Bifunctional Separator Coated with Hexachlorocyclotriphosphazene/Reduced Graphene Oxide for Enhanced Performance of Lithium–Sulfur Batteries,Chemistry - A European Journal

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Bifunctional Separator Coated with Hexachlorocyclotriphosphazene/Reduced Graphene Oxide for Enhanced Performance of Lithium–Sulfur Batteries
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-08-17 , DOI: 10.1002/chem.201802386
Yanping Zheng _{1,

2} , Honghong Fan ₁ , Huanhuan Li ₃ , Chaoying Fan ₁ , Haiyan Yuan ₁ , Zhifang Yang ₁ , Kecheng Huang ₁ , Wenliang Li ₁ , Jingping Zhang ₁

Affiliation

Although extensive research has been performed in the field of Li−S rechargeable batteries, commercial applications are still hindered by the dissolution of the reaction intermediates of lithium polysulfides (LiPSs). Through the combination of experimental and theoretical results, a bifunctional separator has been designed by coating hexachlorocyclotriphosphazene (HCCP)‐decorated reduced graphene oxide (rGO), which provides effective anchor sites for immobilizing the LiPSs. LiPSs can be adsorbed on the HCCP/rGO surface with moderate binding strength, and their structures and the electrical conductivity of HCCP/rGO are well maintained. The synergetic effect of the effective barrier and good electrical conductivity within the HCCP/rGO sheets efficiently anchors LiPSs and achieves enhanced electrochemical performance. More importantly, different substituents can be used to tune the immobilization of LiPSs by HCCP derivatives. Therefore, it is expected that HCCP and its derivatives can be utilized as a promising anchoring material for high‐performance Li−S batteries.

中文翻译：

六氯环三磷腈/氧化石墨烯涂层的双功能隔板，可提高锂硫电池的性能

尽管已经在Li-S可再充电电池领域进行了广泛的研究，但是由于多硫化锂（LiPSs）的反应中间体的溶解，商业应用仍然受到阻碍。通过实验和理论结果的结合，通过涂覆六氯环三磷腈（HCCP）装饰的还原型氧化石墨烯（rGO）设计了一种双功能隔板，该隔板提供了固定LiPS的有效锚点。LiPS可以以中等的结合强度吸附在HCCP / rGO的表面上，并且可以很好地保持其结构和HCCP / rGO的电导率。HCCP / rGO片材内有效屏障和良好电导率的协同作用可有效锚固LiPS，并实现增强的电化学性能。更重要的是，不同的取代基可用于调节HCCP衍生物对LiPS的固定。因此，人们期望HCCP及其衍生物可以用作高性能Li-S电池的有前途的锚固材料。

更新日期：2018-08-17

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