A comparative study of different electrochemical methods to determine cell internal parameters of microbial fuel cells
| Autor: | Stefan Krimmler, Deepak Pant, Ernst Murnleitner, Marc Wichern, Tito Gehring, Manfred Lübken, Edith Nettmann, Tobias Littfinski, Jürgen Heinrichmeier |
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| Rok vydání: | 2021 |
| Předmět: |
Microbial fuel cell
Materials science Maximum power principle Renewable Energy Sustainability and the Environment Analytical chemistry Energy Engineering and Power Technology 02 engineering and technology Internal resistance 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Maximum power point tracking 0104 chemical sciences Dielectric spectroscopy Linear sweep voltammetry Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Pulse-width modulation |
| Zdroj: | Journal of Power Sources. 494:229707 |
| ISSN: | 0378-7753 |
| Popis: | The efficient energy recovery from wastewater through microbial fuel cells (MFC) depends on a comprehensive understanding of the electrochemical properties of the system. Different methods to infer electrochemical parameters can be applied. However, the absence of studies confirming the compatibility and inter-validity of these methods makes their comparison difficult. In this study six different electrochemical methods were compared in triplicate MFCs: i) varying circuit resistance (VCR); ii) linear sweep voltammetry (LSV); iii) current interruption (CI); iv) electrochemical impedance spectroscopy (EIS); v) pulse width modulation (R-PWM); and vi) the perturbation observation (P/O) algorithm. Comparative investigations of the ohmic resistances from CI (73.0 ± 11.4 Ω), EIS (70.8 ± 11.1 Ω) and R-PWM (73.3 ± 11.2 Ω) showed high agreement. Further analysis of the activation resistances using detailed model-based methods, such as EIS (26.0 ± 10.9 Ω) and R-PWM (25.0 ± 3.0 Ω) demonstrated that both methods provide identical results. The applicability of the R-PWM mode as a real-time optimization method can be supported by the calculated maximum power densities from VCR and LSV together with the adjusted resistance from the P/O algorithm. In R-PWM mode theoretical power densities up to 95% of the maximum power point can be achieved. |
| Databáze: | OpenAIRE |
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