Abstract |
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)), and stable cycle life compared with the other mesoporous and bulk GeO2 electrodes. m-Ge/ GeO2/C exhibits one of the highest areal capacities (1.65 mA h cm(-2)) among previously reported Ge- and GeO2-based anodes. The superior electrochemical performance in m-Ge/ GeO2/C arises from the highly improved kinetics of conversion reaction due to the synergistic effects of the mesoporous structures and the conductive carbon and metallic Ge.
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Authors | Jongkook Hwang, Changshin Jo, Min Gyu Kim, Jinyoung Chun, Eunho Lim, Seongseop Kim, Sanha Jeong, Youngsik Kim, Jinwoo Lee |
Journal | ACS nano
(ACS Nano)
Vol. 9
Issue 5
Pg. 5299-309
(May 26 2015)
ISSN: 1936-086X [Electronic] United States |
PMID | 25867753
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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