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SnO2 nanoparticles anchored on graphene oxide as advanced anode materials for high-performance lithium-ion batteries |
Ruiping LIU( ), Ning ZHANG, Xinyu WANG, Chenhui YANG, Hui CHENG, Hanqing ZHAO |
Department of Materials Science and Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China |
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Abstract Lithium-ion batteries (LIBs) with high energy density have attracted great attention for their wide applications in electric vehicles, and the exploration of the next-generation anode materials with high theoretical capacity is highly desired. In this work, SnO2 nanoparticles with the particle size of 200 nm uniformly anchored on the surface of graphene oxide (GO) was prepared by combination of the ultrasonic method and the following calcination process. The SnO2/GO composite with the weight ratio of SnO2 to GO at 4:1 exhibits excellent electrochemical performance, which originates from the synergistic effects between GO and SnO2 nanoparticles. A high discharge capacity of 492 mA·h·g−1 can be obtained after 100 cycles at 0.2C, and after cycling at higher current densities of 1C and 2C, a discharge capacity of 641 mA·h·g−1 can be restored when the current density goes back to 0.1C. The superior electrochemical performance and simple synthesis process make it a very promising candidate as anode materials for LIBs.
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Keywords
lithium-ion battery
SnO2
graphene oxide
anode material
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Corresponding Author(s):
Ruiping LIU
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Online First Date: 12 June 2019
Issue Date: 19 June 2019
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