期刊
ACS NANO
卷 9, 期 5, 页码 5299-5309出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b00817
关键词
germanium oxide; mesoporous materials; block copolymer; catalytic function; lithium-ion batteries
类别
资金
- Basic Research Program through National Research Foundation (NRF) - Ministry of Science, ICT and Future Planning [2012R1A2A2A01002879, 2013R1A1A2074550]
- project Technology Development of Marine Industrial Biomaterials - Ministry of Oceans and Fisheries, Korea
- National Research Foundation of Korea [2012R1A2A2A01002879, 2013R1A1A2074550] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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