EP0198484A2
Expired / Lapsed
EP
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Secondary battery
Assignee: Hitachi Ltd
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Filing: 1986-04-16
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Granted: —
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Expires: 2006-04-16
Abstract
Abstract A secondary battery comprising an electroconductive polymer as an electrode active material for a positive electrode (1), a lithium alloy as a negative electrode (2), and an electrolytic solution composed of a solvent mixture of propylene carbonate and an ether-based solvent containing a lithium complex salt in a dissolved state, the polymer comprising polyaniline having an aniline structure in the main chain where doping of anions from the electrolytic solution is carried out at charging and undoping of the anions is carried out at discharging has a low self discharge rate and a long charge-discharge cycle life.
Inventors
- 👤 Kazunori Fujita
- 👤 Shigeoki Nishimura
- 👤 Hiroyuki Sugimoto
- 👤 Shinpei Matsuda
- 👤 Noboru Ebato
- 👤 Atsuko Tohyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 13:17
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M4/00; H01M4/02; H01M4/36; H01M4/60; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
106 words
A secondary battery which comprises a pair of a positive electrode (1) and a negative electrode (2) of lithium alloy, counterposed against each other, and an electrolytic solution filled therebetween, the positive electrode (1) having an electroconductive polymer as an electrode active material, the electroconductive polymer comprising polyaniline having an aniline structure in the main chain and an atomic ratio of hydrogen to carbon of 0.75 to 0.85 on average and an atomic ratio of 0.15 to 0.18 on average, and the electrolytic solution being composed of a solvent mixture of propylene carbonate and an ether-based solvent containing a lithium complex salt in a dissolved state.
Claim 2
Dependent Claim
106 words
A secondary battery which comprises a pair of a positive electrode (1) and a negative electrode (2) of lithium alloy, counterposed against each other, and an electrolytic solution filled therebetween, the positive electrode (1) having an electroconductive polymer as an electrode active material, the electroconductive polymer comprising polyaniline having an aniline structure in the main chain and an atomic ratio of hydrogen to carbon of 0.75 to 0.85 on average and an atomic ratio of 0.15 to 0.18 on average, and the electrolytic solution being composed of a solvent mixture of propylene carbonate and an ether-based solvent containing a lithium complex salt in a dissolved state.
Claim 3
Dependent Claim
17 words
A secondary battery according to Claim 1, wherein the electroconductive polymer consists substantially of the said polyaniline.
Claim 4
Dependent Claim
13 words
A secondary battery according to Claim 1, wherein the ether-based solvent is dimethoxyethane.
Claim 5
Dependent Claim
23 words
A secondary battery according to Claim 1, wherein the lithium alloy is a lithium-aluminum alloy combining 20 to 80% by atom of lithium.
Claim 6
Dependent Claim
30 words
A secondary battery according to Claim 1, wherein the lithium complex salt is at least one of LiBF 4 , LiPF 6 , LiC10 4 , and LiAsF 6 .
Claim 7
Dependent Claim
20 words
A secondary battery according to Claim 1, wherein the polyaniline has an electroconductivity of 0.1 or more S·cm -1 .
Claim 8
Dependent Claim
109 words
A secondary battery which comprises a pair of a positive electrode (1) and a negative electrode (2) of lithium alloy, counterposed against each other, and an electrolytic solution filled therebetween, the positive electrode (1) having an electroconductive polymer as an electrode active material, the electroconductive polymer comprising polyaniline having a fiber form, an aniline structure in the main chain and an atomic ratio of hydrogen to carbon of 0.75 to 0.85 on average and an atomic ratio of 0.15 to 0.18 on average, and the electrolytic solution being composed of a solvent mixture of propylene carbonate and an ether-based solvent containing a lithium complex salt in a dissolved state.
Claim 9
Dependent Claim
109 words
A secondary battery which comprises a pair of a positive electrode (1) and a negative electrode (2) of lithium alloy, counterposed against each other, and an electrolytic solution filled therebetween, the positive electrode (1) having an electroconductive polymer as an electrode active material, the electroconductive polymer comprising polyaniline having a fiber form, an aniline structure in the main chain and an atomic ratio of hydrogen to carbon of 0.75 to 0.85 on average and an atomic ratio of 0.15 to 0.18 on average, and the electrolytic solution being composed of a solvent mixture of propylene carbonate and an ether-based solvent containing a lithium complex salt in a dissolved state.
Claim 10
Dependent Claim
21 words
A secondary battery according to Claim 7, wherein the electroconductive polymer having a fiber form consists substantially of the said polyaniline.
Claim 11
Dependent Claim
35 words
A secondary battery according to Claim 1, wherein the positive electrode (1) is an electrode prepared from a mixture of powders of the said polyaniline and powders of carbon, bound by polytetrafluoroethylene as a binder.
