期刊
CHEMSUSCHEM
卷 7, 期 10, 页码 2914-2922出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201402304
关键词
anode materials; carbon nanofibers; electrospinning; germanium; nitrogen
资金
- National Natural Science Foundation of China [21271023, 91022006]
- 111 Project [B07012]
Alloyed anode materials for lithium-ion batteries (LIBs) usually suffer from considerable capacity losses during charge-discharge process. Herein, insitu-grown germanium clusters are homogeneously encapsulated into porous nitrogen-doped carbon nanofibers (N-CNFs) to form Ge/N-CNFs hybrids, using a facile electrospinning method followed by thermal treatment. When used as anode in LIBs, the Ge/N-CNFs hybrids exhibit excellent lithium storage performance in terms of specific capacity, cycling stability, and rate capability. The excellent electrochemical properties can be attributed to the unique structural features: the distribution of the germanium clusters, porous carbon nanofibers, and GeN chemical bonds all contribute to alleviating the large volume changes of germanium during the discharge-charge process, while at same time the unique porous N-CNFs not only increase the contact area between the electrode and the electrolyte, but also the conductivity of the hybrid.
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