US4615959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary battery or cell with improved rechargeability
Assignee: Sanyo Chemical Industries Ltd
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Filing: 1985-03-07
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Granted: 1986-10-07
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Expires: 2005-03-07
Abstract
Abstract A secondary battery or cell with improved rechargeability is obtained by combination of (A) a cathode active material comprising a chalcogen compound of a transition metal, (B) an electrolyte comprising an organic solvent having dissolved therein a lithium salt and (C) an anode active material comprising lithium metal in electrical contact with an electrically conductive carbonaceous material which is a pyrolysis residue of an organic material such as synthetic high polymers. The anode active material can be formed in situ within the battery, by self discharge of lithium metal into the carbonaceous material. The battery or cell is of excellent properties, such as stability or flatness of discharge voltage and electric capacity.
Inventors
- 👤 Hiroshi Hayashi
- 👤 Masahiro Satoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:49
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; H01M4/134; H01M10/00; H01M10/05; H01M10/052; H01M10/058; H01M4/36; H01M4/58; H01M4/583; H01M4/587; H01M4/64; H01M4/66; H01M4/663; H01M4/62; H01M4/624; H01M4/625; H01M6/00; H01M6/14; H01M6/16; H01M6/162; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
144 words
A secondary battery or cell with improved rechargeability, which comprises: (A) a cathode active material comprising a chalcogen compound of a transition metal, (B) an electrolyte comprising a organic solvent having dissolved therein a lithium salt, and (C) an anode active material comprising lithium metal in electrical contact with an electrically conductive substantially amorphous carbonaceous material having a conductivity of at least 10 -5 mho/cm and a density of at most 1.8 g/cm 3 , said carbonaceous material being a pyrolysis residue formed by heating at least one organic material selected from the group consisting of synthetic high polymers, natural high polymers, pitches and coals, in an inert atmosphere to a temperature ranging from about 300° C. to 1500° C., wherein said anode material is formed in situ within the secondary battery or cell, by self discharge of lithium metal into said carbonaceous material.
Claim 2
Dependent Claim
144 words
A secondary battery or cell with improved rechargeability, which comprises: (A) a cathode active material comprising a chalcogen compound of a transition metal, (B) an electrolyte comprising a organic solvent having dissolved therein a lithium salt, and (C) an anode active material comprising lithium metal in electrical contact with an electrically conductive substantially amorphous carbonaceous material having a conductivity of at least 10 -5 mho/cm and a density of at most 1.8 g/cm 3 , said carbonaceous material being a pyrolysis residue formed by heating at least one organic material selected from the group consisting of synthetic high polymers, natural high polymers, pitches and coals, in an inert atmosphere to a temperature ranging from about 300° C. to 1500° C., wherein said anode material is formed in situ within the secondary battery or cell, by self discharge of lithium metal into said carbonaceous material.
Claim 3
Dependent Claim
53 words
The secondary battery or cell of claim 1, wherein said organic material is at least one synthetic high polymer selected from the group consisting of polyacrylonitrile, polyvinyl chloride, polyvinylidene choride, polyvinyl alcohol, polybutadiene, polyethylene, polymethyl vinyl ketone, polyphenylene, polystyrene, polyacetylenes, polyarylacetylenes, polyimides, polyamides, polybenzimidazoles, polysemicarbazides, polybenzoxadinones, epoxy resins, furan resins and phenolic resins.
Claim 4
Dependent Claim
29 words
The secondary battery or cell of claim 1, wherein said organic material is at least one synthetic high polymer selected from the group consisting of polyarylacetylenes and phenolic resins.
Claim 5
Dependent Claim
47 words
The secondary battery or cell of claim 1, wherein said organic material is at least one synthetic high polymer selected from the group consisting of polyarylacetylenes having repeating units of the general formula: ##STR3## wherein X is Cl or methyl, and Y is H, Cl or methyl.
Claim 6
Dependent Claim
42 words
The secondary battery or cell of claim 1, wherein said pyrolysis residue is formed by heating the organic material in an inert atmosphere to a temperature sufficiently high to bring about substantially complete thermal decomposition of noncarbon constituents of the organic material.
Claim 7
Dependent Claim
21 words
The secondary battery or cell of claim 1, wherein said carbonaceous material is an activated pyrolysis residue of the organic material.
Claim 8
Dependent Claim
22 words
The secondary battery or cell of claim 1, wherein said pyrolysis residue is activated by steam activation, drug activation, or partial oxidation.
Claim 9
Dependent Claim
24 words
The secondary battery or cell of claim 1, wherein said pyrolysis residue is in the form of film, fiber, fabric, thin plate or powder.
Claim 10
Dependent Claim
32 words
The secondary battery or cell of claim 1, wherein the transition metal is selected from the group consisting of metals of Groups IB-VII and Group VIII of the long form periodic table.
Claim 11
Dependent Claim
37 words
The secondary battery or cell of claim 1, wherein said chalogen compound is a chalcogenide of at least one transition metal selected from the group consisting of titanium, vanadium, chromium, manganese, cobalt, copper, iron, niobium and molybdenum.
Claim 12
Dependent Claim
29 words
The secondary battery or cell of claim 1, wherein said organic solvent is at least one selected from the group consisting of esters, ethers, ketones, aldehydes, nitriles and amides.
Claim 13
Dependent Claim
43 words
The secondary battery or cell of claim 1, wherein the lithium salt is selected from the group consisting of LiClO 4 , LiPF 6 , lithium trifluoromethane sulfonate, LiCl, LiBr, LiI, LiAsF 6 , LiBF 4 , LiBCl 4 and LiAlCl 4 .
Claim 14
Dependent Claim
138 words
The secondary battery or cell of claim 1, which comprises: (1) a cathode container with an opening, (2) a first metal net for collecting electricity situated on an inner surface of said container, (3) said cathode active material (A) placed on top of said first metal net, (4) a separator containing said electrolyte (B) placed on top of said cathode active material, (5) a gasket placed so as to maintain the position of the previously recited elements, (6) said carbonaceous material placed on top of said separator, in electrical contact with (7) said lithium metal as anode active material (C), (8) a second metal net for collecting electricity situated on top of said carbonaceous material, and (9) an anode container having said anode active material situated onto an inner surface, placed into the opening of said cathode container.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |