| 1 | Hierarchical flower-like cobalt phosphosulfide derived from Prussian blue analogue as an efficient polysulfides adsorbent for long-life lithium-sulfur batteries显示文摘Lithium-sulfur (Li-S) battery as one of the most attractive candidates for energy storage systems has attracted extensive interests.Herein,for the first time,hierarchical flower-like cobalt phosphosulfide architectures (defined as 'CoSP') derived from Prussian blue analogue (PBA) was fabricated through the conversion of Co-based PBA in PxSy atmosphere.The as-prepared polar CoSP could effectively trap polysulfides through the formation of strong chemical bonds.In addition,after the combination of CoSP with high conductive rGO,the obtained CoSP/rGO as sulfur host material exhibits ultralow capacity decay rate of 0.046% per cycle over 900 cycles at a current density of 1 C.The excellent performance could be attributed to the shortened lithium diffusion pathways,fastened electron transport ability during polysulfide conversion,and increased much more anchor active sites to polysulfides,which is expected to be a promising material for Li-S batteries.It is believed that the as-prepared CoSP/rGO architectures will shed light on the development of novel promising materials for Li-S batteries with high cycle stability. | Xiaoxia Chen Xuyang Ding Haliya Muheiyati Zhenyu Feng Liqiang Xu Weini Ge Yitai Qian | 2019 | Nano Research2019，12，5： | 2 |
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