Germanium sulfide(II and IV) nanoparticles for enhanced performance of lithium ion batteries.

Yong Jae Cho, Hyung Soon Im, Yoon Myung, Chang Hyun Kim, Han Sung Kim, Seung Hyuk Back, Young Rok Lim, Chan Su Jung, Dong Myung Jang, Jeunghee Park, Eun Hee Cha, Sung Ho Choo, Min Seob Song, Won Il Cho

Index: Chem. Commun. (Camb.) 49(41) , 4661-3, (2013)

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Abstract

Germanium sulfide (GeS and GeS2) nanoparticles were synthesized by novel gas-phase laser photolysis and subsequent thermal annealing. They showed excellent cycling performance for lithium ion batteries, with a maximum capacity of 1010 mA h g(-1) after 100 cycles. Metastable tetragonal phase Ge nanoparticles were suggested as active materials for a reversible lithium insertion-extraction process.