期刊
MATERIALS LETTERS
卷 91, 期 -, 页码 16-19出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2012.09.067
关键词
Nanocomposites; Energy storage and conversion; Tin oxide; Cycling stability; Graphene
资金
- National Natural Science Foundation of China [51102213]
We report a tailored synthesis of tin oxide-graphene nanocomposites with variety in oxide phase structure and composition through the control of oxidation-reduction hydrothermal reaction between graphene oxide and Sn2+. The amount ratio of graphene oxide to SnCl2 is critical to achieve either SnO/SnO2-graphene or pure SnO2-graphene composites, which are electrochemically evaluated as the anode materials in lithium ion batteries. It is found that the phase structure and composition play a key role in the lithium ion storage ability. A superior cycling performance is obtained when the nanocomposites exist in pure SnO2-graphene (mass percentage of SnO2: 68%) after 90 cycles, with a reversible capacity of 525 mA h g(-1) and an ultra-low capacity loss of similar to 0.3% per cycle. (c) 2012 Elsevier B.V. All rights reserved.
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