期刊
IONICS
卷 17, 期 2, 页码 163-167出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-010-0485-3
关键词
Cathodes; Electrochemical characterizations; Lithium batteries
资金
- National 973 project of China [2007CB607606]
- Innovative Group Foundation from NSFC [50721062]
- Chinese Academy of Sciences [KGCX3-SYW-205]
Nanoflakes-built pyrite FeS2 microspheres were synthesized through a simple solvothermal process in mixed solvents of N, N-dimethytformamide and ethylene glycol without using any surfactant. Both the composition of the solvents and urea were key factors for the formation of the uniform products. It was found that the flake-like intermediate products transformed into FeS2 nanoflakes in situ in the early stage and Ostwald ripening growth mechanism would contribute to the uniformity of the final products. Electrochemical studies revealed that the nanoflakes-built pyrite FeS2 microspheres exhibited large lithium storage capacities. This method can be easily controlled and is expected to be extendable to the fabrication of other metal chalcogenides with controlled shape and structure.
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