Title:
【発明の名称】二次電池
Document Type and Number:
Japanese Patent JP2621294
Kind Code:
B2
Abstract:
PURPOSE:To lower a self-discharge rate and to decrease capacity deterioration even after lengthy storage by using granular coke having a mean particle size of 20-100mum as a negative active material. CONSTITUTION:Granular coke having a mean particle size of 20-100mum is used as a negative active material. Since the mean particle size of the coke is 20mum or more, cell reaction is moderately retarded, and since it is 100mum or less, the damage of a separator and internal short circuit are prevented. The self- discharge rate of a battery during storage is lowered and a deterioration in capacity is decreased even after lengthy storage.
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Inventors:
Shin Harada
Application Number:
JP2848388A
Publication Date:
June 18, 1997
Filing Date:
February 09, 1988
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H01M4/587; H01M10/05; (IPC1-7): H01M4/58
Domestic Patent References:
| JPS63121257A |
Attorney, Agent or Firm:
Tsuchiya Masaru