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EP0140973A1
Expired / Lapsed
EP
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Air cell electrode and process for preparing its catalyst
Assignee: Panasonic Holdings Corp
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Filing: 1983-07-21
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Granted: —
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Expires: 2003-07-21
Abstract
Abstract An air cell having improved strong electric discharge and storage properties is obtained by using, as a catalyst electrode, manganese oxide obtained by thermal decomposition of γ-type manganese oxyhydroxide at 250 to 450°C.
Inventors
- 👤 Nobuharu Koshiba
- 👤 Hayashi Hayakawa
- 👤 Keigo Momose
- 👤 Akira Ohta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 10:54
CPC Classifications
C; C01; C01G; C01G45/00; C01G45/02; H; H01; H01M; H01M12/00; H01M12/04; H01M12/06; H01M4/00; H01M4/86; H01M4/90; H01M4/9016; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2002/74; C01P2002/77; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
41 words
An air cell including a catalyst comprising a manganese oxide whose X-ray diffraction peaks correspondings to its lattice constants have the characteristics of Mn 5 O 8 and whose chemical analysis for MnOx satisfies the condition 1.45 ≦ x ≦ 1.60.
Claim 2
Dependent Claim
41 words
An air cell including a catalyst comprising a manganese oxide whose X-ray diffraction peaks correspondings to its lattice constants have the characteristics of Mn 5 O 8 and whose chemical analysis for MnOx satisfies the condition 1.45 ≦ x ≦ 1.60.
Claim 3
Dependent Claim
33 words
An air cell including a catalyst comprising a manganese oxide whose X-ray diffraction peaks corresponding to its lattice constants d with copper (Cu) as the target are 4.90±0.02, 3.09±0.02, 2.48±0.02, 2.03±0.02 and 1.54±0.02.
Claim 4
Dependent Claim
33 words
An air cell including a catalyst comprising a manganese oxide whose X-ray diffraction peaks corresponding to its lattice constants d with copper (Cu) as the target are 4.90±0.02, 3.09±0.02, 2.48±0.02, 2.03±0.02 and 1.54±0.02.
Claim 5
Dependent Claim
81 words
An air cell including a catalyst comprising a manganese oxide as claimed in Claim 2, wherein with the relative peak intensity I/I 1 at the lattice constant d = 2.48±0.02 of its X-ray diffraction pattern being taken as 100, the relative peak intensity at d = 4.90±0.02 lies between 50 and 100, the peak intensities at d = 3.09±0.02 and d = 2.03+0.02 are not greater than 70, and the peak intensity at d = 1.54±0.02 is not greater than 50.
Claim 6
Dependent Claim
32 words
An air cell including a catalyst comprising a manganese oxide whose X-ray diffraction peaks in terms of lattice constants d with copper (Cu) as the target include 4.92±0.02, 3.11±0.02, 2.48±0.02 and 1.62±0.02.
Claim 7
Dependent Claim
32 words
An air cell including a catalyst comprising a manganese oxide whose X-ray diffraction peaks in terms of lattice constants d with copper (Cu) as the target include 4.92±0.02, 3.11±0.02, 2.48±0.02 and 1.62±0.02.
Claim 8
Dependent Claim
74 words
An air cell including a catalyst comprising a manganese oxide as claimed in Claim 4 wherein with the relative peak intensity I/I l at lattice constant d = 4.92±0.02 in the X-ray diffraction pattern of said manganese oxide being taken as 100, the relative peak intensity at d = 3.11±0.02 lies somewhere between 50 and 100 and the relative peak intensities at d = 2.48±0.02 and d = 1.5410.02 are not greater than 50.
Claim 9
Dependent Claim
21 words
An air cell as claimed in any of Claims 1, 2 and 4 wherein said manganese oxide occurs as acicular crystals.
Claim 10
Dependent Claim
36 words
An air cell as claimed in any of Claims 1, 2 and 4 wherein the catalyst is composed of manganese oxide as a main component and activated carbon, carbon black and fluorine-containing resin as additive components.
Claim 11
Dependent Claim
37 words
An air cell as claimed in any of Claims 1, 2 and 4 wherein the air cell is composed of said manganese oxide catalyst as a main component and carbon black and fluorine-containing resin as additive components.
Claim 12
Independent Claim
19 words
A method of producing a catalyst characterized by heat-treating y-manganese oxyhydroxide at a temperature ranging from 250°C to 450°c.
Claim 13
Independent Claim
19 words
A method of producing a catalyst characterized by heat-treating y-manganese oxyhydroxide at a temperature ranging from 250°C to 450°c.
Claim 14
Dependent Claim
26 words
A method for producing a catalyst as claimed in Claim 9 wherein the heat-treatment of y-manganese oxyhydroxide is conducted in an atmosphere substantially free of oxygen.
Claim 15
Dependent Claim
18 words
A method of producing a catalyst as claimed in Claim 10 wherein said atmosphere is an inert gas.
Claim 16
Dependent Claim
17 words
A method of producing a catalyst as claimed in Claim 11 wherein said atmosphere is argon gas.
Claim 17
Dependent Claim
17 words
A method of producing a catalyst as claimed in Claim 11 wherein said atmosphere is nitrogen gas.
Claim 18
Dependent Claim
17 words
A method of producing a catalyst as claimed in Claim 11 wherein said atmosphere is helium gas.
References Cited (Backward Citations)
No citation records indexed.
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