Well-Defined Hierarchically Porous Double-Shell Hollow Polypyrrole@Sulfur Microspheres with Outer Sulfur Shells for Lithium–Sulfur Batteries with Superior Electrochemical Performance,Energy & Fuels

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Well-Defined Hierarchically Porous Double-Shell Hollow Polypyrrole@Sulfur Microspheres with Outer Sulfur Shells for Lithium–Sulfur Batteries with Superior Electrochemical Performance
Energy & Fuels ( IF 5.2 ) Pub Date : 2020-05-18 , DOI: 10.1021/acs.energyfuels.0c01163
Wenli Wei ₁ , Jinmei Li ₁ , Dong Liu ₁ , Changou Pan ₁ , Peng Liu ₁

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Polypyrrole (PPy) hollow micro/nanospheres have been widely designed to encapsulate active sulfur as cathodes in lithium–sulfur (Li–S) batteries to inhibit the polysulfide shuttle effect. Here, for the first time, well-defined hierarchically porous double-shell hollow polypyrrole@sulfur (h-PPy@S) microspheres were fabricated as sulfur cathodes for high-performance Li–S batteries, with sulfonated polystyrene (PSS) microspheres as sacrificial templates. With an optimized outer sulfur shell, the hierarchically porous h-PPy@S cathode possessed superior electrochemical performance, in comparison with the reported S@PPy cathodes with outer PPy shells, especially the cycling stability. The superior electrochemical performance should have resulted from the unique hierarchically porous double-shell hollow nanostructure with an inner PPy shell and a thinner uniform outer S shell.

中文翻译：

具有优异电化学性能的，定义良好的分层多孔双壳空心聚吡咯@硫微球和外硫壳，用于锂硫电池

聚吡咯（PPy）中空微球/纳米球已被广泛设计为将活性硫封装为锂-硫（Li-S）电池的阴极，以抑制多硫化物的穿梭效应。在这里，首次将定义明确的分层多孔双壳空心聚吡咯@硫（h-PPy @ S）微球用作高性能Li–S电池的硫阴极，并使用磺化聚苯乙烯（PSS）微球作为牺牲品模板。通过优化的硫外壳，分层多孔h-PPy @ S阴极具有优异的电化学性能，这与已报道的具有PPy外壳的S @ PPy阴极相比，尤其是循环稳定性。

更新日期：2020-05-18

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