Controlled growth of uniform nanoflakes-built pyrite FeS2 microspheres and their electrochemical properties

被引：22
作者：
Wang, Dewei [1 ,3 ]
Wu, Minghao [2 ,3 ]
Wang, Qihua [1 ]
Wang, Tingmei [1 ]
Chen, Jian [2 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
[2] Chinese Acad Sci, Dalian Inst Chem Phys, Lab Adv Rechargeable Batteries, Dalian 116023, Peoples R China
[3] Chinese Acad Sci, Grad Sch, Beijing 10039, Peoples R China
来源：
IONICS | 2011年 / 17卷 / 02期
关键词：
Cathodes; Electrochemical characterizations; Lithium batteries; HYDROTHERMAL SYNTHESIS; MAGNETIC-PROPERTIES;
D O I：
10.1007/s11581-010-0485-3
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：163 / 167
页数：5
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