Title:
【発明の名称】二次電池
Document Type and Number:
Japanese Patent JP2691555
Kind Code:
B2
Abstract:
PURPOSE:To provide a large battery capacity and improve the selfdischarging characteristic by bearing the active substance of a negative electrode body with a bearer consisting of a mixture of specific carbonaceous substance and a metal cable of forming alloy with active substance. CONSTITUTION:Active substance of a negative electrode body is alkali metal with lithium as the main component, while the bearer consists of a mixture of a metal capable of forming alloy with active substance and a carbonaceous substance having an atomic ratio of hydrogen to carbon no more than 0.15, a surface spacing of the surfaces by X-ray wide-angle diffraction method exceeding 3.37Angstrom , and a size of crystallite in the c direction under 150Angstrom . The mix proportion of the carbonaceous substance and the metal capable of forming alloy with active substance shall be such that the content of the alloy forming metal in the mixture is 3-50wt.%. The amount for the bearer to bear the active substance shall preferably be 1-20wt.% with respect to the carbonaceous substance and 1-80mol% to the alloy forming metal. This enables large current discharging and improves selfdischarging characteristic.
Inventors:
Katsuji Ikeda
Hiroyoshi Nose
Inada Kuniaki
Mitsutaka Miyabayashi
Toshifumi Nishii
Hiroshi Yui
Hiroyoshi Nose
Inada Kuniaki
Mitsutaka Miyabayashi
Toshifumi Nishii
Hiroshi Yui
Application Number:
JP8225688A
Publication Date:
December 17, 1997
Filing Date:
April 05, 1988
Export Citation:
Assignee:
Toshiba Battery Co., Ltd.
Mitsubishi Chemical Corporation
Mitsubishi Chemical Corporation
International Classes:
H01M4/02; H01M4/04; H01M4/13; H01M4/36; H01M4/587; H01M4/66; H01M10/05; H01M10/052; H01M4/40; H01M4/62; (IPC1-7): H01M4/66; H01M4/02
Attorney, Agent or Firm:
Hajime Tsukuni