| Title | Hydroquinone-mediated, bio-renewable corn starch electrolyte assembled with corn leaf-derived activated carbon for a high-performance, sustainable supercapacitor |
|---|---|
| ID_Doc | 12900 |
| Authors | Thongsai, N; Jirawanichakun, N; Jorn-am, T; Supchocksoonthorn, P; Paoprasert, P |
| Title | Hydroquinone-mediated, bio-renewable corn starch electrolyte assembled with corn leaf-derived activated carbon for a high-performance, sustainable supercapacitor |
| Year | 2024 |
| Published | |
| Abstract | Herein, a high performance, bio-renewable supercapacitor was fabricated, comprising corn leaf -derived activated carbons (CLACs) as electrode materials and corn starch as a host polymer for gel electrolyte. The CLACs, prepared via hydrothermal treatment and followed by KOH activation, exhibited a surface area of 998 cm2 g-1 mainly with a microporous structure. For the first time, the gel electrolyte was fabricated using corn starch as a natural host polymer in the presence of H3PO4 as an ion source and hydroquinone (HQ) as a redox additive. The corn starch -based gel electrolyte with 0.0165 M HQ and 10 %v/v H3PO4 showed the highest specific capacitance of 401 F g-1 at a scan rate of 10 mV s-1 with an excellent cyclic stability of 87 % after 10,000 charge -discharge cycles. The fabricated supercapacitors also demonstrated high capacitance retention under various environmental temperatures. Based on electrochemical analysis, the contribution from the diffusion -controlled process increased from 63 % to 73 % when using the HQ -integrated corn starch electrolyte. This work not only illustrates a potential strategy to utilize natural, sustainable materials for energy storage applications, but also proposes an effective way to improve the electrochemical performance of the natural -based polymer electrolyte for future quasi -solid-state supercapacitors. |
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