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Bimetallic Metal-Organic-Framework/Reduced Graphene Oxide Composite as Bifunctional Electrocatalyst for Rechargeable Zn-Air Batteries.

08:00 EDT 9th April 2019 | BioPortfolio

Summary of "Bimetallic Metal-Organic-Framework/Reduced Graphene Oxide Composite as Bifunctional Electrocatalyst for Rechargeable Zn-Air Batteries."

The most challenging issue in the development of metal-air batteries is the insufficient catalytic activity of cathode towards oxygen evolution and reduction reactions (OER/ORR). Metal-organic frameworks (MOFs) and MOF-based electrocatalysts have drawn considerable attention for replacement of noble-metal electrocatalysts. Here, the rational design and synthesis of bimetallic CoNi-MOF nanosheets/Reduced Graphene Oxide (rGO) hybrid electrocatalyst is reported. The CoNi-MOF nanosheets were in situ grown onto rGO assisted by the surfactant modulation. The newly developed CoNi-MOF/rGO hybrid, consisting of homogeneously distributed nanosheets encapsulated by rGO, display excellent electrocatalytic activities towards OER and ORR. The much improved bifunctional catalytic performance is ascribed to the synergy among the CoNi-MOF nanosheets and rGO, the abundant exposed active sites and the enhanced electron conductivity. Moreover, the rechargeable Zn-air battery with CoNi-MOF/rGO based air electrode displays high energy density and cycling stability, demonstrating the great potential as advanced bifunctional electrocatalysis in electronic devices.

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This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
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