Investigation of polyaniline films doped with Fe3+ as the electrode material for electrochemical supercapacitors

Facile synthesis of polyaniline/NiCo2O4 nanocomposites with enhanced electrochemical properties for supercapacitors

“…2a (Fig. 2c) exhibited a broad and weak reflection in the range of 20-25°, which were the characteristic peak of amorphous PANI [34,35]. Moreover, both diffraction peaks of PANI and NiCo 2 O 4 were observed in Fig.…”

“…Figure 6a shows the typical charge-discharge curves of the PANI and PANI/NiCo 2 O 4 , which can be seen that the charge and the discharge profiles of the electrodes are slightly curved, exhibiting a pseudocapacitive characteristic, which is in good agreement with the results of CV curves. The specific capacitance (SC) values determined from the CP curves are calculated according to the following equation [35]:…”

“…H + and Ni 2+ co-doped PANI films were well demonstrated which has a larger specific capacitance of 658.3 F g −1 at 5 mA cm −2 [34]. Meanwhile, H + and Co 2+ co-doped PANI films has the super high specific capacitance of 736 F g −1 at 3 mA cm −2 in H 2 SO 4 electrolyte [35]. Thus, good capacitive performance demonstrates that PANI doped with NiCo 2 O 4 may have potential superiority for the development of supercapacitors.…”

“…NiCo 2 O 4 /MSBPC composites that were synthesized by Xiong et al [8] exhibited anomalously high specific capacitance of 1696 F g −1 at 1 A g −1 in a 2 M KOH solution, while the electrochemical properties of NiCo 2 O 4 -doped PANI in H 2 SO 4 solution is seldom been reported. Moreover, in our previous works [34,35], we have investigated that PANI with different doping levels of Ni 2+ and Co 2+ prepared by electrochemical polymerization in acid solution were with better electrochemical performance compared with pure PANI doped with H + . H + and Ni 2+ co-doped PANI films were well demonstrated which has a larger specific capacitance of 658.3 F g −1 at 5 mA cm −2 [34].…”

“…Moreover, in our previous works [34,35], we have investigated that PANI with different doping levels of Ni 2+ and Co 2+ prepared by electrochemical polymerization in acid solution were with better electrochemical performance compared with pure PANI doped with H + . H + and Ni 2+ co-doped PANI films were well demonstrated which has a larger specific capacitance of 658.3 F g −1 at 5 mA cm −2 [34]. Meanwhile, H + and Co 2+ co-doped PANI films has the super high specific capacitance of 736 F g −1 at 3 mA cm −2 in H 2 SO 4 electrolyte [35].…”