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EP0149846A1
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Hermetically sealed metallic oxide-hydrogen battery using hydrogen storage alloy
Assignee: Toshiba Corp
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Filing: 1984-12-27
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Granted: —
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Expires: 2004-12-27
Abstract
Abstract Hermetically sealed metalic oxide-hydrogen battery comprising a metallic oxide as a positive electrode active material [3] and hydrogen as a negative electrode active material [1], characterized in that the negative electrode is composed of a hydrogen storage alloy represented by the formula: MNi5-(x+y)MnxAly wherein M is a mischmetal (Mm), a lanthanum element or a lanthanum-rich mischmetal (Lm); and x and y are values satisfying relations of 0 < x < 1, 0 < y < I and 0.2 </= x + y </= 1, respectively. <??>An internal pressure of the battery in this invention does not increase even when a charge discharge cycle has been carried out for a long period of time, and a discharge capacity can be maintained at a high level over a prolonged period.
Inventors
- 👤 Motoya c/o Kabushiki Kaisha Toshiba Kanda
- 👤 Yuji c/o Kabushiki Kaisha Toshiba Sato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:36
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/383; H01M10/00; H01M10/34; H01M10/345; H01M10/42; H01M10/52; H01M4/24; H01M4/242; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S420/00; Y10S420/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A hermetically sealed metalic oxide-hydrogen battery comprising a metallic oxide as a positive electrode active material and hydrogen as a negative electrode active material, characterized in that said negative electrode is composed of a hydrogen storage alloy represented by the formula: wherein M is a mischmetal (Mm), a lanthanum element or a lanthanum-rich mischmetal (Lm); and x and y are values satisfying relations of 0 < x < 1, 0 < y < 1 and 0.2 ≤ x + y S 1, respectively.
Claim 2
Dependent Claim
83 words
A hermetically sealed metalic oxide-hydrogen battery comprising a metallic oxide as a positive electrode active material and hydrogen as a negative electrode active material, characterized in that said negative electrode is composed of a hydrogen storage alloy represented by the formula: wherein M is a mischmetal (Mm), a lanthanum element or a lanthanum-rich mischmetal (Lm); and x and y are values satisfying relations of 0 < x < 1, 0 < y < 1 and 0.2 ≤ x + y S 1, respectively.
Claim 3
Dependent Claim
51 words
The hermetically sealed metallic oxide-hydrogen battery according to Claim 1, wherein M is a mischmetal comprising a mixture including about 15 % by weight of La, about 30 % by weight of Ce and at least one element selected from the group consisting of Nd, Pr and Sm as the remainder.
Claim 4
Dependent Claim
38 words
The hermetically sealed metallic oxide-hydrogen battery according to Claim 2, wherein x and y are values satisfying relations of 0 < x < 1, 0 < y < 0.4 and 0.4 ≤ x + y ≤ 1, respectively.
Claim 5
Dependent Claim
16 words
The hermetically sealed metallic oxide-hydrogen battery according to Claim 1, wherein M is a lanthanum-rich mischmetal.
Claim 6
Dependent Claim
38 words
The hermetically sealed metallic oxide-hydrogen battery according to Claim 4, wherein x and y are values satisfying relations of 0 < x < 0.9, 0 < y < 0.5 and 0.3 s. x + y ≤ 0.9, respectively.
Claim 7
Dependent Claim
30 words
The hermetically sealed mettallic oxide-hydrogen battery according to Claim 1, wherein said negative electrode is provided with a phthalocyanine, metal phthalocyanine, porphyrin or metal porphyrin as an oxygen reducing catalyst.
Claim 8
Dependent Claim
115 words
The hermetically sealed metallic oxide-hydrogen battery according to Claim 6, wherein said metal phthalocyanine is one or a mixture of compounds represented by molecular formulae of C 32 H 16 N 8 M' where M' is Be, Ca, Cd, Co, Cu, Fe, Mg, Mn, Ni, Pb, Zn, Sn or Ag, C 32 H 16 N 8 M" 2 where M" is Li or Na, C 32 H 15 AlCl 2 N 2 , C 32 H 16 AlClN 8 , C 32 H 16 GaClN 8 , C 32 H 16 SnCl 2 N 2 , C 32 H 16 CrFN 8 , C 32 H 16 CuO 12 S 4 N 8 and C32H17C1N8.
Claim 9
Dependent Claim
41 words
The hermetically sealed metallic oxide-hydrogen battery according to Claim 6, wherein said metal porphyrin is one or a mixture of compounds having at least one metal selected from the group consisting of Fe, Cu, Mg, Ca, Mn, Zn, Cd and Ni.
Claim 10
Dependent Claim
129 words
The hermetically sealed metallic oxide-hydrogen battery according to Claim 1, wherein said battery has the structure of a hermetically sealed secondary battery in which said negative electrode comprises a kneaded sheet material composed of hydrogen storage alloy grains and a plastic binder, and a current collector composed of a net body, an expanded plate or a perforated plate compressedly bonded to said kneaded material sheet on its either side alone; and said negative electrode which is put on said positive electrode with the interposition of a separator is spirally wound and is received in a cylindrical metallic can, with said current collector uncovered on the outermost periphery of said wound negative electrode so as to expose the side of said kneaded material sheet having compressedly bonded said current collector.
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