Cu2O/graphene oxide composite nanosheet as anode material for lithium-ion batteries
In this paper,cuprous oxide nanosheets/graphene oxide composites (Cu2O-GO) are prepared using a simple solution approach and subsequent annealing at 400 ℃.The morphology and structure of as-prepared Cu2O/GO are characterized by scanning electron microscopy (SEM),transmission electron microscopy (TEM) and X-ray diffraction (XRD).It is found that the Cu2O nanosheets with the average size of ca.200 nm and average thickness of ca.20 nm are layed homogeneously and anchored closely on the graphene oxide (GO) surface.The composite,used as the anode materials,exhibits excellent electrochemical performance.The reversible capacity is up to ca.447.5 mAhg-1 at 50mAg-1,and the corresponding coulombic efficiency is about 60%.At the higher current densities of 500 and lOOOmAg-1,the reversible capacity can reach 346.5 and 301.2mAhg-1 respectively.The excellent elec-trochemical performance should be attributed to the 2D laminated structure of Cu20 as well as close connection between graphene and Cu2O: (1) 2D laminated structure of Cu2O can withstand more impact from the insertion/desertion of lithium-ion compared with other structures such as nanoparticles.(2) Both the 2D structures and close connection make the conductive network of GO and Cu2O more stable.Therefore,the Cu2O-GO shows the great potential for application in the anode.
Cu2O graphene oxide lithium-ion batteries
ZHANG Xiao-ting ZHOU Ji-sheng LI Jing-ming SONG Huai-he CHEN Xiao-hong
State Key Laboratory of Chemical Resource Engineering,Key Laboratory of Carbon Fiber and Functional Polymers,Ministry of Education,Beijing University of Chemical Technology,Beijing 100029,PR China
国内会议
太原
英文
347-350
2013-08-16（万方平台首次上网日期，不代表论文的发表时间）