Abstract
Robust bifunctional and highly efficient electrocatalysts for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) exhibits great prospect in a zinc-air battery (ZAB). Here, we demonstrated a facile route to synthesize a bifunctional electrocatalyst with CoO nanoparticles embedded in N-doped carbon by interface engineering. The precursor which consists of ball-milled polyaniline (BM-PANI), carbon nanotubes (CNTs) and cobalt acetate tetrahydrate (Co(Ac)2·4H2O) was obtained via homogeneous mixture in the presence of ethanol, and thus, satisfactory interface was formed. After calcination, the synthesized CoO/N-doped carbon composite material presents a half-wave potential of 0.818 V for ORR and an overpotential of 0.417 V at 10 mA cm−2 for OER, which endows it a power density of 92.04 mW cm−2 in a homemade rechargeable ZAB and a high stability outperforming commercial Pt/C. This work highlights the mixture of precursors by interface engineering, thus improving the synergistic effect between metal oxide and carbon and elevating the electrocatalytic activity.
Funder
Scientific Research Projects of Jilin Provincial Department of Education
Jilin Provincial Science and Technology Development Foundation
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials
Cited by
3 articles.
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