文献类型：期刊文献

英文题名：Self-assembled 3D flower-like Fe3O4/C architecture with superior lithium ion storage performance

作者：Wan, Lijia[1];Yan, Dong[1];Xu, Xingtao[1];Li, Jiabao[1];Lu, Ting[1];Gao, Yang[2];Yao, Yefeng[1];Pan, Likun[1]

机构：[1]East China Normal Univ, Shanghai Key Lab Magnet Resonance, Sch Phys & Mat Sci, Shanghai 200062, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2018

卷号：6

期号：48

起止页码：24940

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20185106255847);WOS:【SCI-EXPANDED(收录号:WOS:000453550700025)】；

基金：Financial support from the CAS Interdisciplinary Innovation Team, National Natural Science Foundation of China (No. 21574043) and Fundamental Research Funds for the Central Universities is gratefully acknowledged.

语种：英文

外文关键词：Scanning electron microscopy - Electric discharges - Anodes - X ray photoelectron spectroscopy - Self assembly - Field emission microscopes - High resolution transmission electron microscopy - X ray diffraction - Cyclic voltammetry - Fourier transform infrared spectroscopy - Electrochemical impedance spectroscopy - Gas adsorption - Carbonization - Charge transfer - Lithium-ion batteries

摘要：Fe3O4 with a high theoretical specific capacity is a promising anode material for lithium ion batteries (LIBs), but its severe volume variation during the electrochemical process and poor electrical conductivity limit its further applications. To solve these problems, in this work, a self-assembled flower-like Fe3O4/C architecture was successfully synthesized via a simple two-step method including a solvo-hydrothermal self-assembly process and a high temperature in situ carbonization process. Field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, nitrogen adsorption-desorption isotherms, galvanostatic charge/discharge tests, cyclic voltammetry and electrochemical impedance spectroscopy were used to investigate the morphology, structure and electrochemical performances of the samples, respectively. The flower-like Fe3O4/C showed a high discharge capacity of 1165.4 mA h g(-1) after 300 cycles at a current density of 277.2 mA g(-1) with excellent rate performances. The superior electrochemical performances were triggered primarily due to the incorporation of carbon into the Fe3O4 moiety comprising a hollow structure which can offer a high specific surface area and excellent charge transfer ability. The designed flower-like Fe3O4/C is a promising anode material for high-performance LIBs.