Two-dimensional nanocomposites based on tungsten oxide nanoplates and graphene nanosheets for high-performance lithium ion batteries
Two-dimensional nanocomposites based on tungsten oxide nanoplates and graphene nanosheets for high-performance lithium ion batteries
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DOI：
10.1016/j.electacta.2015.02.121
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发表时间：
2015-05-01
影响因子：
6.6
通讯作者：
Park, Kyung-Won
中科院分区：
文献类型：
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作者：
Kim, Da-Mi;Kim, Si-Jin;Park, Kyung-Won
基于活性材料和石墨烯的良好定义的纳米复合电极具有改进的锂离子反应性能，如锂离子插入/丢弃反应、循环寿命和高速率性能。在这里，我们报道了由WO3纳米板和石墨烯纳米片（GNS）组成的二维纳米复合材料，采用水热法和加热工艺用于高性能锂离子电池。XRD、SEM和TEM分析表明，复合材料由高晶WO3纳米片和GNS组成。利用硬币电池对纳米复合材料作为锂离子电池负极的容量和高倍率循环性能进行了评价。优化后的纳米复合电极具有高可逆容量、良好的容量保持性和优异的高倍率循环性能。(C) 2015 Elsevier Ltd.版权所有。
Well-defined nanocomposite electrodes based on active materials and graphene have been known to hold improved lithium ion reaction properties such as the lithium ion insertion/desertion reaction, cycle life, and high rate performance. Here, we report two-dimensional nanocomposites consisting of WO3 nanoplates and graphene nanosheets (GNS) using a hydrothermal method and heating process for use in high-performance lithium ion batteries. A compilation of the data from XRD, SEM, and TEM suggests that the nanocomposites consist of high crystalline WO3 nanoplates and GNS. The capacity and high rate cycling performance of the nanocomposites as an anode for lithium ion batteries are evaluated using coin cells. The nanocomposite electrode with an optimized amount of GNS exhibits high reversible capacity, good capacity retention, and excellent high rate cycling performance. (C) 2015 Elsevier Ltd. All rights reserved.