Claim 12
Dependent Claim
119 words
A secondary battery which comprises a pair of positive electrode (1) and a negative electrode (2) of lithium alloy, counterposed against each other, an electrolytic solution filled therebetween, and a porous electrically insulating separator (5), the positive electrode (1) having an electroconductive polymer as an electrode active material, the electroconductive polymer comprising polyaniline having an aniline structure in the main chain and an atomic ratio of hydrogen to carbon of 0.75 to 0.85 on average and an atomic ratio of 0.15 to 0.18 on average, and the electrolytic solution being composed of a solvent mixture of propylene carbonate and an ether-based solvent containing a lithium complex salt in a dissolved state being retained in the separator (5) by impregnation.
Claim 13
Dependent Claim
119 words
A secondary battery which comprises a pair of positive electrode (1) and a negative electrode (2) of lithium alloy, counterposed against each other, an electrolytic solution filled therebetween, and a porous electrically insulating separator (5), the positive electrode (1) having an electroconductive polymer as an electrode active material, the electroconductive polymer comprising polyaniline having an aniline structure in the main chain and an atomic ratio of hydrogen to carbon of 0.75 to 0.85 on average and an atomic ratio of 0.15 to 0.18 on average, and the electrolytic solution being composed of a solvent mixture of propylene carbonate and an ether-based solvent containing a lithium complex salt in a dissolved state being retained in the separator (5) by impregnation.
Claim 14
Dependent Claim
16 words
A secondary battery according to Claim 10, wherein the separator (5) is composed of polypropylene carbonate.
Claim 15
Dependent Claim
14 words
A secondary battery according to Claim 10, wherein the polyaniline has a fiber form.
Claim 16
Dependent Claim
25 words
A.secondary battery according to Claim 12, wherein the fiber is about 1,000 to about 3,000 A in diameter and a few to ten-odd µm long.
Claim 17
Dependent Claim
35 words
A secondary battery according to Claim 10, wherein the positive electrode (1) is an electrode prepared from a mixture of powders of the said polyaniline and powders of carbon, bound by polytetrafluoroethylene as a binder.
Claim 18
Dependent Claim
17 words
A secondary battery according to Claim 14, wherein the powders of carbon are powders of acetylene black.
Claim 19
Dependent Claim
177 words
A secondary battery which comprises a pair of a positive electrode (1) and a negative electrode (2) of lithium alloy, counterposed against each other, an electrolytic solution filled therebetween, a porous electrically insulating separator (5) provided between the electrodes (1, 2), and current collectors (3, 4) provided adjacent to the positive and negative electrodes (1, 2), respectively, and a current collector terminal (6) connected to the current collector (3) for the positive electrode (1) and a current collector terminal (7) connected to the current collector (4) for the negative electrode (2), the positive electrode (1) having an electroconductive polymer as an electrode active material, the electroconductive polymer comprising polyaniline having an aniline structure in the main chain and an atomic ratio of hydrogen to carbon of 0.75 to 0.85 on average and an atomic ratio of 0.15 to 0.18 on average, and the electrolytic solution being composed of a solvent mixture of propylene carbonate and an ether-based solvent containing a lithium complex salt in a dissolved state being retained in the separator ( 5 ) by impregnation.
Claim 20
Dependent Claim
177 words
A secondary battery which comprises a pair of a positive electrode (1) and a negative electrode (2) of lithium alloy, counterposed against each other, an electrolytic solution filled therebetween, a porous electrically insulating separator (5) provided between the electrodes (1, 2), and current collectors (3, 4) provided adjacent to the positive and negative electrodes (1, 2), respectively, and a current collector terminal (6) connected to the current collector (3) for the positive electrode (1) and a current collector terminal (7) connected to the current collector (4) for the negative electrode (2), the positive electrode (1) having an electroconductive polymer as an electrode active material, the electroconductive polymer comprising polyaniline having an aniline structure in the main chain and an atomic ratio of hydrogen to carbon of 0.75 to 0.85 on average and an atomic ratio of 0.15 to 0.18 on average, and the electrolytic solution being composed of a solvent mixture of propylene carbonate and an ether-based solvent containing a lithium complex salt in a dissolved state being retained in the separator ( 5 ) by impregnation.
Claim 21
Dependent Claim
14 words
A secondary battery according to Claim 16, wherein the polyaniline has a fiber form.
Claim 22
Dependent Claim
35 words
A secondary battery according to Claim 16, wherein the positive electrode (1) is an electrode prepared from a mixture of powders of the said polyaniline and powders of carbon, bound by polytetrafluoroethylene as a binder.
Claim 23
Dependent Claim
32 words
A secondary battery according to anyone of Claims 1, 7, 10 and 16, wherein the solvent mixture has a concentration of 20 to 80% by volume, the balance being the ether-based solvent.
References Cited (Backward Citations)
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