Title:
MANUFACTURE OF POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP3363840
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent deterioration of the strength of a positive electrode due to repetition of charge and discharge, by using a fluororubber having rubber-elasticity and having a specific heat-resisting temperature, as a positive-electrode binder mixed with a positive-electrode active material of an intercalation-type lithium-manganese oxide capable of reversibly charging/discharging lithium ions, and pressed and then heat-treated.
SOLUTION: Because a positive-electrode binder has rubber-elasticity, when it is used with a large-capacity intercalation-type positive-electrode active material and particles thereof are expanded/contracted by charge/discharge, its binding property is not lowered and contact is kept satisfactory between the active material and a conductive agent and between a positive electrode and a collector. Its heat-resisting temperature is adapted to be 200°C or more that is higher than the heat-treatment temperature of the positive electrode, and therefore the binder is not deteriorated by heating and water does not remain in the positive electrode. Preferably, a fluororubber has, as a main constituent, a copolymer of hexafluoropropylene or hexafluorochloroethylene and vinylidene fluoride. A negative electrode includes a material capable of reversibly storing/releasing lithium or lithium ions.
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Inventors:
Nobuhiro Furukawa
Toshiyuki Noma
Yuji Yamamoto
Toshiyuki Noma
Yuji Yamamoto
Application Number:
JP17426999A
Publication Date:
January 08, 2003
Filing Date:
July 31, 1990
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H01M4/62; H01M4/131; H01M4/1391; H01M10/05; H01M10/052; H01M10/0566; (IPC1-7): H01M4/04; H01M4/02; H01M4/62; H01M10/40
Domestic Patent References:
| JP62226560A | ||||
| JP63121262A | ||||
| JP1294375A |
Attorney, Agent or Firm:
Masamasa Shibano