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Fabrication and characterization of environmentally friendly biochar anode
Kiminaitė, Ieva | Lietuvos energetikos institutas | LT | ||
Lisauskas, Aurimas | Lietuvos energetikos institutas | LT | ||
Striūgas, Nerijus | Lietuvos energetikos institutas | LT | ||
LT | Lietuvos agrarinių ir miškų mokslų centras | LT |
| Date Issued | Volume | Issue | Start Page | End Page |
|---|---|---|---|---|
2022 | vol. 15 | no. 1, art. no. 112 | 1 | 13 |
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 m2/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.