As one of the most widely studied conductive polymer

Polyaniline (PANI) has high conductivity and good redox property. But its conjugated delocalization structure make it difficult to dissolve in the organic solvent and the conductivity will become poor under neutral and alkaline environment

which restrict its application. Carbon nanotubes (CNTs) have been frequently applied with excellent electrical

thermal properties

optical properties and unique mechanical properties. The combination of CNTs and PANI will overcome the defects of PANI itself by utilizing the synergistic effect of the two

which effectively improves its capacity and cyclical stability. The preparation processes of polyaniline/carbon nanotube composites using chemical oxidation polymerization

electrochemical polymerization and etc were summarized. Applications of the composites in supercapacitor

electrochemical analysis

batteries

sensors and etc were introduced particularly. The future applications and development in PANI composites were outlooked according to the properties of PANI and CNTs.