Selection of oxygen reduction catalysts for secondary tri-electrode zinc–air batteries
Abstract Oxygen reduction reaction (ORR) electrocatalysts, which are highly efficient, low-cost, yet durable, are important for secondary Zn–air cell applications. ORR activities of single and mixed metal oxide and carbon electrocatalysts were studied using rotating disc electrode (RDE) measurements...
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| Format: | Article |
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Nature Portfolio
2022-04-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-10671-5 |
| _version_ | 1817990889445785600 |
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| author | Adeline Loh David P. Trudgeon Xiaohong Li Mao-Cheng Liu Ling-Bin Kong Frank C. Walsh |
| author_facet | Adeline Loh David P. Trudgeon Xiaohong Li Mao-Cheng Liu Ling-Bin Kong Frank C. Walsh |
| author_sort | Adeline Loh |
| collection | DOAJ |
| description | Abstract Oxygen reduction reaction (ORR) electrocatalysts, which are highly efficient, low-cost, yet durable, are important for secondary Zn–air cell applications. ORR activities of single and mixed metal oxide and carbon electrocatalysts were studied using rotating disc electrode (RDE) measurements, Tafel slope and Koutecky–Levich plots. It was found that MnOx combined with XC-72R demonstrated high ORR activity and good stability—up to 100 mA cm−2. The performance of the selected ORR electrode and a previously optimised oxygen evolution reaction (OER) electrode was thereafter tested in a custom-built secondary Zn–air cell in a tri-electrode configuration, and the effects of current density, electrolyte molarity, temperature, and oxygen purity on the performance of the ORR and OER electrode were investigated. Finally, the durability of the secondary Zn–air system was assessed, demonstrating energy efficiencies of 58–61% at 20 mA cm−2 over 40 h in 4 M NaOH + 0.3 M ZnO at 333 K. |
| first_indexed | 2024-04-14T01:05:59Z |
| format | Article |
| id | doaj.art-1f4781ffb0834174aaff454683073602 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-14T01:05:59Z |
| publishDate | 2022-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-1f4781ffb0834174aaff4546830736022022-12-22T02:21:14ZengNature PortfolioScientific Reports2045-23222022-04-0112111610.1038/s41598-022-10671-5Selection of oxygen reduction catalysts for secondary tri-electrode zinc–air batteriesAdeline Loh0David P. Trudgeon1Xiaohong Li2Mao-Cheng Liu3Ling-Bin Kong4Frank C. Walsh5Renewable Energy Group, College of Engineering, Mathematics and Physical Sciences, University of ExeterRenewable Energy Group, College of Engineering, Mathematics and Physical Sciences, University of ExeterRenewable Energy Group, College of Engineering, Mathematics and Physical Sciences, University of ExeterState Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, School of Materials Science and Engineering, Lanzhou University of TechnologyState Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, School of Materials Science and Engineering, Lanzhou University of TechnologyElectrochemical Engineering Laboratory, Energy Technology Group, Department of Mechanical Engineering, University of SouthamptonAbstract Oxygen reduction reaction (ORR) electrocatalysts, which are highly efficient, low-cost, yet durable, are important for secondary Zn–air cell applications. ORR activities of single and mixed metal oxide and carbon electrocatalysts were studied using rotating disc electrode (RDE) measurements, Tafel slope and Koutecky–Levich plots. It was found that MnOx combined with XC-72R demonstrated high ORR activity and good stability—up to 100 mA cm−2. The performance of the selected ORR electrode and a previously optimised oxygen evolution reaction (OER) electrode was thereafter tested in a custom-built secondary Zn–air cell in a tri-electrode configuration, and the effects of current density, electrolyte molarity, temperature, and oxygen purity on the performance of the ORR and OER electrode were investigated. Finally, the durability of the secondary Zn–air system was assessed, demonstrating energy efficiencies of 58–61% at 20 mA cm−2 over 40 h in 4 M NaOH + 0.3 M ZnO at 333 K.https://doi.org/10.1038/s41598-022-10671-5 |
| spellingShingle | Adeline Loh David P. Trudgeon Xiaohong Li Mao-Cheng Liu Ling-Bin Kong Frank C. Walsh Selection of oxygen reduction catalysts for secondary tri-electrode zinc–air batteries Scientific Reports |
| title | Selection of oxygen reduction catalysts for secondary tri-electrode zinc–air batteries |
| title_full | Selection of oxygen reduction catalysts for secondary tri-electrode zinc–air batteries |
| title_fullStr | Selection of oxygen reduction catalysts for secondary tri-electrode zinc–air batteries |
| title_full_unstemmed | Selection of oxygen reduction catalysts for secondary tri-electrode zinc–air batteries |
| title_short | Selection of oxygen reduction catalysts for secondary tri-electrode zinc–air batteries |
| title_sort | selection of oxygen reduction catalysts for secondary tri electrode zinc air batteries |
| url | https://doi.org/10.1038/s41598-022-10671-5 |
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