Title:
リチウム二次電池
Document Type and Number:
Japanese Patent JP4895503
Kind Code:
B2
Abstract:
Charge-discharge cycle performance is improved in a lithium secondary battery that adopts a thin film made of silicon or a silicon alloy as its negative electrode active material and has a wound electrode structure. The lithium secondary battery includes: a negative electrode having a current collector and a thin film made of silicon or a silicon alloy as a negative electrode active material, the thin film provided on the current collector; a positive electrode; a separator; the positive and negative electrodes being overlapped with the separator interposed therebetween, and the positive and negative electrodes and the separator being wound around to form an electrode assembly; a non-aqueous electrolyte; and a battery case accommodating the electrode assembly. The ratio of theoretical capacity per unit area of the negative electrode to charge capacity per unit area of the positive electrode is within the range of from 1.9 to 4.4.
Inventors:
Toshio Yanagita
Hiroyuki Minami
Taizo Sunano
Maruo Kamino
Hiroyuki Minami
Taizo Sunano
Maruo Kamino
Application Number:
JP2004380102A
Publication Date:
March 14, 2012
Filing Date:
December 28, 2004
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H01M10/052; H01M4/02; H01M4/134; H01M4/1395; H01M4/38; H01M10/05; H01M10/0587
Domestic Patent References:
| JP2004200003A | ||||
| JP2003203625A |
Attorney, Agent or Firm:
Table of contents Makoto