Renewable spent mushroom compost-derived carbon for solid-state supercapacitors as a sustainable alternative. (30th March 2022)

• Record Type: Journal Article
• Authors: Dhanasekaran, P.; Kumar, Deivasigamani Ranjith; Shim, Jae-Jin; Kalpana, D.
• Is Part Of: New journal of chemistry. Volume 46:Number 16(2022)
• Page Start: 7433
• Page End: 7441
• Publication Date: 2022-03-30
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj00554a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : The systematic and stepwise formation of spent mushroom compost-derived activated carbon (SMC), electrode assembly, and supercapacitor performance were studied. Abstract : The preparation of an environmentally benign, inexpensive supercapacitor electrode material from waste biomass, achieving useful carbon electrode production, is challenging. The present work aims to find a process for recycling spent mushroom compost into a useful supercapacitor electrode material. High-surface-area activated carbon derived from spent mushroom compost (SMC) is used as a catalyst electrode in a solid-state electrochemical double-layer capacitor (SSEDLC). The SMC is thermally activated at three different temperatures (SMC-700, SMC-800, and SMC-900) to achieve the optimal carbon content and activation temperature for improving electrode performance based on the surface area and pore structure. The SMC-derived nanostructured carbon exhibited a high specific surface area of 690 m 2 g −1 in the case of SMC-800 upon activation, which strongly influences the specific and areal capacitance of the fabricated SSEDLC. Interestingly, the use of the prepared PVA/H2 SO4 gel electrolyte showed a promising trend, with considerable capacitance retention of up to 90% over 3000 cycles obtained with the material optimized at 800 °C (SMC-800).