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

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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/GeO(2)2/C shows greatly enhanced Coulonnbic 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.
Publisher
AMER CHEMICAL SOC
Issue Date
2015-05
Language
English
Article Type
Article
Citation

ACS NANO, v.9, no.5, pp.5299 - 5309

ISSN
1936-0851
DOI
10.1021/acsnano.5b00817
URI
http://hdl.handle.net/10203/245039
Appears in Collection
CBE-Journal Papers(저널논문)
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