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Fabrication and Characterization of Environmentally Friendly Biochar Anode

Author

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  • Ieva Kiminaitė

    (Laboratory of Combustion Processes, Lithuanian Energy Institute, Breslaujos St. 3, LT-44403 Kaunas, Lithuania)

  • Aurimas Lisauskas

    (Laboratory of Combustion Processes, Lithuanian Energy Institute, Breslaujos St. 3, LT-44403 Kaunas, Lithuania)

  • Nerijus Striūgas

    (Laboratory of Combustion Processes, Lithuanian Energy Institute, Breslaujos St. 3, LT-44403 Kaunas, Lithuania)

  • Žilvinas Kryževičius

    (Vezaiciai Branch, Research Centre for Agriculture and Forestry, Institute of Agriculture, LT-96216 Vezaiciai, Lithuania
    Engineering Department, Faculty of Marine Technology and Natural Sciences, Klaipeda University, H. Manto St. 84, LT-92294 Klaipeda, Lithuania)

Abstract

Electrical power generation by means of electrochemical systems utilizing wastewaters is a global energy challenge tackling technique for which a creation of novel eco-friendly electrode materials is in high relevance. For this purpose a Rhodophyta algae derived activated biochar anode bound with a flaxseeds mucilage binder (5, 10, 20, 30 wt.%) was formed and characterized by thermogravimetric, Brunauer-Emmett-Teller (BET) analysis as well as conductivity and mechanical resistance determination. Activation technique with KOH prior to carbonization at 800 °C of algae was employed to obtain biocarbon with a large surface area. The highest specific surface area of 1298.49 m 2 /g was obtained with the binder-free sample and had a tendency to decrease with the increase of the binder content. It was estimated that biochar anodes are thermally stable at the temperature of up to 200 °C regardless of binder concentration. The concentration of the binder on the other hand had a significant influence in anodes mechanical resistance and electrical conductance: anode with 30 wt.% of the binder had the highest compressive strength equal to 104 bar; however, the highest conductivity was estimated in anode with 5 wt.% of the binder equal to 58 S/m. It is concluded that anode with 10 wt.% mucilage binder has the optimal properties necessary in MFC utilization.

Suggested Citation

  • Ieva Kiminaitė & Aurimas Lisauskas & Nerijus Striūgas & Žilvinas Kryževičius, 2021. "Fabrication and Characterization of Environmentally Friendly Biochar Anode," Energies, MDPI, vol. 15(1), pages 1-13, December.
    • Handle: RePEc:gam:jeners:v:15:y:2021:i:1:p:112-:d:710189
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    References listed on IDEAS

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    1. Slate, Anthony J. & Whitehead, Kathryn A. & Brownson, Dale A.C. & Banks, Craig E., 2019. "Microbial fuel cells: An overview of current technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 101(C), pages 60-81.
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