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12-03-2019 | Issue 8/2019

Journal of Materials Science: Materials in Electronics 8/2019

Camphor sulfonic acid assisted synthesis of polythiophene composite for high energy density all-solid-state symmetric supercapacitor

Journal:
Journal of Materials Science: Materials in Electronics > Issue 8/2019
Authors:
H. Vijeth, S. P. Ashokkumar, L. Yesappa, M. Niranjana, M. Vandana, H. Devendrappa
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Abstract

Here, we report a high energy density all-solid-state symmetric supercapacitor (SSC) based on polythiophene/Al2O3 (PTCA) composite synthesized via camphor sulfonic acid assisted chemical polymerization of thiophene. An electrochemical study showed that polythiophene/50%Al2O3 (PTCA5) composite electrode exhibits the highest gravimetric specific capacitance of 780.40 Fg−1 at 0.5 Ag−1 in three electrode system. Subsequently, the all-solid-state symmetric supercapacitor (SSC) fabricated using PTCA5 electrode achieved a specific capacitance of 472.8 Fg−1 at 1 Ag−1 using PVA-KOH gel as an electrolyte. Moreover, SSC showed excellent cyclic performance with 90.54% capacitance retention of its initial capacitance even after 5000 cycles. Additionally, a superior specific energy density of 58.04 Whkg−1 was obtained at a specific power density of 533.02 Wkg−1 for the same. This high potential and high energy density device find its application in the low-cost energy storage devices. Encouragingly, the fabricated SSC is utilized to light a commercial red LED effectively to validate the real usage.

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