Phase transition of hollow-porous α-Fe2O3 microsphere based anodes for lithium ion batteries during high rate cycling

被引：53
作者：
Hao, Shiji [1 ]
Zhang, Bowei [2 ]
Ball, Sarah [3 ]
Wu, Junsheng [4 ]
Srinivasan, Madhavi [1 ,2 ]
Huang, Yizhong [1 ,2 ]
机构：
[1] Nanyang Technol Univ, Energy Res Inst, Singapore 639798, Singapore
[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
[3] Johnson Matthey Technol Ctr, Reading RG4 9NH, Berks, England
[4] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2016年 / 4卷 / 42期
关键词：
HIGH-PERFORMANCE ANODES; ELECTROCHEMICAL PERFORMANCE; ALKYL-CARBONATES; FACILE SYNTHESIS; STAINLESS-STEEL; VISCOSITY; STORAGE; NANOPARTICLES; CONDUCTIVITY; CAPABILITY;
D O I：
10.1039/c6ta07131g
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：
In the present paper, hollow-porous alpha-Fe2O3 microspheres are prepared via cation etching of zinc citrate microspheres and subsequent thermal treatment. The superior performance of the as-obtained alpha-Fe2O3 microspheres as an anode material for lithium ion batteries is evaluated. After 1000 cycles, the capacity still remains more than 1100 mA h g(-1) at a current rate of 1 A g(-1). Meanwhile, the crystal size induced phase transition of Fe2O3 microspheres (alpha -> gamma -> beta) is observed during cycling by the measurements of ex situ XRD and TEM, which is responsible for their abnormal performance fluctuation.
引用
收藏
页码：16569 / 16575
页数：7
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