799A (en) | 2003-09-28 | 2003-09-28 | Method of stabilizing colour of non-aquous electrolyte and lowering HF content |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315483A (en) * | 2011-09-30 | 2012-01-11 | 湖南大学 | Novel multifunctional electrolyte |
| CN105895954A (en) * | 2016-05-05 | 2016-08-24 | 东莞市凯欣电池材料有限公司 | High-stability power battery electrolyte |
| CN108649265A (en) * | 2018-05-10 | 2018-10-12 | 桑德集团有限公司 | Electrolysis additive, lithium battery electrolytes and lithium battery |
| CN109870490A (en) * | 2018-08-16 | 2019-06-11 | 东莞东阳光科研发有限公司 | The measuring method of free acid content in lithium salts and its electrolyte |
| CN110718719A (en) * | 2018-07-13 | 2020-01-21 | 常熟理工学院 | Rechargeable zinc ion battery |
| CN113903991A (en) * | 2021-11-12 | 2022-01-07 | 湖州昆仑亿恩科电池材料有限公司 | Non-aqueous electrolyte of lithium ion battery and application |
| CN115148500A (en) * | 2021-03-30 | 2022-10-04 | 南通新宙邦电子材料有限公司 | Preparation method of aluminum capacitor electrolyte |
| CN115148500B (en) * | 2021-03-30 | 2024-04-19 | 南通新宙邦电子材料有限公司 | Preparation method of aluminum capacitor electrolyte |
-
2003
- 2003-09-28 CN CNA031583628A patent/CN1601799A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315483A (en) * | 2011-09-30 | 2012-01-11 | 湖南大学 | Novel multifunctional electrolyte |
| CN105895954A (en) * | 2016-05-05 | 2016-08-24 | 东莞市凯欣电池材料有限公司 | High-stability power battery electrolyte |
| CN108649265A (en) * | 2018-05-10 | 2018-10-12 | 桑德集团有限公司 | Electrolysis additive, lithium battery electrolytes and lithium battery |
| CN110718719A (en) * | 2018-07-13 | 2020-01-21 | 常熟理工学院 | Rechargeable zinc ion battery |
| CN110718719B (en) * | 2018-07-13 | 2020-10-30 | 常熟理工学院 | Rechargeable zinc ion battery |
| CN109870490A (en) * | 2018-08-16 | 2019-06-11 | 东莞东阳光科研发有限公司 | The measuring method of free acid content in lithium salts and its electrolyte |
| CN115148500A (en) * | 2021-03-30 | 2022-10-04 | 南通新宙邦电子材料有限公司 | Preparation method of aluminum capacitor electrolyte |
| CN115148500B (en) * | 2021-03-30 | 2024-04-19 | 南通新宙邦电子材料有限公司 | Preparation method of aluminum capacitor electrolyte |
| CN113903991A (en) * | 2021-11-12 | 2022-01-07 | 湖州昆仑亿恩科电池材料有限公司 | Non-aqueous electrolyte of lithium ion battery and application |
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