导电高分子材料在锂硫电池中的应用研究进展

Progress in Application of Conductive Polymers in Lithium-Sulfur Batteries

介绍了导电高分子材料包括聚苯胺、聚吡咯、聚噻吩在锂硫电池构件中的应用。回顾了三种材料作为锂硫电池正极中的包覆层、硫载体、含硫聚合物、集流体和粘结剂以及隔膜改性剂和功能隔层的研究进展。分析表明,经过导电高分子包覆的硫颗粒或碳/硫复合材料具有更优异的倍率性能和循环稳定性;相比于聚苯胺或聚吡咯,商业化的聚噻吩水溶液在制备包覆层上具有工艺优越性。提出了锂硫电池中导电高分子材料的研发方向,即基于物理和化学固硫机理设计导电高分子包覆层、开发导电高分子材料的可控合成技术以及探索导电高分子材料的特殊固硫机理,以期为高性能锂硫电池中导电高分子的选材和设计提供思路。

The applications of conductive polymers including polyaniline,polypyrrole and polythiophene in lithium-sulfur battery components were introduced.The research progress of three materials as coating layer,sulfur host,sulfur-containing polymer,collector and binder,separator modifier and functional interlayer in lithium-sulfur battery were reviewed.The results show that the conductive polymers coated on the sulfur particles or carbon/sulfur composites have superior rate capability and cycling stability;compared with polyaniline or polypyrrole,commercial polythiophene aqueous solution has more advantages in the preparation of coating layer.The research and development directions of conductive polymer materials in lithium-sulfur battery were put forward,which include designing conductive polymer coating based on physical and chemical sulfur confinement mechanism,developing controllable synthesis techniques of conductive polymer and exploring special sulfur-confinement mechanism of conductive polymers.The purpose is to provide novel ideas for the selection and design of conductive polymers for high performance lithium-sulfur batteries.