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Kim, Youngsik
YK Research
Research Interests
  • Ionic conducting ceramic electrolyte membranes, energy conversion and storage materials and devices

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

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Title
Mesoporous Ge/GeO2/Carbon Lithium-Ion Battery Anodes with High Capacity and High Reversibility
Author
Hwang, JongkookJo, ChangshinKim, Min GyuChun, JinyoungLim, EunhoKim, SeongseopJeong, SanhaKim, YoungsikLee, Jinwoo
Issue Date
2015-05
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.9, no.5, pp.5299 - 5309
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/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
URI
https://scholarworks.unist.ac.kr/handle/201301/11808
URL
http://pubs.acs.org/doi/abs/10.1021/acsnano.5b00817
DOI
10.1021/acsnano.5b00817
ISSN
1936-0851
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