Ultrathin Nanosheet Assembled Sn_0.91Co_0.19S₂Nanocages with Exposed (100) Facets for High-Performance Lithium-Ion Batteries

Bing Li, Peng Gu, Guangxun Zhang, Yao Lu, Kesheng Huang, Huaiguo Xue, Huan Pang

School of Chemistry and Chemical Engineering, Yangzhou University

Abstract:Ultrathin 2D inorganic nanomaterials are good candidates for lithium-ion batteries, as well as the micro/nanocage structures with unique and tunable morphologies. Meanwhile, as a cost-effective method, chemical doping plays a vital role in manipulating physical and chemical properties of metal oxides and sulfides. Thus, the design of ultrathin, hollow, and chemical doped metal sulfides shows great promise for the application of Li-ion batteries by shortening the diffusion pathway of Li ions as well as minimizing the electrode volume change. Herein, ultrathin nanosheet assembledSn_0.91Co_0.19S₂nanocages with exposed (100) facets are first synthesized. The as-prepared electrode delivers an excellent discharge capacity of 809 mA h g⁻¹at a current density of 100 mA g⁻¹with a 91% retention after 60 discharge–charge cycles. The electrochemical performance reveals that the Li-ion batteries prepared bySn_0.91Co_0.19S₂nanocages have high capacity and great cycling stability.

Small,2018, 14,1702184.IF = 8.643

文章链接：http://onlinelibrary.wiley.com/doi/10.1002/smll.201702184/full