关键词: 锂离子电池, 聚合物, 正极材料

Abstract: In recent years, the lithium polymeric cathode materials with high energy storage capability are hot research topics in the field of new electrochemical energy. In this paper, we introduced the structure, preparation，conductive mechanism and electrochemical properties of the radical polymers, conducting polymers, polysulfides and carbon-sulfur skeleton cross-linked polymers. This review focused on the characteristics of nitrogen-oxygen structure and high charging/discharging efficiency for radical polymers, as well as the synthesis methods and doping mechanisms for conducting polymers. Besides, the excellent storage capability of—(S—S)n— bond for polysulfides and carbon-sulfur skeleton cross-linked polymers was emphasized, that could result in an ultra high specific capacity for lithium batteries. Finally we pointed out that the tackling of capacity attenuation and degradability of polymeric cathode materials to ensure the cycling stability and optimization of synthesis and preparation processes shall be the focuses of future research work.

Key words: lithium ion battery, polymer, cathode material