Vigilancia Tecnológica

Schematic illustration of the preparation process of three?type PANIs and their assembly of PANI?S//AC3:1 asymmetric supercapacitor device.AbstractIn this article, conductive polyaniline (PANI) was prepared by electrochemical polymerization on the FTO surface doping different protonic acids (H2SO4, HCl and H3PO4), named the rod?like PANI?S, dogtail?like PANI?Cl and burr?like PANI?P, respectively. The three?type PANIs possess stable structure, novel morphology and low charge transfer resistance after careful investigation. Among them, the obtained rod?like PANI?S has the best specific capacitance of 542.8?F?g?1. Also, biomass activated carbon AC with good specific capacitance was successfully prepared by chemical activation of green tea. Interestingly, the asymmetric supercapacitor (ASC) device was assembled with PANI?S in PVA?H2SO4 as the positive electrode and AC3:1 in PVA?KOH as the negative electrode and the obtained ASC device has voltage window of 1.6?V and energy density of 29?Wh?kg?1. Electrochemical evaluation in the PANI?based ASC devices improves the potential applications in energy storage fields.