Performance of a combined electrotrophic and electrogenic biofilm operated under long-term, continuous cycling.
Biotechnol Lett
; 46(2): 213-221, 2024 Apr.
Article
en En
| MEDLINE
| ID: mdl-38300444
ABSTRACT
OBJECTIVES:
Evaluate electrochemically active biofilms as high energy density rechargeable microbial batteries toward providing persistent power in applications where traditional battery technology is limiting (, remote monitoring applications).RESULTS:
Here we demonstrated that an electrochemically active biofilm was able to store and release electrical charge for alternating charge/discharge cycles of up to 24 h periodicity (50% duty cycle) with no significant decrease in average current density (0.16 ± 0.04 A/m2) for over 600 days. However, operation at 24 h periodicity for > 50 days resulted in a sharp decrease in the current to nearly zero. This current crash was recoverable by decreasing the periodicity. Overall, the coulombic efficiency remained near unity within experimental error (102 ± 3%) for all of the tested cycling periods. Electrochemical characterization here suggests that electron transfer occurs through multiple routes, likely a mixture of direct and mediated mechanisms.CONCLUSIONS:
These results indicate that bidirectional electrogenic/electrotrophic biofilms are capable of efficient charge storage/release over a wide range of cycling frequency and may eventually enable development of sustainable, high energy density rechargeable batteries.Palabras clave
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Fuentes de Energía Bioeléctrica
Idioma:
En
Revista:
Biotechnol Lett
Año:
2024
Tipo del documento:
Article
País de afiliación:
Estados Unidos