Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LITHIUM POLYMER SECONDARY BATTERY AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2004/001878
Kind Code:
A1
Abstract:
Lithium polymer secondary batteries employing a solid polymer electrolyte layer obtained through crosslinking with energy such as heat or light have a low discharge capacity at temperatures as low as, e.g., -20°C. It is hence desired to improve the low-temperature characteristics without causing capacity deterioration even when charge-discharge cycling is repeated. The lithium polymer secondary battery comprises: a solid polymer electrolyte layer comprising a separator (excluding nonwoven fabrics) and an organic electrolytic solution united therewith through crosslinking; and a positive electrode and a negative electrode each obtained by uniting the organic electrolytic solution with an active material through crosslinking. This lithium polymer secondary battery has a constitution in which the organic electrolytic solution contains &gammad -butyrolactone and the solid polymer electrolyte layer has a light transmittance of 50% or higher.

Inventors:
NISHIMURA NAOTO (JP)
TORATA NAOTO (JP)
UI KOUICHI (JP)
NISHIJIMA MOTOAKI (JP)
Application Number:
PCT/JP2003/003120
Publication Date:
December 31, 2003
Filing Date:
March 14, 2003
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SHARP KK (JP)
NISHIMURA NAOTO (JP)
TORATA NAOTO (JP)
UI KOUICHI (JP)
NISHIJIMA MOTOAKI (JP)
International Classes:
C08G65/332; C08L71/02; H01M10/052; H01M10/0565; H01M10/36; H01M50/409; H01M50/489; H01M50/491; (IPC1-7): H01M2/16; H01M10/40; C08G65/332; C08J9/36
Foreign References:
JP2002025619A2002-01-25
JP2002110243A2002-04-12
JP2002158038A2002-05-31
JP2002367677A2002-12-20
JP2002329529A2002-11-15
JP2002319434A2002-10-31
JP2002313426A2002-10-25
JP2002313425A2002-10-25
JP2003109665A2003-04-11
JP2003092140A2003-03-28
JP2002110244A2002-04-12
JP2001068158A2001-03-16
JP2000228221A2000-08-15
JPH11288738A1999-10-19
JPH10223044A1998-08-21
Attorney, Agent or Firm:
Nogawa, Shintaro (1-3 Nishitenma 5-chome, Kita-k, Osaka-shi Osaka, JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: ELECTROLYTES FOR ELECTROOPTIC DEVICES COMPRISING IONIC LIQUIDS

Next Patent: CARBON-COATED LI-CONTAINING POWDERS AND PROCESS FOR PRODUCTION THEREOF