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Issue 3, 2019
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Air cathode of zinc–air batteries: a highly efficient and durable aerogel catalyst for oxygen reduction

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Abstract

In this communication, N-doped carbon shell encapsulated Co3O4@Co nanoparticles (NPs) were assembled on N-doped reduced graphene oxide to form non-precious metal aerogels (Co3O4@Co/N-r-GO) for oxygen reduction. In an alkaline medium, the aerogels exhibit comparable oxygen reduction reaction (ORR) performances to the commercial Pt/C with respect to half-wave potential, current density and durability. Zn–air batteries (ZABs) assembled with Co3O4@Co/N-r-GO as the air cathode display high average voltages of ∼1.38 and ∼1.3 V at a current density of 1 and 5 mA cm−2, respectively, and show a specific capacity of ∼800 mA h g−1. These results demonstrate that Co3O4@Co/N-r-GO materials are highly active and durable ORR catalysts for ZABs. The unique structure of the composite aerogel, i.e. the carbon shell encapsulated Co3O4@Co NPs and the 3D interconnected macroporous N-r-GO matrix, is responsible for its high ORR activity and stability.

Graphical abstract: Air cathode of zinc–air batteries: a highly efficient and durable aerogel catalyst for oxygen reduction

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Publication details

The article was received on 11 Sep 2018, accepted on 08 Dec 2018 and first published on 10 Dec 2018


Article type: Communication
DOI: 10.1039/C8NR07386D
Nanoscale, 2019,11, 826-832

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    Air cathode of zinc–air batteries: a highly efficient and durable aerogel catalyst for oxygen reduction

    L. Zhang, X. Yang, R. Cai, C. Chen, Y. Xia, H. Zhang, D. Yang and X. Yao, Nanoscale, 2019, 11, 826
    DOI: 10.1039/C8NR07386D

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