Lithium sulfur batteries (LSBs) are regarded as promising electrochemical energy storage devices owing to their higher theoretical capacity than commercial cathode materials. Herein, we report a simple method for preparing a modified sulfur/Ketjenblack (S/KB) cathode using polymer composite poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS), which displays ionic and electron conductivity and can suppress polysulfide dissolution during the charge-discharge process. The S/KB + PEDOT:PSS cathode displayed higher electrochemical performance than the S/KB cathode. The effectiveness of suppressing polysulfide dissolution was determined visually and by UV–visible spectroscopy. The findings demonstrate the multi-functionality of PEDOT:PSS as an efficient electron conductive additive for S/KB cathode in high-performance LSBs.

锂硫电池（LSB）由于其理论容量比市售正极材料高，因此被认为是有前途的电化学储能设备。本文中，我们报告了一种使用聚合物复合聚（3,4-乙撑二氧噻吩）-聚（苯乙烯磺酸盐）（PEDOT：PSS）制备改性硫/科琴黑（S / KB）阴极的简单方法，该方法可显示离子和电子导电性，并且可以抑制充放电过程中多硫化物的溶解。S / KB + PEDOT：PSS阴极显示出比S / KB阴极更高的电化学性能。视觉上和通过紫外可见光谱法测定抑制多硫化物溶解的有效性。这些发现证明了PEDOT：PSS的多功能性，它是高性能LSB中S / KB阴极的有效电子导电添加剂。