期刊
MATERIALS RESEARCH BULLETIN
卷 48, 期 10, 页码 4112-4117出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2013.06.041
关键词
Composite; Nanostructures; Chemical synthesis; Electrochemical properties
资金
- National Natural Science Foundation of China [51001089, 51271169]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20100101120026]
- Key Science and Technology Innovation Team of Zhejiang Province [2010R50013]
A facile and low-temperature method is developed for SnO2/graphene composite which involves an ultrasonic-assistant oxidation-reduction reaction between Sn2+ and graphene oxide in a choline chloride-ethylene glycol based ionic liquid under ambient conditions. The reaction solution is non-corrosive and environmental-friendly. Moreover, the proposed technique does not require complicated infrastructures and heat treatment. The SnO2/graphene composite consists of about 4 nm sized SnO2 nanoparticles with cassiterite structure mono-dispersed on the surface of reduced graphene oxide. As anode for lithium-ion batteries, the SnO2/graphene composite shows a satisfying cycling stability (535 mAh g(-1) after 50 cycles @100 mA g(-1)), which is significantly prior to the bare 4 nm sized SnO2 nanocrsytals. The graphene sheets in the hybrid nanostructure could provide a segmentation effect to alleviate the volume expansion of the SnO2 and restrain the small and active Sn-based particles aggregating into larger and inactive clusters during cycling. (c) 2013 Elsevier Ltd. All rights reserved.
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