Supercapacitor performance of corn stover-derived biocarbon produced from the solid co-products of a hydrothermal liquefaction process. (February 2021)

• Record Type: Journal Article
• Authors: Shell, Katelyn M.; Rodene, Dylan D.; Amar, Vinod; Thakkar, Anuj; Maddipudi, Bharathkiran; Kumar, Sandeep; Shende, Rajesh; Gupta, Ram B.
• Is Part Of: Bioresource technology reports. Volume 13(2021)
• Publication Date: 2021-02
• Subjects: Integrated Biorefinery -- Hydrothermal Liquefaction -- Supercapacitors -- Energy Storage -- Biochar -- Biocarbon; Biomass energy -- Periodicals; Biotransformation (Metabolism) -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Waste products as fuel -- Periodicals; Waste products as fuel; Organic wastes; Factory and trade waste; Biotransformation (Metabolism); Biomass energy; Agricultural wastes; Periodicals; Electronic journals; 662.88
• DOI: 10.1016/j.biteb.2021.100625
• Languages: English
• ISSNs: 2589-014X

Abstract

Abstract: Biocarbon is obtained by the graphitization of biochar, a co-product in a novel integrated biorefinery concept that simultaneously produces C1–C3 acids, phenol, bio-oil, and biochar. The unhydrolyzed solids from the IBR are hydrothermally liquefied to obtain bio-oil and biochar coproducts. The biochar samples obtained from the HTL of UHS at different process conditions were low temperature thermally treated to remove volatile compounds, followed by a facile high temperature graphitization to biocarbon. Physical analyses showed the degree of graphitization directly effects pore volume. The UHS-SDC9 biochar produced at 275 °C, 40 psig, and 1 h of hydrothermal treatment exhibited the biocarbon with the best electrochemical performance having specific capacitance of 242 F g −1 at a scan rate of 5 mV s −1 and an energy density of 9.9 W h kg −1 . Statistical analysis was performed to correlate the IBR processing parameters to physical and electrochemical characteristics of the biocarbon obtained. Graphical abstract: Unlabelled Image Highlights: An integrated biorefinery process for corn stover biomass is demonstrated Hydrothermal liquefaction (HTL) of unhydrolyzed solids (UHS) at various parameters Facile one-step thermal activation process generated biocarbon for supercapacitors Specific capacitance of 242 F g −1 at 5 mV s −1 & power density of 9.9 Wh kg −1 in 2 M KOH Statistical modeling of HTL parameters in relation to electrochemical performance