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题名: Propelling polysulfides transformation for high-rate and long-life lithiumsulfur batteries
作者: Zheng, Cheng;  Niu, Shuzhang;  Lv, Wei;  Zhou, Guangmin;  Li, Jia;  Fan, Shaoxun;  Deng, Yaqian;  Pan, Zhengze;  Li, Baohua;  Kang, Feiyu;  Yang, Quan-Hong
发表日期: 2017-3-1
摘要: A three-dimensional (3D) hierarchical porous graphene macrostructure coupled with uniformly distributed alpha-Fe2O3 nano-particles (denoted Fe-PGM) was designed as a sulfur host in a lithium- sulfur battery, and was prepared by a hydrothermal method. In this hybrid structure, the alpha-Fe2O3 nano-particles are proved to not only strongly interact with the polysulfides, but more importantly, chemically promote their transformation to insoluble species during the charge/discharge process, working as chemical barriers for the shuttling of the lithium polysulfides (LiPSs). Therefore, together with 3D hierarchical porous structure facilitating fast electron/ion transfer, Fe-PGM as a sulfur host in a cathode contributes to a high rate performance (565 mAh g(-1) at a high rate of 5 C relative to 1571 mAh g(-1) at 0.3 C) as well as long cyclic stability (an ultralow capacity fading rate of 0.049% per cycle over 1000 cycles at the high current rate of 5 C).
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Recommended Citation:
Zheng, Cheng,Niu, Shuzhang,Lv, Wei,et al. Propelling Polysulfides Transformation For High-rate And Long-life Lithiumsulfur Batteries[J]. Nano Energy,2017,33:306-312.

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