Molten salt assisted conversion of corn lignocellulosic waste into carbon nanostructures with enhanced Li-ion storage performance. (16th January 2023)

• Record Type: Journal Article
• Authors: Li, Ruiping; Kamali, Ali Reza
• Is Part Of: Chemical engineering science. Volume 265(2023)
• Publication Date: 2023-01-16
• Subjects: Biomass -- Carbon -- Molten salt -- Li-ion storage -- Morphology -- Valorization; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; Chemical engineering; Periodicals; Electronic journals; 660
• DOI: 10.1016/j.ces.2022.118222
• Languages: English
• ISSNs: 0009-2509

Abstract

Highlights: Green preparation of corn derived biocarbons for Li-ion storage application. Physical and electrochemical properties of biomass-derived carbon materials. Influence of molten salts on enhancing the electrochemical performance of biocarbons. Abstract: Corn-derived biocarbon (CDB) is prepared by the carbonization of corn lignocellulosic waste at 500 °C in air atmosphere, without (CDB-1) and with (CDB-2) the presence of eutectic LiCl-KCl molten salt. CDB-2 is found to be superior to CDB-1 in terms of specific surface area, pore volume and elemental carbon purity. The enhanced porosity, and the partial dissolution of the biomass impurities into the molten salt contribute to the greater Li-ion storage performance of CDB-2 in comparison to that of CDB-1; 302.8 vs 216.3 mAh/g after 200 discharge/charge cycles at the current density of 200 mA/g. After 625 cycles, the capacity of CDB-2 is evaluated to be remarkable at 380.0 mAh/g, considerably greater than that of commercial graphite anodes. The results obtained show the highly positive influence of molten salts on enhancing the physical and electrochemical properties of the biomass-derived carbon materials.