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Mesoporous Ge/GeO2/Carbon Lithium-Ion Battery Anodes with High Capacit…

Year of publication
Title of paper
Mesoporous Ge/GeO2/Carbon Lithium-Ion Battery Anodes with High Capacity and High Reversibility
Author
[이진우교수 연구실]
Publication in journal
ACS Nano 9(5), pp 5299-5309 (April 2015)
Publication date
20150413
 
[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.
DOI: 10.1021/acsnano.5b00817