US Patent:
20040234860, Nov 25, 2004
Inventors:
Deyang Qu - Madison WI, US
Trevor Marshall - Oregon WI, US
Ken Redding - Boscobel WI, US
Tom Michaelis - Madison WI, US
David Mihara - Madison WI, US
Chris Garber - Lodi WI, US
International Classification:
H01M004/62
H01M004/50
US Classification:
429/232000, 429/224000, 252/182100
Abstract:
An electrochemical cell is provided whose cathode includes a graphite mixture having regular graphite and modified graphite having an average surface area greater than that of the regular graphite. The modified graphite has an aspect ratio greater than or equal to 1.2, and may be present at a concentration less than 25% relative to the graphite mixture.