With the rapid development of energy storage power supply and electric cars, development of high energy density for lithium ion battery becomes focus of the future study. The performance of lithium ion battery greatly depends on the cathode materials. At present, there are some defects in widely used inorganic cathode materials such as limited capacity upgrade space, large energy consumption for production process, existence of security risks, etc. Therefore, it is necessary to develop green energy materials with higher specific capacity, better safety performance and abundant reserves in nature. Compared with inorganic cathode materials, organic cathode material is a kind of energy storage material with broad application prospects due to the advantages of high theoretical capacity, abundant resources, environmental friendness, structure design easily and system security. This paper summarizes the researches which have been carried out at home and abroad recent years. Several main kinds of organic cathode materials including conductive polymer, sulfur compounds, nitrogen oxygen free radical compounds and containing oxygen conjugated compounds are introduced. The electrochemical properties, electrochemical reaction mechanism, advantages and disadvantages of these compounds are compared and analyzed. Through the analysis and prospects for the future, the problems need to be solved for cathode materials of lithium ion battery are pointed out, and the future direction for research and improvement of organic cathode materials is proposed.

Contents
1 Introduction
2 Organic conductive polymer cathode materials
3 Organic sulfide cathode materials
4 Organic containing oxygen cathode materials
5 Conclusion and prospect