Room-Temperature-Cured Copolymers for Lithium Battery Gel Electrolytes
TBMG-5178
05/01/2009
- Content
Polyimide-PEO copolymers (“PEO” signifies polyethylene oxide) that have branched rod-coil molecular structures and that can be cured into film form at room temperature have been invented for use as gel electrolytes for lithium-ion electric- power cells. These copolymers offer an alternative to previously patented branched rod-coil polyimides that have been considered for use as polymer electrolytes and that must be cured at a temperature of 200 °C. In order to obtain sufficient conductivity for lithium ions in practical applications at and below room temperature, it is necessary to imbibe such a polymer with a suitable carbonate solvent or ionic liquid, but the high-temperature cure makes it impossible to incorporate and retain such a liquid within the polymer molecular framework. By eliminating the high-temperature cure, the present invention makes it possible to incorporate the required liquid.
- Citation
- "Room-Temperature-Cured Copolymers for Lithium Battery Gel Electrolytes," Mobility Engineering, May 1, 2009.