Article ; Online: Investigation of Highly Active Carbon‐, Cobalt‐, and Noble Metal‐Free MnO2/NiO/Ni‐Based Bifunctional Air Electrodes for Metal–Air Batteries with an Alkaline Electrolyte
Global Challenges, Vol 7, Iss 6, Pp n/a-n/a (2023)
2023
Abstract: Abstract Compared to other battery technologies, metal–air batteries offer high specific capacities because the active material at the cathode side is supplied by ambient atmosphere. To secure and further extend this advantage, the development of highly ... ...
| Abstract | Abstract Compared to other battery technologies, metal–air batteries offer high specific capacities because the active material at the cathode side is supplied by ambient atmosphere. To secure and further extend this advantage, the development of highly active and stable bifunctional air electrodes is currently the main challenge that needs to be resolved. Herein, a highly active carbon‐, cobalt‐, and noble‐metal‐free MnO2/NiO‐based bifunctional air electrode is presented for metal–air batteries in alkaline electrolytes. Notably, while electrodes without MnO2 reveal stable current densities over 100 cyclic voltammetry cycles, MnO2 containing samples show a superior initial activity and an elevated open circuit potential. Along this line, the partial substitution of MnO2 by NiO drastically increases the cycling stability of the electrode. X‐ray diffractograms, scanning electron microscopy images, and energy‐dispersive X‐ray spectra are obtained before and after cycling to investigate structural changes of the hot‐pressed electrodes. XRD results suggest that MnO2 is dissolved or transformed into an amorphous phase during cycling. Furthermore, SEM micrographs show that the porous structure of a MnO2 and NiO containing electrode is not maintained during cycling. |
|---|---|
| Keywords | air electrodes ; bifunctional ; metal–air batteries ; noble metal free ; oxygen electrodes ; Technology ; T ; Environmental sciences ; GE1-350 |
| Subject code | 620 |
| Language | English |
| Publishing date | 2023-06-01T00:00:00Z |
| Publisher | Wiley |
| Document type | Article ; Online |
| Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
Full text online
More links
Kategorien
Inter-library loan at ZB MED
Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.