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US5874185A
Expired / Lapsed
US
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Polymer electrolyte material for use in lithium and lithium ion batteries
Assignee: Industrial Technology Research Institute
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Filing: 1997-07-24
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Granted: 1999-02-23
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Expires: 2017-07-24
Abstract
Abstract A polymer electrolyte for use in lithium batteries is disclosed. It contains: (a) a poly(vinyl chloride-co-vinyl acetate), or PVCAC, which is a copolymer containing 5 to 25 mol % of a vinyl chloride monomer, and 75 to 95 mol % of a vinyl acetate monomer; (b) a lithium salt; and (c) an organic solvent mixture. The organic solvent mixture contains at least one component selected from the group consisting of EC and PC and a high-boiling-point organic solvent. Preferably, the amount of the PVCAC is about 16-40 mol % of the polymer electrolyte, lithium about 3-12 mol %, and the organic solvent mixture about 48-81 mol %, when the polymer electrolyte was freshly prepared. Preferrably, the high-boiling-point is DMF or NMP. Within the organic solvent mixture, if DMF is used, it should preferably be about 20-60 mol % of the total organic solvent mixture. If NMP is used, it should preferably be about 10-40 mol % of the total organic solvent mixture.
Inventors
- 👤 Yung-yun Wang
- 👤 Chi-chao Wan
- 👤 Hsi-Yueh Sung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:58
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; H01M10/056; H01M10/0564; H01M10/0565; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
111 words
A polymer electrolyte for use in lithium battery comprising: (a) a poly(vinyl chloride-co-vinyl acetate), or PVCAC, which is a copolymer containing 5 to 25 mol % of a vinyl chloride monomer, and 75 to 95 mol % of a vinyl acetate monomer; (b) a lithium salt; and (c) an organic solvent mixture containing: (i) at least one component selected from the group consisting of EC and PC; and (ii) a high-boiling-point organic solvent; (d) wherein the molar ratio between PVCAC and the lithium salt ranges between about 16:12 to about 40:3, and the amount of the organic solvent mixture does not exceed about 81 mol % of the total polymer electrolyte.
Claim 2
Dependent Claim
111 words
A polymer electrolyte for use in lithium battery comprising: (a) a poly(vinyl chloride-co-vinyl acetate), or PVCAC, which is a copolymer containing 5 to 25 mol % of a vinyl chloride monomer, and 75 to 95 mol % of a vinyl acetate monomer; (b) a lithium salt; and (c) an organic solvent mixture containing: (i) at least one component selected from the group consisting of EC and PC; and (ii) a high-boiling-point organic solvent; (d) wherein the molar ratio between PVCAC and the lithium salt ranges between about 16:12 to about 40:3, and the amount of the organic solvent mixture does not exceed about 81 mol % of the total polymer electrolyte.
Claim 3
Dependent Claim
19 words
The polymer electrolyte according to claim 1 wherein the high-boiling-point organic solvent is N,N-dimethylformamide (DMF), or N-methyl pyrrolidinone (NMP).
Claim 4
Dependent Claim
26 words
The polymer electrolyte according to claim 1 wherein the high-boiling-point organic solvent is N,N-dimethylformamide (DMF), which constitutes about 20-60 mol % of the organic solvent mixture.
Claim 5
Dependent Claim
27 words
The polymer electrolyte according to claim 1 wherein the high-boiling-point organic solvent is N-methyl pyrrolidinone (NMP), which constitutes about 10-40 mol % of the organic solvent mixture.
Claim 6
Dependent Claim
43 words
The polymer electrolyte according to claim 1 wherein the lithium salt is selected from the group consisting of LiClO 4 , LiCF 3 SO 3 , LiPF 6 , LiAsF 6 , LiBF 4 , and LiN(CF 3 SO 2 ) 2 .
Claim 7
Dependent Claim
15 words
The polymer electrolyte according to claim 1 wherein the lithium salt is LiClO 4 .
Claim 8
Dependent Claim
113 words
A lithium secondary battery comprising a polymer electrolyte, wherein the polymer electrolyte contains: (a) a poly(vinyl chloride-co-vinyl acetate), or PVCAC, which is a copolymer containing 5 to 25 mol % of a vinyl chloride monomer, and 75 to 95 mol % of a vinyl acetate monomer; a lithium salt; and an organic solvent mixture containing: (i) at least one component selected from the group consisting of EC and PC; and (ii) a high-boiling-point organic solvent; (d) wherein the molar ratio between PVCAC and the lithium salt ranges between about 16:12 to about 40:3, and the amount of the organic solvent mixture does not exceed about 81 mol % of the total polymer electrolyte.
