Effects of testing conditions on the performance of carbon-supported bifunctional electrodes

Engineering Amorphous/Crystalline Structure of Manganese Oxide for Superior Oxygen Catalytic Performance in Rechargeable Zinc–Air Batteries

“…As a matter of experience, the carbon atoms in carbon fiber paper (CFP) and Ketjenblack are unstable under high potential. When the potential applied to the working electrode is up to about 1.9 V, the carbon atoms are severely oxidized, causing CFP corrosion [48] . In this case, the high overpotential of over 600 mV shown in the polarization curve pronounce that CMO failed to efficiently catalyze OER.…”

“…When the potential applied to the working electrode is up to about 1.9 V, the carbon atoms are severely oxidized, causing CFP corrosion. [48] In this case, the high overpotential of over 600 mV shown in the polarization curve pronounce that CMO failed to efficiently catalyze OER. As for AMO, its chronopotentiometry curve shows that the potential increases by more than 100 mV at 43 h, which may be attributed to the collapse of the unstable amorphous structure of AMO under a harsh environment.…”

Essential data for industrially relevant development of bifunctional cathodes and biopolymer electrolytes in solid-state zinc–air secondary batteries

“…One of the bottlenecks limiting the development of secondary ZABs is the overpotential of the bifunctional catalyst, at discharge as well as at charge. This is a critical aspect in aqueous electrolytebased batteries because when high currents are applied during cycling, failures occur due to hydrogen evolution or carbon oxidation [20][21][22][23] . The same applies for solid and semi-solid gelled electrolytes, where high overpotentials may cause severe deterioration to the gel.…”

“…This is a critical aspect of aqueous electrolyte-based batteries because when high currents are applied during cycling, failures occur due to hydrogen evolution or carbon oxidation. 20–23 The same applies to solid and semi-solid gelled electrolytes, where high overpotentials may cause severe deterioration of the gel. The most documented techniques to evaluate the catalyst activity are linear sweep voltammetry (LSV) and cyclic voltammetry (CV) with the rotating disk electrode (RDE).…”