期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 684, 期 -, 页码 419-427出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.05.185
关键词
Nano-heterostructure; Deposition technique; Lithium-ion batteries; Electrochemical properties; Synergistic effect
资金
- National Natural Science Foundation of China [51472211]
- Scientific and Technical Achievement Transformation Fund of Hunan Province [2012CK1006]
- Key Project of Strategic New Industry of Hunan Province [2013GK4068]
- Natural Science Foundation of Hunan Province [2015JJ6103]
- Program for Innovative Research Cultivation Team in University of Ministry of Education of China [1337304]
- China Scholarship Council (CSC)
Stem-like nano-heterostructural MWCNTs/alpha-Fe2O3@TiO2 (MCFT) composite, which is composed of TiO2 coated alpha-Fe2O3 nanoparticles firmly and uniformly anchored on multi-walled carbon nanotubes (MWCNTs), has been successfully fabricated via a facile layer-by-layer deposition technique and further investigated as the anode material for lithium-ion batteries (LIBs). It has been found that the as-obtained MCFT composite exhibits greatly improved electrochemical properties with satisfactory cyclability, admirable rate capability and favorable specific capacity for high-performance LIBs in comparison to MWCNTs/alpha-Fe2O3 (MCF), originating from a synergistic effect of highly electric conductivity with good flexibility of MWCNTs, excellent structural stability of TiO2, and extraordinarily high theoretical capacity of alpha-Fe2O3. Specifically, it is capable of delivering a reversible capacity of as high as 770 mAh g(-1) at 200 mA g(-1) after 200 cycles and exhibiting a steady discharge capacity of 670 mAh g(-1) even cycled at a large current density of 1000 mA g(-1). (C) 2016 Elsevier B.V. All rights reserved.
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