Preparation and Electrochemical Energy Storage Performances of Carbon Nanotube Network/Polyaniline Composite

Using the carbon nanotube( CNT) powder and carbon nanotube network( CNTN) as the template, CNT/polyaniline( PANI) and CNTN/PANI composites were prepared via a PANI finite field polymerization method. The morphologies of the obtained samples were characterized by transmission electron microscope and scanning electron microscope. Nitrogen adsorption-desorption analysis was used to study the composites' pore structure data, and the four-probe conductivity meter was also used to study the samples' electric conductivity. The electrochemical energy storage performance of the obtained materials was characterized the cyclic voltammograms, galvanostatic charging/discharging curves, cycle life testing and electrochemical impedance spectroscopy. The results show that the obtained CNTN/PANI composite has higher electrochemical capacitance of 143. 2 F/g( in organic electrolyte) and better electrical conductivity than the CNT/PANI, indicating that CNTN is more suitable to prepare composite with polymer than CNT powder since the CNTN has outstanding electrical conductivity, mechanical property and electrochemical energy storage property.