Title:
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP3512543
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery using a positive electrode having high energy density and excellent in the cycle characteristic by using a composite active material of a conductive polymer material and an inorganic active material for a positive electrode active material, and specifying the weight average molecular weight of the conductive polymer material.
SOLUTION: This nonaqueous electrolyte secondary battery is constituted of a positive electrode, an electrolyte layer containing a nonaqueous electrolyte, and a negative electrode capable of storing and releasing lithium. A conductive polymer material having the weight average molecular weight Mw of 1×104-2×105 is used for a positive electrode active material. A composite material of the conductive polymer material having the dispersion ratio Mw/Mn of 1-4 and an inorganic active material is used for the positive electrode active material.
Inventors:
Inoue, Tomohiro
Katagiri, Nobuo
Kato, Ikuo
Kimura, Okitoshi
Osawa, Toshiyuki
Katagiri, Nobuo
Kato, Ikuo
Kimura, Okitoshi
Osawa, Toshiyuki
Application Number:
JP34552295A
Publication Date:
March 29, 2004
Filing Date:
December 08, 1995
Export Citation:
Assignee:
RICOH CO LTD
International Classes:
H01M10/05; H01M4/13; H01M4/36; H01M4/48; H01M4/60; H01M4/62; H01M10/052; H01M10/0565; H01M10/0566; (IPC1-7): H01M4/02; H01M4/48; H01M4/60; H01M10/40