Interface engineered in situ anchoring of Co9S8 nanoparticles into a multiple doped carbon matrix: Highly efficient zinc-air batteries

Yang Li, Wei Zhou, Juncai Dong, Yun Luo, Pengfei An, Juan Liu, Xin Wu, Guilan Xu, Huabin Zhang, Jian Zhang

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

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 electrodes. Here, we develop a strategy aiming at the in situ anchorage of Co9S8 nanoparticles into a nitrogen (N), sulfur (S) co-implanted three-dimensional carbon matrix (Co9S8@NSCM) as a highly active and durable nonprecious metal electrocatalyst for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline medium. This strategy offers an opportunity to optimize the interface interaction and affords high activity for the ORR and OER in terms of low overpotentials and high current intensities. In addition, by confining Co9S8 nanoparticles into a N,S-doped carbon matrix, corrosion and aggregation can be effectively prevented, and thus the catalyst exhibits nearly unfading ORR catalytic performance after 100000 s testing, a low discharge-charge voltage gap (0.81 V) and a long cycle life (up to 840 cycles) in Zn-air batteries. The present work highlights potentially powerful interface engineering for designing multi-component heterostructures with advanced performances in oxygen electrochemistry and related energy conversion.
Original languageEnglish (US)
Pages (from-to)2649-2657
Number of pages9
JournalNanoscale
Volume10
Issue number5
DOIs
StatePublished - Feb 7 2018
Externally publishedYes

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