文献类型：期刊文献

英文题名：A facile route to synthesize transition metal oxide/reduced graphene oxide composites and their lithium storage performance

作者：Zhao, Chongjun[1,2,4];Chou, Shu-Lei[1];Wang, Yunxiao[1];Zhou, Cuifeng[3];Liu, Hua-Kun[1,4];Dou, Shi-Xue[1]

机构：[1]Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia;[2]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;[3]Univ Sydney, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia;[4]Univ Wollongong, ARC Ctr Excellence Electromat Sci, Wollongong, NSW 2522, Australia

年份：2013

卷号：3

期号：37

起止页码：16597

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20133716722420);WOS:【SCI-EXPANDED(收录号:WOS:000323842900054)】；

基金：Financial support was provided by the Australian Research Council (ARC) through a Discovery Project (DP110103909) and the ARC Center of Excellence for Electromaterials Science (CE0561616), the National Natural Science Foundation of China (No. 20504026), Shanghai Natural Science Foundation 13ZR1411900, the Shanghai Nanotechnology Promotion Center (No. 11nm0507000), a Shanghai Leading Academic Discipline Project (B502), and a Shanghai Key Laboratory Project (08DZ2230500). The authors also want to thank Dr T. Silver for critical reading of the manuscript.

语种：英文

外文关键词：High resolution transmission electron microscopy - Graphene - Scanning electron microscopy - X ray photoelectron spectroscopy - Hematite - II-VI semiconductors - Transition metal oxides - Powder metals - Transition metals - Lithium - Manganese oxide - X ray diffraction

摘要：Transition metal oxide (Mn3O4, Fe2O3, Co3O4, and ZnO) and reduced graphene oxide (RGO) composites were successfully synthesized via a hydrothermal method using the direct reaction between the corresponding metal powder and graphene oxide (GO). In this process, the GO can be reduced by transition metal powder in water, and the nanosized metal oxide can be obtained, and homogeneously mixed with and wrapped by RGO to form a metal oxide/RGO composite at the same time. X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and scanning and transmission electron microscopy were used to characterize the as-prepared materials. The different experimental parameters, including reactants, solvents, atmosphere inside the autoclave, temperature, and reaction time, were investigated for their effects on the phase of the products. Furthermore, as an example, the lithium storage properties of Fe2O3/RGO and Co3O4/RGO composites were also investigated. The electrochemical performance shows both good cycling stability (similar to 852 mA h g(-1) up to 200 cycles) and high rate capability (425 mA h g(-1) at the 4 C rate). This can be attributed to the novel RGO-wrapped composite structure, which can buffer the volume changes and maintain good electrical conductivity.