首页|Valorization of lignin: Application of lignin-derived activated carbon in capacitors and investigation of its textural properties and electrochemical performance
Valorization of lignin: Application of lignin-derived activated carbon in capacitors and investigation of its textural properties and electrochemical performance
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NSTL
Elsevier
? 2021This work provides an idea for the efficient and harmless utilization of lignin and further evaluates the textural properties of lignin-derived activated carbon/specific capacitance relationship. The yield of apricot shell lignin (ASL) was 30.42%. H3PO4/KOH was used to assist the preparation of ASL-derived activated carbons (AACs) for capacitors. The AAC prepared at a ratio of H3PO4 weight to ASL weight of 3 (AAC-P-3) had a specific surface area of 1475.16 m2/g. Similarly, the AAC obtained at a ratio of KOH weight to ASL weight of 2 (AAC-K-2) owned a specific surface area of 2136.56 m2/g. At 0.50 A/g, the specific capacitance of AAC-P-3 and AAC-K-2 was 169.14 F/g and 236.00 F/g, respectively. The average value of the correlation coefficients (AR2) between specific surface area and specific capacitance was highest, i.e., 0.983, followed by the AR2 (0.978) between Vmicro/Vmeso and specific capacitance, the AR2 (0.975) between pore-wall thickness and specific capacitance. Consequently, when using a current density range of 0.50–10.00 A/g and a three-electrode configuration with a 6 M KOH electrolyte, the specific capacitance of AACs depends not only on the specific surface area but also on the Vmicro/Vmeso, pore-wall thickness, and Vmicro.
NSTL
Elsevier
