High-Purity Fe3S4 Greigite Microcrystals for Magnetic and Electrochemical Performance
详细信息 查看全文
- 作者：Guowei Li ; Baomin Zhang ; Feng Yu ; Alla A. Novakova ; Maxim S. Krivenkov ; Tatiana Y. Kiseleva ; Liao Chang ; Jiancun Rao ; Alexey O. Polyakov ; Graeme R. Blake ; Robert A. de Groot ; Thomas T. M. Palstra
- 刊名：Chemistry of Materials
- 出版年：2014
- 出版时间：October 28, 2014
- 年：2014
- 卷：26
- 期：20
- 页码：5821-5829
- 全文大小：489K
- ISSN：1520-5002
文摘
High-purity Fe3S4 (greigite) microcrystals with octahedral shape were synthesized via a simple hydrothermal method using a surfactant. The as-prepared samples have the inverse spinel structure with high crystallinity. The saturation magnetization (Ms) reaches 3.74 渭B at 5 K and 3.51 渭B at room temperature, which is larger than all reported values thus far. Electrical transport measurements show metallic behavior with a resistivity 40 times lower than in any previous report. The potential use of greigite as an anode in lithium-ion batteries was investigated by cyclic voltammery and galvanostatic discharge鈥揷harge cycling on as-prepared samples. The discharge capacity was 1161 mAh/g in the first cycle and 563 mAh/g in the 100th cycle. This excellent electrochemical performance can be attributed to the high purity, crystallinity, and favorable morphology of the products.