Enhancing Sodium Ion Battery Performance by Strongly Binding Nanostructured Sb2S3 on Sulfur-Doped Graphene Sheets
Enhancing Sodium Ion Battery Performance by Strongly Binding Nanostructured Sb2S3 on Sulfur-Doped Graphene Sheets
复制标题
通过在掺硫石墨烯片上强结合纳米结构 Sb2S3 来增强钠离子电池性能。
DOI：
10.1021/acsnano.6b05653
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发表时间：
2016
期刊：
影响因子：
17.1
通讯作者：
Liu Meilin
中科院分区：
文献类型：
--
作者：
Xiong Xunhui;Wang Guanhua;Lin Yuwei;Wang Ying;Ou Xing;Zheng Fenghua;Yang Chenghao;Wang Jeng Han;Liu Meilin
钠离子电池（SIB）被认为是锂离子电池的有前途的替代品，用于大规模能量存储。然而，其较差的电化学性能，特别是循环性能，成为进一步发展SIB的主要挑战。大的体积变化和缓慢的扩散动力学通常被认为是快速容量退化的原因。在这里，我们报告了硫掺杂石墨烯片（Sb 2S 3/SGS）上纳米结构Sb 2S 3的强化学键合，其能够在900次循环中保持83%的稳定容量保持率，具有高容量和优异的倍率性能。据我们所知，Sb 2S 3/SGS复合材料的循环性能上级用于SIB的任何其他Sb基材料的循环性能。计算结果表明，硫掺杂石墨烯（SGS）比纯石墨烯对Sb 2S 3和放电产物具有更强的亲和力，从而形成具有出色循环稳定性的稳健复合结构。我们的研究为解决SIB的长期循环稳定性问题提供了一种可行而有效的方法。
Sodium ion batteries (SIBs) have been considered a promising alternative to lithium ion batteries for large-scale energy storage. However, their inferior electrochemical performances, especially cyclability, become the major challenge for further development of SIBs. Large volume change and sluggish diffusion kinetics are generally considered to be responsible for the fast capacity degradation. Here we report the strong chemical bonding of nanostructured Sb2S3 on sulfur-doped graphene sheets (Sb2S3/SGS) that enables a stable capacity retention of 83% for 900 cycles with high capacities and excellent rate performances. To the best of our knowledge, the cycling performance of the Sb2S3/SGS composite is superior to those reported for any other Sb-based materials for SIBs. Computational calculations demonstrate that sulfur-doped graphene (SGS) has a stronger affinity for Sb2S3 and the discharge products than pure graphene, resulting in a robust composite architecture for outstanding cycling stability. Our study shows a feasible and effective way to solve the long-term cycling stability issue for SIBs.