Reduction of the Electrode Overpotential of the Oxygen Evolution Reaction by Electrode Surface Modification
| Autor: | Mei-Jing Li, Cian-Tong Lu, Ju-Shei Hung, Kan-Lin Hsueh, Yen-Wen Chiu |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Article Subject
Chemistry Abundance (chemistry) Whiskers Metallurgy Oxygen evolution 02 engineering and technology Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Energy storage 0104 chemical sciences lcsh:Chemistry lcsh:QD1-999 Chemical engineering Electrode Energy density Surface modification 0210 nano-technology |
| Zdroj: | International Journal of Electrochemistry, Vol 2017 (2017) |
| ISSN: | 2090-3529 |
| DOI: | 10.1155/2017/7494571 |
| Popis: | Metal–air batteries exhibit high potential for grid-scale energy storage because of their high theoretical energy density, their abundance in the earth’s crust, and their low cost. In these batteries, the oxygen evolution reaction (OER) occurs on the air electrode during charging. This study proposes a method for improving the OER electrode performance. The method involves sequentially depositing a Ni underlayer, Sn whiskers, and a Ni protection layer on the metal mesh. Small and uniform gas bubbles form on the Ni/Sn/Ni mesh, leading to low overpotential and a decrease in the overall resistance of the OER electrode. The results of a simulated life cycle test indicate that the Ni/Sn/Ni mesh has a life cycle longer than 1,300 cycles when it is used as the OER electrode in 6 M KOH. |
| Databáze: | OpenAIRE |
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