High-performance hybrid supercapacitor-immobilized Wells-Dawson polyoxometalates on activated carbon electrodes.

Autor: J E M; Materials and Catalysis Laboratory, Department of Chemistry, National Institute of Technology Karnataka Surathkal 575025 India malss@nitk.edu.in., Chandewar PR; Department of Chemical Engineering, Indian Institute of Technology Hyderabad Kandi Sangareddy 502284 Telangana India., Shee D; Department of Chemical Engineering, Indian Institute of Technology Hyderabad Kandi Sangareddy 502284 Telangana India., Mal SS; Materials and Catalysis Laboratory, Department of Chemistry, National Institute of Technology Karnataka Surathkal 575025 India malss@nitk.edu.in.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2023 Sep 06; Vol. 13 (38), pp. 26744-26754. Date of Electronic Publication: 2023 Sep 06 (Print Publication: 2023).
DOI: 10.1039/d3ra04478e
Abstrakt: The nanofabrication of electroactive hybrid materials for next-generation energy storage devices is becoming increasingly significant as supercapacitor (SC) technology develops rapidly. The present study utilizes activated carbon (AC) templates reinforced with Wells-Dawson polyoxotungstates (POMs) to produce nanohybrid electrodes for high-performance supercapacitors. This study analyzes Wells-Dawson polyoxotungstates (P 2 W 18 ) for the first time integrated with AC, and its structural and electrochemical performances are discussed. First, the electrochemical performances of symmetric supercapacitors were characterized in an acidic aqueous electrolyte (0.5 M H 2 SO 4 ). It was observed that a supercapacitor cell containing the 5 wt% AC-P 2 W 18 hybrid symmetric displayed a noteworthy specific capacitance of 289 F g -1 and a remarkable energy density of 40 W h kg -1 . Moreover, 5% AC-P 2 W 18 symmetric supercapacitor cells showed 89% cyclic stability over 4000 cycles. Three LED lights were charged onto the electrode. The LEDs continued to illuminate continuously for red until 160 seconds, yellow until 20 seconds, and blue until 10 seconds after removing the electrode from the electrochemical workstation, demonstrating the device's power and energy density.
Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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