期刊
JOURNAL OF POWER SOURCES
卷 282, 期 -, 页码 257-264出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.02.058
关键词
Chemical vapor deposition; Bi-morphology; Iron oxide; Anode; Lithium-ion batteries
资金
- National Natural Science Foundation of PR China [51025102, 51371158]
- Natural Science Foundation of Zhejiang Province [LY14E010004]
- Program for Innovative Research Team in University of Ministry of Education of PR China [IRT13037]
Carbon coated Fe3O4 composite (Fe3O4@C) with bi-morphological architecture has been prepared via a chemical vapor deposition at 450 degrees C from Fe2O3 nanoparticles by using acetylene as the deposition vapor and carbon source. The Fe2O3 are fully reduced to Fe3O4 in a 10 min of deposition, showing submicronsized octahedral Fe3O4 particles coated partially with a thin carbon layer mainly, and a few nano-sized Fe3O4 particles coated with carbon also. The deposition period of 20 min results in a further growth of the octahedral Fe3O4 particles and a reduction of the number of the nano-sized ones, correlating to a thick and fully coated carbon layer. Impurities of iron carbides generate in the composite with further prolonging the deposition to 30 min. The Fe3O4@C composite from 20 min of deposition shows superior electrochemical property to others. An initial reversible capacity of 570 mAh g(-1) is obtained and the capacity fading is less than 5% after 60 cycles. The fabrication method is facile and time-saving. Such submicron size-predominated Fe3O4@C composite is hopefully not only favorable in alleviating the agglomeration of the iron oxide during cycling, but also helpful in getting high packing density of the anode material. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据