The anode and cathode electrodes of a microbial fuel cell (MFC) stack composed of 28 single MFCs were used as the negative and positive electrodes, respectively of an internal self-charged supercapacitor. Particularly, carbon veil was used as the negative electrode and activated carbon with a Fe-based catalyst was used as positive electrode. The red-ox reactions on the anode and cathode, self-charged these electrodes creating an internal electrochemical double layer capacitor. Galvanostatic discharges were performed at different current and time pulses. Supercapacitive-MFC (SC-MFC) was also tested at four different solution conductivities. SC-MFC had an equivalent series resistance (ESR) decreasing from 6.00 Ω to 3.42 Ω in four solutions with conductivity between 2.5 mScm-1 and 40 mScm-1. The ohmic resistance of the positive electrode corresponded to 75-80% of the overall ESR. The highest performance was achieved with a solution conductivity of 40 mS cm-1 and was higher due to the positive electrode potential enhancement for the utilization of Fe-based catalysts. Maximum power was 36.9 mW (36.9 W m-3) that decreased with increasing pulse time. SC-MFC was subjected to 4520 cycles (8 days) with a pulse time of 5 s (ipulse 55 mA) and a self-recharging time of 150 s showing robust reproducibility.

Santoro, C., Kodali, M., Shamoon, N., Serov, A., Soavi, F., Merino-Jimenez, I., et al. (2019). Increased power generation in supercapacitive microbial fuel cell stack using Fe-N-C cathode catalyst. JOURNAL OF POWER SOURCES, 412, 416-424 [10.1016/j.jpowsour.2018.11.069].

Increased power generation in supercapacitive microbial fuel cell stack using Fe-N-C cathode catalyst

Santoro C
Primo
;
2019

Abstract

The anode and cathode electrodes of a microbial fuel cell (MFC) stack composed of 28 single MFCs were used as the negative and positive electrodes, respectively of an internal self-charged supercapacitor. Particularly, carbon veil was used as the negative electrode and activated carbon with a Fe-based catalyst was used as positive electrode. The red-ox reactions on the anode and cathode, self-charged these electrodes creating an internal electrochemical double layer capacitor. Galvanostatic discharges were performed at different current and time pulses. Supercapacitive-MFC (SC-MFC) was also tested at four different solution conductivities. SC-MFC had an equivalent series resistance (ESR) decreasing from 6.00 Ω to 3.42 Ω in four solutions with conductivity between 2.5 mScm-1 and 40 mScm-1. The ohmic resistance of the positive electrode corresponded to 75-80% of the overall ESR. The highest performance was achieved with a solution conductivity of 40 mS cm-1 and was higher due to the positive electrode potential enhancement for the utilization of Fe-based catalysts. Maximum power was 36.9 mW (36.9 W m-3) that decreased with increasing pulse time. SC-MFC was subjected to 4520 cycles (8 days) with a pulse time of 5 s (ipulse 55 mA) and a self-recharging time of 150 s showing robust reproducibility.
Articolo in rivista - Articolo scientifico
Supercapacitor; Microbial fuel cell; Galvanostatic discharges; Fe-based catalyst; Long terms stability;
English
30-nov-2018
2019
412
416
424
open
Santoro, C., Kodali, M., Shamoon, N., Serov, A., Soavi, F., Merino-Jimenez, I., et al. (2019). Increased power generation in supercapacitive microbial fuel cell stack using Fe-N-C cathode catalyst. JOURNAL OF POWER SOURCES, 412, 416-424 [10.1016/j.jpowsour.2018.11.069].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/301202
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