US4555456A
Expired / Lapsed
US
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Cathode structure for thin film battery
Assignee: Hitachi Ltd
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Filing: 1984-05-22
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Granted: 1985-11-26
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Expires: 2004-05-22
Abstract
Abstract A cathode structure for a thin film battery in which a titanium oxide layer is disposed on a substrate and has a titanium disulfide thin film disposed thereon. The cathode structure exhibits an excellent performance when applied to a lithium battery, a sodium battery, etc.
Inventors
- 👤 Keiichi Kanehori
- 👤 Katsuki Miyauchi
- 👤 Yukio Ito
- 👤 Fumiyoshi Kirino
- 👤 Tetsuichi Kudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:54
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/581; H01M4/5815; H01M4/64; H01M4/66; H01M4/664; H01M6/00; H01M6/14; H01M6/18; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
In a thin film battery comprising a cathode and anode sandwiching an electrolyte, the improvement comprising wherein the cathode structure comprises a titanium disulfide thin film as a cathode active material disposed on a substrate, with a layer of titanium oxide being formed between the substrate and the titanium disulfide thin film.
Claim 2
Dependent Claim
52 words
In a thin film battery comprising a cathode and anode sandwiching an electrolyte, the improvement comprising wherein the cathode structure comprises a titanium disulfide thin film as a cathode active material disposed on a substrate, with a layer of titanium oxide being formed between the substrate and the titanium disulfide thin film.
Claim 3
Dependent Claim
28 words
A thin film battery as defined in claim 1, said battery being selected from the group consisting of a lithium battery, a sodium battery and a copper battery.
Claim 4
Dependent Claim
43 words
A thin film battery as defined in claim 1, wherein said titanium oxide includes at least one member selected from the group consisting of TiO, TiO 2 , Ti 2 O 3 , Ti 3 O 5 and these compounds having oxygen vacancies.
Claim 5
Dependent Claim
18 words
A thin film battery as defined in claim 2, wherein the maximum amount of oxygen vacancies is 0.1.
Claim 6
Dependent Claim
33 words
A cathode structure for a thin film battery as defined in claim 1, wherein a thickness of said layer of titanium oxide falls within a range from 0.1 μm to 5.0 μm inclusive.
Claim 7
Dependent Claim
45 words
A thin film battery as defined in claim 1, wherein said titanium disulfide thin film is formed on said titanium oxide layer by chemical vapor deposition employing TiCl 4 and H 2 S as source gases under a reduced pressure of at most 30 kPa.
Claim 8
Dependent Claim
26 words
A thin film battery as defined in claim 6, wherein the temperature of the substrate during forming of the titanium disulfide thin film is 350°-650° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |