期刊
JOURNAL OF POWER SOURCES
卷 286, 期 -, 页码 124-129出版社
ELSEVIER
DOI: 10.1016/j.jPowsour.2015.03.151
关键词
Hematite; Shape-controllable synthesis; Single crystal; Electrochemical performance; Lithium ion batteries
资金
- Program for NSFC [51302325, 51201115, 51471121]
- New Century Excellent Talents in University [NCET-12-0553]
- Program for Shenghua Overseas Talent from Central South University [1681-7607030005]
- Hubei Provincial Natural Science Foundation [2014CFB261]
- Open-End Fund for the Valuable and Precision Instruments of Central South University [CSUZC2014032]
Understanding the correlation between the desired morphology of nanostructures and its electrochemical properties is a prerequisite for widespread application of advanced energy materials. Herein, two types of tetragonal alpha-Fe2O3 single crystals with a mean size of ca. 200 nm, including cubic and thorhombic shapes, have been synthesized via a facile hydrothermal approach. The as-obtained shape of alpha-Fe2O3 nanocrystals depends on the addition of the metal ions precursor, the Zn2+ ions result in the cubic shape and the Cu2+ ions result in the thorhombic shape, respectively. These two different tetragonal alpha-Fe2O3 a single crystals are used as anode materials for lithium ion batteries (LIBs), and the results reveal that cubic alpha-Fe2O3 single crystal exhibits a better performance than thorhombic alpha-Fe2O3 single crystal. The discharge capacity of cubic alpha-Fe2O3 single crystal is up to 1028 mAh/g, and the current density is up to 1000 mA/g (1C) after 222 cycles. Clearly, the alpha-Fe2O3 single crystal with controlled shapes would improve the electrochemical performance of LIBs as superior anode materials, and this approach could pave a way to develop high performance LIBs. (C) 2015 Elsevier B.V. All rights reserved.
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