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Interface engineered in situ anchoring Co9S8 nanoparticles into multiple doped carbon matrix: highly efficient zinc-air battery

Abstract

Interface modification is an effective and promising route for developing functional electrocatalysts. However, researchers have not created a reliable method to optimize the interfaces of components existing in electrocatalysts, although it is very crucial for the technological development of high-performance electrode. Here, we develop a strategy aiming at in-situ anchorage of Co9S8 nanoparticles into nitrogen (N), sulfur (S) co-implanted three-dimensional carbon matrix (Co9S8@NSCM) as a highly active and durable nonprecious metal electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline medium. This strategy offers opportunity in optimizing interface interaction and affords high activity for ORR and OER in terms of low overpotentials and high current intensities. In addition, by confining Co9S8 nanoparticles into N, S-doped carbon matrix, corrosion and aggregation can be effectively prevented, and thus the catalyst exhibits nearly unfading ORR catalytic performance after 100,000 s testing, a low discharge-charge voltage gap (0.81 V) and long cycle life (up to 840 cycles) in Zn-air batteries. The present work highlights a potentially powerful interface engineering for designing multi-components heterostructures with advanced performances in oxygen electrochemistry and related energy conversion.

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Publication details

The article was received on 28 Sep 2017, accepted on 24 Dec 2017 and first published on 26 Dec 2017


Article type: Paper
DOI: 10.1039/C7NR07235J
Citation: Nanoscale, 2017, Accepted Manuscript
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    Interface engineered in situ anchoring Co9S8 nanoparticles into multiple doped carbon matrix: highly efficient zinc-air battery

    Y. Li, W. Zhou, J. Dong, Y. Luo, P. An, J. Liu, X. Wu, G. xu, H. zhang and J. Zhang, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR07235J

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