Expanded graphite@SnO2@ polyaniline Composite with Enhanced Performance as Anode Materials for Lithium Ion Batteries

Expanded graphite@SnO2@ polyaniline Composite with Enhanced Performance as Anode Materials for Lithium Ion Batteries
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性能增强的膨胀石墨@SnO2@聚苯胺复合材料作为锂离子电池负极材料

DOI:
10.1016/j.electacta.2017.04.012
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发表时间:
2017-06
影响因子:
6.6
通讯作者:
Xianyou Wang
Xianyou Wang
中科院分区:
材料科学2区
文献类型:
--
作者:
Lingguang Yi;Li Liu;Guoxiong Guo;Xiaoying Chen;Yue Zhang;Shuyang Yu;Xianyou Wang

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体积的剧烈变化是限制氧化锡作为锂离子电池负极材料的主要缺点。本文采用溶剂热法和原位氧化聚合法制备了三维(3D)EG@SnO2@PANI复合材料。与裸SnO2和EG@SnO2相比,EG@SnO2@PANI样品的倍率性能和循环稳定性都有所提高,这可以归因于聚苯胺(PANI)和膨胀石墨(EG)的双重导电网络。结果表明,3DEG@SnO2@PANI复合材料不仅具有较高的初始正极效率77.8%,在0.1A−1电流密度下的1021mAhg−1的优异的初始可逆容量,而且在100次循环后仍保持在408mAhg−1。并且表现出更高的倍率性能,其倍率性能保持在270mAhg−1和2Ag−1。因此,制备EG@SnO2@PANI是开发锂电池SnO2负极材料的合适策略。
The drastic volume change is the major drawback limiting stannic oxide as an anode material for lithium ion batteries. In this work, three-dimensional (3D) EG@SnO2@PANI composite is synthesized via solvothermal method followed by in-situ oxidative polymerization. Compare with the bare SnO2and EG@SnO2samples, the rate performance and cycling stability of the EG@SnO2@PANI sample have been enhanced, which can be attributed to the dual conductive networks of polyaniline (PANI) with expanded graphite (EG). As a result, the 3D EG@SnO2@PANI composite not only delivers a higher initial columbic efficiency of 77.8%, an excellent initial reversible capacity of 1021 mAh g−1at a current density of 0.1 A g−1but also still maintains at 408 mAh g−1after 100 cycles. And it exhibits enhanced rate performance, which remains at 270 mAh g−1with 2 A g−1. Consequently, preparing EG@SnO2@PANI is a suitable strategy to develop SnO2anode materials for lithium batteries.
SnO2/石墨烯纳米复合材料的一步原位合成及其作为锂离子电池负极材料的应用
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