Journal
POLYMERS
Volume 11, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/polym11081315
Keywords
polyaniline; graphene oxide; composite; co-doped; solid-state symmetric ultracapacitor; specific capacitance
Categories
Funding
- Higher Education Commission Pakistan [20-1647, 20-111/NRPU/RD/HEC]
- German Research Foundation
- Open Access Publication Funds of the Technische Universitat Braunschweig
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An eco-friendly solid-state symmetric ultracapacitor (Uc) device was fabricated using a polyaniline graphene oxide composite co-doped with sulfuric acid (H2SO4) and dodecyl benzene sulfonic acid (DBSA) or camphor sulfonic acid (CSA), as electrode material utilizing gold sheets as current collectors. The device showed specific capacitance value of 150 F/g at 1 A/g current density, with a capacitance retention value of 93.33% at higher current density (10 A/g), indicating a high rate capability. An energy density of 15.30 Whkg(-1) with a power density of 1716 Wkg(-1) was obtained at the current density of 1 A/g. The values of areal capacitance, power density, and energy density, achieved at the current density of 5 mAcm(-2), were 97.38 mFcm(-2), 9.93 mWhcm(-2), and 1.1 Wcm(-2), respectively. Additionally, the device showed very low solution and charge transfer resistance (0.885 Omega and 0.475 Omega, respectively). A device was also fabricated utilizing copper as current collector; however, a lower value of specific capacitance (82 F/g) was observed in this case.
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