Bismuth Nanoparticles Embedded in Carbon Spheres as Anode Materials for Sodium/Lithium-Ion Batteries
Bismuth Nanoparticles Embedded in Carbon Spheres as Anode Materials for Sodium/Lithium-Ion Batteries
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DOI：
10.1002/chem.201503272
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发表时间：
2016-02-12
影响因子：
4.3
通讯作者：
Li, Jie
中科院分区：
文献类型：
--
作者：
Yang, Fuhua;Yu, Fan;Li, Jie
由于钠的陆地储量丰富，钠离子电池（SIB）被认为是大规模商业应用中锂离子电池（LIB）的有吸引力的替代品。出口合适的负极材料是SIB和LIB发展的关键。在这篇文章中，我们报告了使用气溶胶喷雾热解技术制造 Bi@C 微球。当用作SIBs负极材料时，Bi@C微球在100mAg(-1)下循环100次后仍具有123.5mAhg(-1)的高容量。倍率性能也令人印象深刻（在0.1、0.2、0.5、1和2Ag(-1)电流密度下分别获得299、252、192、141和90mAhg(-1)的比容量）。此外，Bi@C微球也被证明是合适的LIB负极材料。 SIB和LIB的优异电化学性能可归因于Bi@C微球结构，其中Bi纳米颗粒均匀分散在碳球中。
Sodium-ion batteries (SIBs) are regarded as an attractive alternative to lithium-ion batteries (LIBs) for large-scale commercial applications, because of the abundant terrestrial reserves of sodium. Exporting suitable anode materials is the key to the development of SIBs and LIBs. In this contribution, we report on the fabrication of Bi@C microspheres using aerosol spray pyrolysis technique. When used as SIBs anode materials, the Bi@C microsphere delivered a high capacity of 123.5mAhg(-1) after 100 cycles at 100mAg(-1). The rate performance is also impressive (specific capacities of 299, 252, 192, 141, and 90mAhg(-1) are obtained under current densities of 0.1, 0.2, 0.5, 1, and 2Ag(-1), respectively). Furthermore, the Bi@C microsphere also proved to be suitable LIB anode materials. The excellent electrochemical performance for both SIBs and LIBs can attributed to the Bi@C microsphere structure with Bi nanoparticles uniformly dispersed in carbon spheres.