Detrimental role of hydrogen evolution and its temperature-dependent impact on the performance of vanadium redox flow batteries

Fetyan, Abdulmonem; El‐Nagar, Gumaa A.; Lauermann, Iver; Schnucklake, Maike; Schneider, Jonathan; Roth, Christina

doi:10.1016/j.jechem.2018.06.010

Cited by 57 publications

(24 citation statements)

References 33 publications

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“…They found indications that parasitic side reactions such as hydrogen evolution might become increasingly problematic at elevated temperatures. Similar observations were made in actual cells using reference electrodes to monitor the overpotentials [23] or by visualization of the formed hydrogen bubbles in transparent cells [24]. Single cell studies revealed a 90 mW•cm −2 peak power gain by increasing the operating temperature from 15 • C to 55 • C [25].…”

Section: Introductionsupporting

confidence: 72%

“…For instance, the V 2+ /V 3+ redox couple (negative) is known as a typical inner-sphere redox system which has rather poor kinetics on carbon and which is inherently sensitive to surface oxygen groups on the carbon fibers. Moreover, the negative half-cell reaction is affected by parasitic side reactions such as hydrogen formation [23,29]. Consequently, Bourke et al [30] found substantial differences in the kinetics of the negative electrode depending on oxidative or reductive pretreatment.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Operating Temperature on Individual Half-Cell Reactions in All-Vanadium Redox Flow Batteries

2018

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Systematic steady-state measurements were performed in order to investigate the effect of operating temperature on the individual half-cell reactions in all vanadium redox flow cells. Results confirm that the kinetic losses are dominated by the negative half-cell reaction. Steady-state polarization and AC impedance measurements allowed for extraction of kinetic parameters (exchange current densities, activation energy) of the corresponding half-cell reaction.

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Section: Introductionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Effect of Operating Temperature on Individual Half-Cell Reactions in All-Vanadium Redox Flow Batteries

2018

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“…The system's efficiency was measured in terms of the rate of hydrogen production, the rate of hydrogen recovery, the Coulombic efficiency, the volumetric density, and the energy recovered [61].…”

Section: Performance Calculation 421 Hydrogen Production Rate and Coulombic Efficiencymentioning

confidence: 99%

Recent Developments in Microbial Electrolysis Cell-Based Biohydrogen Production Utilizing Wastewater as a Feedstock

Dange

Pandit

Jadhav³

et al. 2021

Sustainability

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Carbon constraints, as well as the growing hazard of greenhouse gas emissions, have accelerated research into all possible renewable energy and fuel sources. Microbial electrolysis cells (MECs), a novel technology able to convert soluble organic matter into energy such as hydrogen gas, represent the most recent breakthrough. While research into energy recovery from wastewater using microbial electrolysis cells is fascinating and a carbon-neutral technology that is still mostly limited to lab-scale applications, much more work on improving the function of microbial electrolysis cells would be required to expand their use in many of these applications. The present limiting issues for effective scaling up of the manufacturing process include the high manufacturing costs of microbial electrolysis cells, their high internal resistance and methanogenesis, and membrane/cathode biofouling. This paper examines the evolution of microbial electrolysis cell technology in terms of hydrogen yield, operational aspects that impact total hydrogen output in optimization studies, and important information on the efficiency of the processes. Moreover, life-cycle assessment of MEC technology in comparison to other technologies has been discussed. According to the results, MEC is at technology readiness level (TRL) 5, which means that it is ready for industrial development, and, according to the techno-economics, it may be commercialized soon due to its carbon-neutral qualities.

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“…The composite, which was polymerized by thermal activation, demonstrates slightly lower maximum currents, while the sample achieved by acidic catalysis shows noticeably stronger evolution of hydrogen. This hydrogen evolution reaction (HER) is known as an undesirable parasitic side reaction, 56 which may also be enhanced by an increased specic surface area (marked with an arrow). Additional electrochemical impedance spectroscopy measurements were performed to study the charge transfer of the V(IV)/V(V) redox reaction.…”

Section: Electrochemical Characterization: the Positive And Negative mentioning

confidence: 99%

Porous carbon–carbon composite electrodes for vanadium redox flow batteries synthesized by twin polymerization

et al. 2020

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Detrimental role of hydrogen evolution and its temperature-dependent impact on the performance of vanadium redox flow batteries

Cited by 57 publications

References 33 publications

Effect of Operating Temperature on Individual Half-Cell Reactions in All-Vanadium Redox Flow Batteries

Effect of Operating Temperature on Individual Half-Cell Reactions in All-Vanadium Redox Flow Batteries

Recent Developments in Microbial Electrolysis Cell-Based Biohydrogen Production Utilizing Wastewater as a Feedstock

Porous carbon–carbon composite electrodes for vanadium redox flow batteries synthesized by twin polymerization

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