Claim 9
Dependent Claim
113 words
A lithium secondary battery comprising a polymer electrolyte, wherein the polymer electrolyte contains: (a) a poly(vinyl chloride-co-vinyl acetate), or PVCAC, which is a copolymer containing 5 to 25 mol % of a vinyl chloride monomer, and 75 to 95 mol % of a vinyl acetate monomer; a lithium salt; and an organic solvent mixture containing: (i) at least one component selected from the group consisting of EC and PC; and (ii) a high-boiling-point organic solvent; (d) wherein the molar ratio between PVCAC and the lithium salt ranges between about 16:12 to about 40:3, and the amount of the organic solvent mixture does not exceed about 81 mol % of the total polymer electrolyte.
Claim 10
Dependent Claim
20 words
The lithium secondary battery according to claim 7 wherein the high-boiling-point organic solvent is N,N-dimethylformamide (DMF), or N-methyl pyrrolidinone (NMP).
Claim 11
Dependent Claim
27 words
The lithium secondary battery according to claim 7 wherein the high-boiling-point organic solvent is N,N-dimethylformamide (DMF), which constitutes about 20-60 mol % of the organic solvent mixture.
Claim 12
Dependent Claim
28 words
The lithium secondary battery according to claim 7 wherein the high-boiling-point organic solvent is N-methyl pyrrolidinone (NMP), which constitutes about 10-40 mol % of the organic solvent mixture.
Claim 13
Dependent Claim
44 words
The lithium secondary battery according to claim 7 wherein the lithium salt is selected from the group consisting of LiClO 4 , LiCF 3 SO 3 , LiPF 6 , LiAsF 6 , LiBF 4 , and LiN(CF 3 SO 2 ) 2 .
Claim 14
Dependent Claim
16 words
The lithium secondary battery according to claim 7 wherein the lithium salt is LiClO 4 .
Claim 15
Dependent Claim
114 words
A lithium ion battery comprising a polymer electrolyte, wherein the polymer electrolyte contains: (a) a poly(vinyl chloride-co-vinyl acetate), or PVCAC, which is a copolymer containing 5 to 25 mol % of a vinyl chloride monomer, and 75 to 95 mol % of a vinyl acetate monomer; (b) a lithium salt; and (c) an organic solvent mixture containing: at least one component selected from the group consisting of EC and PC; and (ii) a high-boiling-point organic solvent; (d) wherein the molar ratio between PVCAC and the lithium salt ranges between about 16:12 to about 40:3, and the amount of the organic solvent mixture does not exceed about 81 mol % of the total polymer electrolyte.
Claim 16
Dependent Claim
114 words
A lithium ion battery comprising a polymer electrolyte, wherein the polymer electrolyte contains: (a) a poly(vinyl chloride-co-vinyl acetate), or PVCAC, which is a copolymer containing 5 to 25 mol % of a vinyl chloride monomer, and 75 to 95 mol % of a vinyl acetate monomer; (b) a lithium salt; and (c) an organic solvent mixture containing: at least one component selected from the group consisting of EC and PC; and (ii) a high-boiling-point organic solvent; (d) wherein the molar ratio between PVCAC and the lithium salt ranges between about 16:12 to about 40:3, and the amount of the organic solvent mixture does not exceed about 81 mol % of the total polymer electrolyte.
Claim 17
Dependent Claim
20 words
The lithium ion battery according to claim 13 wherein the high-boiling-point organic solvent is N,N-dimethylformamide (DMF), or N-methyl pyrrolidinone (NMP).
Claim 18
Dependent Claim
27 words
The lithium ion battery according to claim 13 wherein the high-boiling-point organic solvent is N,N-dimethylformamide (DMF), which constitutes about 20-60 mol % of the organic solvent mixture.
Claim 19
Dependent Claim
28 words
The lithium ion battery according to claim 13 wherein the high-boiling-point organic solvent is N-methyl pyrrolidinone (NMP), which constitutes about 10-40 mol % of the organic solvent mixture.
Claim 20
Dependent Claim
44 words
The lithium ion battery according to claim 13 wherein the lithium salt is selected from the group consisting of LiClO 4 , LiCF 3 SO 3 , LiPF 6 , LiAsF 6 , LiBF 4 , and LiN(CF 3 SO 2 ) 2 .
Claim 21
Dependent Claim
16 words
The lithium ion battery according to claim 13 wherein the lithium salt is LiClO 4 .
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 2002-02-22 | 2002-08-24 | 2003-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-22 | 2006-08-24 | 2007-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-22 | 2010-08-24 | 2011-02-23 | $7700.00 | Window Closed / Lapsed |