Polyaniline-cobalt hydroxide hybrid nanostructures and their supercapacitor studies

TY - JOUR

T1 - Polyaniline-cobalt hydroxide hybrid nanostructures and their supercapacitor studies

AU - Shendkar, Janardhan H.

AU - Zate, Manohar

AU - Tehare, Kailas

AU - Jadhav, Vijaykumar V.

AU - Mane, Rajaram S.

AU - Naushad, Mu

AU - Yun, Je Moon

AU - Kim, Kwang Ho

N1 - Publisher Copyright: © 2016 Elsevier B.V.

PY - 2016/9/1

Y1 - 2016/9/1

N2 - We attempt to demonstrate comprehensive analysis of experimentally obtained adverse supercapacitive performance of cobalt hydroxide (Co(OH)2)-polyaniline (PANI) hybrid nanocomposites (HNs), prepared potentiostatically via electrochemical deposition method, compared to phase pure individual nanostructures. Morphologically amorphous Co(OH)2, PANI and HNs are entirely different from one another. The electrochemical properties of the Co(OH)2, PANI and HNs electrodes have been investigated by cyclic voltammograms, galvanostatic charge-discharge and electrochemical impedance spectroscopy measurements. The specific capacitances of PANI, HNs and Co(OH)2 are found to be 3.06F/g, 215F/g and 868F/g, respectively, at a sweep rate of 10 mV/s in 1.0 M NaOH electrolyte, whereas the stabilities and voltammetric charges, assigned to these electrodes, are 47%, 60% & 55% (after 1000 cycles) and 17.22 mC/cm2, 836.39 mC/cm2 and 1128.73 mC/cm2, respectively. Obtained adverse (inferior) supercapacitive performance values of HNs electrodes have been demonstrated on occurrence of inner and outer charges concept. Our work demonstrates plausible causes for observed smaller supercapacitor performance in hybrid/composite nanostructured electrodes (not a common practice) and useful to researchers working in composite/hybrid symmetric and asymmetric supercapacitor fields.

AB - We attempt to demonstrate comprehensive analysis of experimentally obtained adverse supercapacitive performance of cobalt hydroxide (Co(OH)2)-polyaniline (PANI) hybrid nanocomposites (HNs), prepared potentiostatically via electrochemical deposition method, compared to phase pure individual nanostructures. Morphologically amorphous Co(OH)2, PANI and HNs are entirely different from one another. The electrochemical properties of the Co(OH)2, PANI and HNs electrodes have been investigated by cyclic voltammograms, galvanostatic charge-discharge and electrochemical impedance spectroscopy measurements. The specific capacitances of PANI, HNs and Co(OH)2 are found to be 3.06F/g, 215F/g and 868F/g, respectively, at a sweep rate of 10 mV/s in 1.0 M NaOH electrolyte, whereas the stabilities and voltammetric charges, assigned to these electrodes, are 47%, 60% & 55% (after 1000 cycles) and 17.22 mC/cm2, 836.39 mC/cm2 and 1128.73 mC/cm2, respectively. Obtained adverse (inferior) supercapacitive performance values of HNs electrodes have been demonstrated on occurrence of inner and outer charges concept. Our work demonstrates plausible causes for observed smaller supercapacitor performance in hybrid/composite nanostructured electrodes (not a common practice) and useful to researchers working in composite/hybrid symmetric and asymmetric supercapacitor fields.

KW - Electrochemical deposition

KW - Electrochemical supercapacitor

KW - Nanofibers

KW - Nanoplatelets

KW - Polyaniline

UR - http://www.scopus.com/inward/record.url?scp=84971668226&partnerID=8YFLogxK

U2 - 10.1016/j.matchemphys.2016.05.070

DO - 10.1016/j.matchemphys.2016.05.070

M3 - 文章

AN - SCOPUS:84971668226

SN - 0254-0584

VL - 180

SP - 226

EP - 236

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

ER -