PEDOT:PSS Dual-Function Film Initiated 1,3-Dioxolane Polymerization in Li/S Cells,ACS Applied Energy Materials

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PEDOT:PSS Dual-Function Film Initiated 1,3-Dioxolane Polymerization in Li/S Cells
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-03-26 00:00:00 , DOI: 10.1021/acsaem.0c00083
Qing Lan ₁ , Yanbo Yang _{2,

3} , Zhiping Song ₁ , Ning Liu ₁ , Jian Qin ₁ , Fang Men ₄ , Hui Zhan _{1,

5}

Affiliation

The lithium/sulfur batteries are of significant interest because of their potential use in next-generation energy storage. After years of efforts, the bottleneck in their application still remains to be the polysulfide dissolution and thus induced impact on the cathode itself, the electrolyte, and the Li anode. In this work, in situ 1,3-dioxolane (DOL) polymerization initiated by the poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS) co-polymer is proposed and further introduced into the Li/S cell by a piece of the dual-function PEDOT:PSS film. The synergistic effect of PSS and PEDOT is revealed and their roles are investigated. With the PEDOT:PSS film and single DOL solvent electrolyte, the quasi-solid-state electrolyte is in situ formed within the cell and in turn leads to a 840 mA h/g capacity after 100 cycles, accompanied with a constant efficiency of ∼99%. The work sheds more light on the in situ polymerization technique and provides a comprehensive approach for solving the issues of Li/S cells.

中文翻译：

PEDOT：PSS双功能膜在Li / S电池中引发1,3-二氧戊环聚合

锂/硫电池由于在下一代储能中的潜在用途而备受关注。经过多年的努力，多硫化物的溶解仍然是其应用的瓶颈，因此对阴极本身，电解质和锂阳极产生了影响。在这项工作中，提出了一种由聚（3,4-乙撑二氧噻吩）-聚（苯乙烯磺酸盐）（PEDOT：PSS）共聚物引发的原位1,3-二氧戊环（DOL）聚合反应，并将其进一步引入Li / S单元由一块双重功能的PEDOT：PSS胶片组成。揭示了PSS和PEDOT的协同作用，并研究了它们的作用。使用PEDOT：PSS膜和单一DOL溶剂电解质，在电池内原位形成准固态电解质，并在100次循环后产生840 mA h / g的容量，伴随着约99％的恒定效率。该工作为原位聚合技术提供了更多的思路，并为解决Li / S电池问题提供了一种全面的方法。

更新日期：2020-03-26

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