EP0612117A2
Expired / Lapsed
EP
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Nonaqueous secondary battery
Assignee: Sharp Corp
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Filing: 1994-02-15
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Granted: —
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Expires: 2014-02-15
Abstract
Abstract A nonaqueous secondary battery comprising a cathode, an anode and a nonaqueous electrolyte disposed and sealed between the cathode and the anode wherein the anode is made of a carbon material as its active material, in which the carbon material comprises a fine core particle of a metal or an alloy thereof, and a carbon layer which is arranged and stacked in an onion-like shell configuration centering on the fine core particle, at least part of the carbon layer having a crystal structure in which graphite-like layers are stacked and the fine core particle having an average diameter of about 10 to 150nm.
Inventors
- 👤 Kazuo Yamada
- 👤 Hideaki Tanaka
- 👤 Tetsuya Yoneda
- 👤 Takehito Mitate
- 👤 Hiroyuki Kitayama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 00:32
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/583; H01M6/00; H01M6/14; H01M6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
A nonaqueous secondary battery comprising a cathode, an anode and a nonaqueous electrolyte disposed and sealed between the cathode and the anode wherein the anode is made of a carbon material as its active material, in which the carbon material comprises a fine core particle of a metal or an alloy thereof, and a carbon layer which is arranged and stacked in an onion-like shell configuration centering on said fine core particle, at least part of the carbon layer having a crystal structure in which graphite-like layers are stacked and the fine core particle having an average diameter of about 10 to 150nm.
Claim 2
Dependent Claim
20 words
A nonaqueous secondary battery according to claim 1 wherein the fine core particle comprises VIII element or an alloy thereof.
Claim 3
Dependent Claim
17 words
A nonaqueous secondary battery according to claim 2 wherein the VIII element is iron, nickel or cobalt.
Claim 4
Dependent Claim
27 words
A nonaqueous secondary battery according to claim 1 wherein the carbon material is formed of a primary particles having an average diameter of about 40 to 200nm.
Claim 5
Dependent Claim
23 words
A nonaqueous secondary battery according to claim 4 wherein the primary particles form an aggregation having a size of about 0.1 to 80µm.
Claim 6
Dependent Claim
62 words
A nonaqueous secondary battery according to claim 1 wherein the crystal structure has about 0.336 to 0.360nm as mean of interlayer spacing of (002) plane spacing determined by the X ray wide angle diffusion method, about 10 to 25nm as mean crystallite size in the (002) plane direction and about 10 to 25nm as mean crystallite size in the (110) plane direction.
Claim 7
Dependent Claim
25 words
A nonaqueous secondary battery according to claim 1 wherein the content of the fine core particle in the carbon material is about 0.005 to 10atm%.
References Cited (Backward Citations)
No citation records indexed.
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