The Initial Study of Polyaniline with Manganese Oxides for Electrochemical Capacitors

Conducting polymers have been found to be promising as electrode material in energy storage devices such as electrochemical capacitors due to they have good capacitance and relatively high charge/discharge rates, giving rise to higher energy and power density than carbon-based electrochemical capacitors. Furthermore, they have good chemical stability, high conductivity and are easy to manufacture. The excellent performance of conducting polymers is due to their pseudocapacitive charge storage mechanism. Polyaniline (PANI) is one of candidate of conducting polymer has been used as material in this field; however, there are some drawbacks to using conducting polymers as the electroactive material. Therefore, conducting polymers require presence of another material which has good mechanical and electrochemical behavior to address those problems. Manganese oxides have good electrochemical performance by themselves, and are therefore an excellent candidate for forming a composite with conducting polymers. Desirable characteristics of manganese oxides include that they are abundant, low cost, and have high specific capacitance. An initial study of the electrodeposition behavior of polyaniline-manganese oxides thin film was investigated using linear sweep voltammetry (LSV), chronoamperometry (CA), and cyclic voltammetry (CV). Based on the result of experiments, Mn-modified PANI thin films have been shown to be promising materials for electrochemical capacitors electrodes.