Journal
NANOMATERIALS
Volume 8, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/nano8040214
Keywords
supercapacitor; self-doped polyaniline; carbon-nanoparticle film; electropolymerization; cyclic voltammetry
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Funding
- Ministry of Science and Technology in Taiwan [MOST 106-2221-E-390-025, MOST 106-2622-E-390-001-CC2]
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In this work, we electrochemically deposited self-doped polyanilines (SPANI) on the surface of carbon-nanoparticle (CNP) film, enhancing the superficial faradic reactions in supercapacitors and thus improving their performance. SPANI was electrodeposited on the CNP-film employing electropolymerization of aniline (AN) and o-aminobenzene sulfonic acid (SAN) comonomers in solution. Here, SAN acts in dual roles of a self-doped monomer while it also provides an acidic environment which is suitable for electropolymerization. The performance of SPANI CNP-based supercapacitors significantly depends upon the mole ratio of AN/SAN. Supercapacitor performance was investigated by using cyclic voltammetry (CV), galvanostatic charge and discharge (GCD), and electrochemical impedance spectroscopy (EIS). The optimal performance of SPANI-CNP-based supercapacitor exists at AN/SAN ratio of 1.0, having the specific capacitance of 273.3 Fg(-1) at the charging current density of 0.5 Ag-1.
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