Title:
LITHIUM SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP3185113
Kind Code:
B2
Abstract:
PURPOSE: To provide a lithium secondary battery having an excellent charge/ discharge cycle characteristic and over discharge characteristic by using a lithium-including oxide for a positive electrode and a niobium pentoxide for a negative electrode.
CONSTITUTION: In a niobium pentoxide, because of entrance and exit of lithium to/from a crystal lattice thereof, physical expansion and contraction are hardly caused and therefore breakage of a negative electrode 3 due to a battery cycle is not generated, thus an excellent cycle characteristic is exhibited. Since a diffusion speed of lithium into a niobium pentoxide is large, rapid charging is possible. Since the niobium pentoxide is electrochemically stable even at a high potential as high as 4 volts, it can retain stability at an over discharge state and therefore exhibit an excellent battery characteristic even after over discharge.
Inventors:
Akikatsu Morita
Masanori Kitagawa
Masanori Kitagawa
Application Number:
JP33197991A
Publication Date:
July 09, 2001
Filing Date:
December 16, 1991
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H01M4/131; H01M10/05; H01M10/0525; H01M10/0566; (IPC1-7): H01M10/40; H01M4/02
Domestic Patent References:
| JP4324258A | ||||
| JP513080A |
Attorney, Agent or Firm:
Shigetaka Awano