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Self-Assembly of Surface-Functionalized Ag1.8Mn8O16 Nanorods with Reduced Graphene Oxide Nanosheets as an Efficient Bifunctional Electrocatalyst for Rechargeable Zinc-Air Batteries |
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| Authors: | Dr Guojun Du Dr Yun Zong Prof Xiaogang Liu Dr Zhaolin Liu |
| Institution: | 1. College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871 P. R. China
Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore Department of Environment and Materials Engineering, Jiangyin Polytechnic College, Wuxi Shi, Jiangyin, 214405 P. R. China;2. Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore;3. Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore |
| Abstract: | Bifunctional electrocatalysts play a key role in the performance of rechargeable metal-air batteries. Herein, we report a hybrid catalyst, Ag1.8Mn8O16/rGO, self-assembled by Ag1.8Mn8O16 nanorods and reduced graphene oxide (rGO) nanosheets through electrostatic attraction. The hybrid catalyst exhibits a better oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activity than commercial Pt/C in alkaline medium. When employed as an air-cathode catalyst in Zn-air cells, the hybrids enabled higher and more stable output voltage and better durability of the cells, benefitting from the improved electrode conductivity, larger surface area, and synergetic coupling as a result of its high structural integrity. |
| Keywords: | Ag1 8Mn8O16/rGO oxygen reduction reaction oxygen evolution reaction bifunctional electrocatalyst rechargeable zinc-air battery |