Mesoporous Ge/GeO2/Carbon Lithium-Ion Battery Anodes with High Capacity and High Reversibility

• DOI: 10.1021/acsnano.5b00817
• Publication Date: 2015-04-13T21:23:07Z
• Authors: Jongkook Hwang; Changshin Jo; Min Gyu Kim; Jinyoung Chun; Eunho Lim; Seongseop Kim; Sanha Jeong; Youngsik Kim; Jinwoo Lee
• Keywords: Carbon fibers

We report mesoporous composite materials (m-GeO2, m-GeO2/C, and m-Ge-GeO2/C) with large pore size which are synthesized by a simple block copolymer directed self-assembly. m-Ge/GeO2/C shows greatly enhanced Coulombic efficiency, high reversible capacity (1631 mA h g(-1)), stable cycle life compared the other bulk GeO2 electrodes. exhibits one of highest areal capacities (1.65 cm(-2)) among previously reported Ge- GeO2-based anodes. The superior electrochemical performance in arises from highly improved kinetics conversion reaction due to synergistic effects structures conductive carbon metallic Ge.