二次锂电池聚合物正极材料研究进展

Research Progress in Polymer Cathode Materials for Rechargeable Lithium Battery

近几十年,二次锂电池作为重要的储能装置得到迅猛发展,而开发高性能的锂电池电极材料一直是电化学能源领域的研究热点之一。与传统无机正极材料相比,聚合物正极材料具有比容量高、柔软性好、廉价易得、环境友好、加工方便、可设计性强等诸多优点。本文综述了导电聚合物、共轭羰基聚合物以及含硫聚合物正极材料的结构特点、电极反应机理、电化学性能和近五年来的重大研究进展,总结了这三类聚合物电极材料的优缺点,并重点介绍了含硫聚合物电极材料中存在的问题及改进手段,最后提出了综合这三类聚合物优点的含硫共轭导电聚合物将会是该领域的研究方向。

In recent decades, rechargeable lithium battery has experienced the rapid development as one kind of energy storage device, and the exploitation of high-performance cathode materials has been one of the hotspots of electrochemical energy field. Compared with conventional inorganic cathode materials, polymer cathode materials are promising candidates for high energy density, flexible, cost-effective, environmentally friendly, and functional rechargeable lithium batteries. This review presents a brief overview of structural features, research advancement over the past five years on polymer conductive mechanism, electrochemical properties and major cathode materials, mainly including conducting polymers, conjugated carbonyl polymers and organosulfur polymers. Herein advantages and challenges of three kinds of polymer electrode materials are summarized. Besides, challenges and modified methods of organosulfur polymers were emphasized. Finally we pointed out that sulfur conjugated conducting polymers with comprehensive features shall be the focuses of future research work.