A large area, flexible polyaniline/buckypaper composite with a core–shell structure for efficient supercapacitors

We fabricated efficient polyaniline (PANI)/buckypaper supercapacitors based on the continuous growth of flexible carbon nanotube (CNT) films and electro-deposition technique. The PANI/buckypaper electrodes have a core-shell structure which reduces the internal resistance and enhances charge transfer between PANI and CNTs. The performance of supercapacitors depends on the content and morphology of PANI. The PANI/buckypaper supercapacitors show a high specific capacitance of similar to 430 F g(-1) with a high energy density of similar to 140 W h kg(-1) and high power density of similar to 200 kW kg(-1) when the PANI content is about 70 wt%.