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Abstract Rechargeable Zn-air battery (ZAB) still relies on the precious metal-based catalysts, whose high cost, supply scarcity and inferior durability largely hamper the large-scale application of ZAB. Herein, a non-noble-metal… Click to show full abstract
Abstract Rechargeable Zn-air battery (ZAB) still relies on the precious metal-based catalysts, whose high cost, supply scarcity and inferior durability largely hamper the large-scale application of ZAB. Herein, a non-noble-metal catalyst towards both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is successfully constructed by carbonizing metal-organic frameworks (MOFs) functionalized electrospun nanofibers. The obtained bifunctional electrocatalyst shows good catalytic performance with comparable limiting diffusion current to Pt/C and comparable potential to RuO2, in particular, superior stability to both Pt/C and RuO2 towards ORR and OER. In view of the efficient bifunctional catalyst activity for ORR and OER, the obtained catalyst in ZAB displays high charge/discharge performance and long cycling stability, demonstrating great potential in grid-scale energy storage.
Journal Title: Applied Surface Science
Year Published: 2019
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