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Doped carbon-sulfur species nanocomposite cathode for Li--S batteries

United States Patent

9,225,011
December 29, 2015
View the Complete Patent at the US Patent & Trademark Office
We report a heteroatom-doped carbon framework that acts both as conductive network and polysulfide immobilizer for lithium-sulfur cathodes. The doped carbon forms chemical bonding with elemental sulfur and/or sulfur compound. This can significantly inhibit the diffusion of lithium polysulfides in the electrolyte, leading to high capacity retention and high coulombic efficiency.
Wang; Donghai (State College, PA), Xu; Tianren (State College, PA), Song; Jiangxuan (State College, PA)
THE PENN STATE RESEARCH FOUNDATION (University Park, PA)
13/ 938,527
July 10, 2013
GOVERNMENT SPONSORSHIP This invention was made with government support under Grant No. DE-EE0005475, awarded by the Department of Energy. The Government has certain rights in the invention.