期刊
ELECTROCHIMICA ACTA
卷 178, 期 -, 页码 336-343出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.08.002
关键词
SnO2 nanosheets; nickel/polyvinylidene fluoride conductive fiber; anode materials; lithium ion batteries
资金
- national natural science foundation of China [21174119]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- Research Foundation of Education Bureau of Hunan Province, China [15B233]
In this report, we have designed a novel SnO2 nanosheets/nickel/polyvinylidene fluoride ternary composite as anode materials for lithium ion batteries. The SnO2 nanosheets are uniformly coated on the surface of nickel/polyvinylidene fluoride conductive fiber, as confirmed by XRD, SEM, and TEM characterizations. As an anode material for lithium ion batteries, this as-prepared ternary composite delivers a high capacity of 865.4 mAh g(-1) at 200 mA g(-1) after 60 cycles. Furthermore, the SnO2 in this composite material exhibits a good capacity retention as well as rate capability. This result indicates the completely reversible reaction between Li4.4Sn and SnO2, greatly improving the specific capacity of SnO2. The ternary SnO2/Ni/PVDF composite limits the volume expansion on lithium insertion, and buffer spaces during charge/discharge, resulting in the excellent cyclic performances. (C) 2015 Elsevier Ltd. All rights reserved.
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