Document Type and Number:
Japanese Patent JP4162075
Kind Code:
B2
Abstract:
To provide a nonaqueous electrolyte secondary battery with high capacity and superior charge-discharge cycle life characteristics.
The nonaqueous electrolyte secondary battery which comprises a positive electrode in which charge and discharge are possible, a negative electrode in which charge and discharge are possible and a nonaqueous electrolyte, wherein the negative electrode consists of a current collector with continuous pore and a negative electrode active material filled in the current collector, wherein a specific surface area of the current collector indicates from 0.002 m2/g to 0.06 m2/g, wherein a void ratio of the current collector indicates from 60% to 97%, wherein an average particle diameter d of the negative electrode active material indicates from 0.5 μm to 50 μm, wherein a volume from 10% to 25% of the total volume of the continuous pore is filled with the negative electrode active material, and wherein a ratio in a joint area of the negative electrode active material and the current collector against a surface area of the negative electrode active material indicates from 5% to 40%.
COPYRIGHT: (C)2003,JPO
Inventors:
Takayuki Nakamoto
Toshinari Nanai
Yasuhiko Mito
Shinji Kasamatsu
Yoshiaki Nitta
Application Number:
JP2002066651A
Publication Date:
October 08, 2008
Filing Date:
March 12, 2002
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H01M4/66; H01M4/13; H01M4/134; H01M4/1393; H01M4/1395; H01M4/38; H01M4/80; H01M10/05; H01M10/052; H01M10/058
Domestic Patent References:
| JP11233116A | | | | |
| JP2003157833A | | | | |
| JP9213307A | | | | |
Attorney, Agent or Firm:
Kazuo Ishii
Shinichi Kawasaki
