文献类型：期刊文献

英文题名：Controllable synthesis of RGO/FexOy nanocomposites as high-performance anode materials for lithium ion batteries

作者：Dong, Xiangmao[1];Li, Li[2];Zhao, Chongjun[1];Liu, Hua-kun[2];Guo, Zaiping[2]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

年份：2014

卷号：2

期号：25

起止页码：9844

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20142617870212);WOS:【SCI-EXPANDED(收录号:WOS:000337774100051)】；

基金：Financial support was provided by the National Natural Science Foundation of China (no. 20504026), the Shanghai Natural Science Foundation (no. 13ZR1411900), the Shanghai Leading Academic Discipline Project (B502), and the Shanghai Key Laboratory Project (08DZ2230500). The authors would like to thank Dr Tania Silver for critical reading of the manuscript.

语种：英文

外文关键词：Nanocomposites - Powder metals - Hydrothermal synthesis - Anodes - Graphene - Ions - Lithium-ion batteries

摘要：Graphene/metal oxide composites have attracted considerable attention for various applications, such as energy storage, catalysts, and electronics, however, the lack of effective and environmentally friendly fabrication methods for obtaining uniform graphene/metal oxide nanocomposites on a large scale has been one of the main technical barriers to real applications. We have developed a simple, efficient, and environmentally benign approach to the synthesis of reduced graphene oxide (RGO)/metal oxide composites via hydrothermal reaction of graphene oxide and metal powder under mild reaction conditions. For iron oxide as an example, by controlling the ratio of graphene oxide to Fe powder (m(GO)/m(Fe)), the hydrothermal temperature, and the addition of a mild oxidizing/reducing agent, the valence of Fe in the iron oxide products can be well tuned, i.e., various iron oxide/RGO composites, including RGO/Fe3O4, RGO/Fe3O4/Fe2O3, and RGO/Fe2O3, could be synthesized. RGO/FexOy composites in this study deliver a Li-ion storage capacity of 988.5 mA h g(-1) at a current density of 100 mA g(-1). After cycling at 500 mA g(-1) for 300 cycles, a capacity of 868.4 mA h g(-1) can still be maintained (with no capacity decay). When the current density is 2000 mA g(-1), the capacity of 657.0 mA h g(-1) is still retained, showing superior rate capability. The work described here provides a promising pathway to construct various graphene-based metal oxides as electrode materials for Li-ion batteries.