Multifunctional Polypropylene Separator via Cooperative Modification and Its Application in the Lithium-Sulfur Battery.,Langmuir

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Multifunctional Polypropylene Separator via Cooperative Modification and Its Application in the Lithium-Sulfur Battery.
Langmuir ( IF 3.7 ) Pub Date : 2020-09-02 , DOI: 10.1021/acs.langmuir.0c02216
Liuli Zeng _{1,

2} , Zhijia Zhang ₁ , Weijian Qiu ₁ , Jiankun Wei ₁ , Zhihuang Fang ₁ , Qibo Deng ₃ , Wei Guo ₂ , Dan Liu ₁ , Zhizhong Xie ₁ , Deyu Qu ₁ , Haolin Tang ₂ , Junsheng Li _{1,

4} , Ning Hu ₃

Affiliation

The continuous shuttling of dissolved polysulfides between the electrodes is the primary cause for the rapid decay of lithium–sulfur batteries. Modulation of the separator–electrolyte interface through separator modification is a promising strategy to inhibit polysulfide shuttling. In this work, we develop a graphene oxide and ferrocene comodified polypropylene separator with multifunctionality at the separator–electrolyte interface. The graphene oxide on the functionalized separator could physically adsorb the polysulfide while the ferrocene component could effectively facilitate the conversion of the adsorbed polysulfide. Due to the combination of these beneficial functionalities, the separator exhibits an excellent battery performance, with a high reversible capacity of 409 mAh g^–1 after 500 cycles at 0.2 C. We anticipate that the combinatorial separator functionalization proposed herein is an effective approach for improving the performance of lithium–sulfur batteries.

中文翻译：

协同改性的多功能聚丙烯分离器及其在锂硫电池中的应用。

电极之间溶解多硫化物的不断穿梭是锂硫电池快速衰减的主要原因。通过隔板改性来调节隔板-电解质界面是抑制多硫化物穿梭的有前途的策略。在这项工作中，我们开发了一种在隔板-电解质界面具有多功能的氧化石墨烯和二茂铁共改性聚丙烯隔板。功能化隔板上的氧化石墨烯可以物理吸附多硫化物，而二茂铁组分可以有效地促进吸附的多硫化物的转化。由于这些有益功能的结合，隔板表现出出色的电池性能，可逆容量高达409 mAh g ^–1 在0.2 C下经过500次循环后。我们预计，本文提出的组合隔板功能化是一种改善锂硫电池性能的有效方法。

更新日期：2020-09-22

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