文章基本信息

标题：Engineering Bi₂O₃-Bi₂S₃ heterostructure for superior lithium storage
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作者：Tingting Liu ; Yang Zhao ; Lijun Gao 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep09307
出版社：Springer Nature
摘要：Bismuth oxide may be a promising battery material due to the high gravimetric (690 mAh g⁻¹) and volumetric capacities (6280 mAh cm⁻³). However, this intrinsic merit has been compromised by insufficient Li-storage performance due to poor conductivity and structural integrity. Herein, we engineer a heterostructure composed of bismuth oxide (Bi₂O₃) and bismuth sulphide (Bi₂S₃) through sulfurization of Bi₂O₃ nanosheets. Such a hierarchical Bi₂O₃-Bi₂S₃ nanostructure can be employed as efficient electrode material for Li storage, due to the high surface areas, rich porosity, and unique heterogeneous phase. The electrochemical results show that the heterostructure exhibits a high Coulombic efficiency (83.7%), stable capacity delivery (433 mAh g⁻¹ after 100 cycles at 600 mA g⁻¹) and remarkable rate capability (295 mAh g⁻¹ at 6 A g⁻¹), notably outperforming reported bismuth based materials. Such superb performance indicates that constructing heterostructure could be a promising strategy towards high-performance electrodes for rechargeable batteries.