Biochar for Supercapacitor Application: A Comparative Study. Issue 24 (11th November 2022)

• Record Type: Journal Article
• Authors: Rawat, Shivam; Boobalan, Thangavel; Krishna, Bhavya B.; Sathish, Marappan; Hotha, Srinivas; Bhaskar, Thallada
• Is Part Of: Chemistry, an Asian journal. Volume 17:Issue 24(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-11
• Subjects: Biochar -- Biomass -- Charge storage -- Energy storage -- Supercapacitor; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.202200982
• Languages: English
• ISSNs: 1861-4728

Abstract

Abstract: Biochar is a carbon‐rich solid that can be prepared through heat treatment of biomass under an inert atmosphere. In the present work, biochar prepared from different feedstocks, namely, Litchi chinensis (Litchi) seeds, Syzygium cumini (Jamun) seeds, and pine cone, were evaluated for charge storage in the form of supercapacitors. The physicochemical and electrochemical properties of the biochar were highly dependent on the preparation temperature and the choice of feedstock. Among the three feedstocks, Litchi seed‐derived biochar showed the highest specific capacitance of 190 F g −1 at 1 A g −1 in a symmetric cell configuration. N and O heteroatom functionalities in the Litchi seed‐derived biochar, higher specific surface area, and pore volume for electrolyte adsorption were responsible for its superior capacitive performance as compared to Jamun seeds and pine cone biochar. Abstract : Biochar is a renewable, carbon‐rich material with various heteroatom functionalities and has potential application in supercapacitor. Its properties are found to be dependent on feedstock and carbonization temperature. Among Jamun seeds, Litchi seeds, and pine cones, available as food or beverage industry waste and forest residues, Litchi seed‐derived biochar displayed superior charge storage performance.