Title:
【発明の名称】二次電池
Document Type and Number:
Japanese Patent JP3133317
Kind Code:
B2
Abstract:
PURPOSE:To restrain sulfur element from acting with cation and improve the self life of a battery by using carbon material containing limited sulfur element for the battery which is provided with a positive electrode, a negative electrode formed of carbon material with cation storing and discharging operation and nonaqueous electrolyte. CONSTITUTION:A battery is provided with a positive electrode 4, a negative electrode 5 formed of carbon material with cation storing and discharging operation and nonaqueous electrolyte. The carbon material contains a limited sulfur element. The carbon material is selected out of heat-treated carbon with high polymer such as polyacrylonitrile burned, various types of coke, graphite, and amorphous carbon such as acetylene black. The content of the sulfur element is preferably 5% or less for the self life of the battery. Almost no self- discharge reaction is caused by the reaction of the sulfur element with stored cation. It is thus possible to improve the self life.
Inventors:
Masahisa Fujimoto
Nobuyuki Yoshinaga
Nobuhiro Furukawa
Nobuyuki Yoshinaga
Nobuhiro Furukawa
Application Number:
JP24949590A
Publication Date:
February 05, 2001
Filing Date:
September 18, 1990
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H01M10/05; H01M4/587; H01M10/0566; (IPC1-7): H01M10/40; H01M4/02; H01M4/58
Domestic Patent References:
| JP6290863A | ||||
| JP5991667A | ||||
| JP6059659A | ||||
| JP62136766A | ||||
| JP62154461A |
Attorney, Agent or Firm:
Masamasa Shibano
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