Longevous Cycling of Rechargeable Zn‐Air Battery Enabled by “Raisin‐Bread” Cobalt Oxynitride/Porous Carbon Hybrid Electrocatalysts
Source abstract
Abstract
Abstract Developing commercially viable electrocatalyst lies at the research hotspot of rechargeable Zn‐air batteries, but it is still challenging to meet the requirements of energy efficiency and durability in realistic applications. Strategic material design is critical to addressing its drawbacks in terms of sluggish kinetics of oxygen reactions and limited battery lifespan. Herein, a “raisin‐bread” architecture is designed for a hybrid catalyst constituting cobalt nitride as the core nanoparticle with thin oxidized coverings, which is further deposited within porous carbon aerogel. Based on synchrotron‐based characterizations, this hybrid provides oxygen vacancies and Co‐Nx‐C sites as the active sites, resulting from a strong coupling between CoOxNy nanoparticles and 3D conductive carbon scaffolds. Compared to the oxide reference, it performs enhanced stability in harsh electrocatalytic environments, highlighting the benefits of the oxynitride. Furthermore, the 3D conductive scaffolds improve charge/mass transportation and boost durability of these active sites. Density functional theory calculations reveal that the introduced N species into hybrid can synergistically tune the d‐band center of cobalt and improve its bifunctional activity. As a result, the obtained air cathode exhibits bifunctional overpotential of 0.65 V and a battery lifetime exceeding 1350 h, which sets a new record for rechargeable Zn‐air battery reported so far.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Advanced Photocatalysis Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Chemistry and Chemical Engineering Key Laboratory of Green Chemical Media and Reactions Henan Normal University Xinxiang 453007 China
Department of Chemical Engineering University of Waterloo Waterloo Ontario N2L 3G1 Canada
Fuel Cell Research & Demonstration Center Hydrogen Energy Research Division Korea Institute of Energy Research (KIER) Buan‐gun 56332 Republic of Korea
SUNCAT Center for Interface Science and Catalysis Department of Chemical Engineering Stanford University Stanford CA 94305 USA
School of Materials Science and Engineering Tongji University Shanghai 201804 China
Canadian Light Source University of Saskatchewan Saskatoon SK S7N 0×4 Canada
Department of Hydrogen Energy Materials Surface & Nano Materials Division Korea Institute of Materials Science (KIMS) Changwon 51508 Republic of Korea
Advanced Materials Engineering University of Science and Technology (UST) Daejeon 34113 Republic of Korea
College of Engineering Pukyong National University Busan 48547 Republic of Korea
Funding
Natural Sciences and Engineering Research Council of Canada · National Natural Science Foundation of China · National Research Foundation of Korea · University of Waterloo · Ministry of Trade, Industry and Energy
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