Magnetic biochar obtained through catalytic pyrolysis of macroalgae: A promising anode material for Li-ion batteries. (September 2019)

• Record Type: Journal Article
• Authors: Salimi, Pejman; Norouzi, Omid; Pourhoseini, S.E.M.; Bartocci, Pietro; Tavasoli, Ahmad; Di Maria, Francesco; Pirbazari, S.M.; Bidini, Gianni; Fantozzi, Francesco
• Is Part Of: Renewable energy. Volume 140(2019)
• Page Start: 704
• Page End: 714
• Publication Date: 2019-09
• Subjects: Pyrolysis -- Magnetic biochar -- Catalyst -- Furans -- Biochemicals -- Li-ion battery; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2019.03.077
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: In this work, Cladophora glomerata, a harmful seaweed, is converted into an olive-shaped magnetic biochar by a slow pyrolysis process catalyzed by iron. The resultant magnetic biochar has a high surface area of 296.4 m 2 g −1 with a carbon-rich structure that makes it suitable to be used as an electrode in Li-ion batteries. The catalytic pyrolysis process showed significant effect on steam reforming, ketonization and deoxygenation and/or denitrogenation reactions. The overall quality of the pyrolysis products increases: the gas contains a higher percentage of hydrogen (up to 22%), while the oil is enriched in furans (with a selectivity of about 14%). The electrochemistry behavior of magnetic biochar has been also evaluated, using galvanostatic charge–discharge, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) analyses. The electrochemical results indicated a higher initial specific discharge capacity (740 mAh g −1 ) and great cyclic stability for magnetic electrode as compared to the biochar electrode. Highlights: Magnetic material in renewable energy production and storage systems. The effect of magnetic catalyst on bio-products derived from cladophora glomerata. The effect of magnetic electrode on the electrochemical performance of Li-ion batteries. High thermal stability and easy recyclability of magnetic electrode. Hydrogen-rich gas and furan compounds in the presence of magnetic catalyst.