Title:
NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2005/112149
Kind Code:
A1
Abstract:
A negative electrode (10) comprising a pair of current collecting surface layers (4a, 4b) respectively serving as the front and rear surface, and an active material layer (3) interposed between the surface layers. The surface layers (4a, 4b) contain an element (6) having low lithium compound-forming power, and an element (5) having high lithium compound-forming power. They have no thick film conductor for current collection. The element (5) having high lithium compound-forming power contained in the surface layers (4a, 4b) is pulverized due to the charge/discharge, thereby causing cracks to cause cracking in the surface layers. The cracks propagate in the thickness direction of the surface layers and reach the active material layer (3), thereby forming many micropores (7) which enable permeation of the electrolyte.
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Inventors:
MUSHA SHINICHI (JP)
HONDA HITOHIKO (JP)
HYAKUTAKE MASAHIRO (JP)
YASUDA KIYOTAKA (JP)
HONDA HITOHIKO (JP)
HYAKUTAKE MASAHIRO (JP)
YASUDA KIYOTAKA (JP)
Application Number:
PCT/JP2005/001500
Publication Date:
November 24, 2005
Filing Date:
February 02, 2005
Export Citation:
Assignee:
MITSUI MINING & SMELTING CO (JP)
MUSHA SHINICHI (JP)
HONDA HITOHIKO (JP)
HYAKUTAKE MASAHIRO (JP)
YASUDA KIYOTAKA (JP)
MUSHA SHINICHI (JP)
HONDA HITOHIKO (JP)
HYAKUTAKE MASAHIRO (JP)
YASUDA KIYOTAKA (JP)
International Classes:
H01M4/02; H01M4/134; H01M4/1395; H01M4/38; H01M4/64; H01M4/66; H01M4/70; (IPC1-7): H01M4/02; H01M4/38; H01M4/66; H01M10/40
Foreign References:
| JPH0850922A | 1996-02-20 | |||
| JP2003007305A | 2003-01-10 | |||
| JP3612669B1 | 2005-01-19 |
Attorney, Agent or Firm:
Hatori, Osamu (8-6 Akasaka 1-chome, Minato-k, Tokyo 52, JP)
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