Melamine-assisted pyrolytic synthesis of bifunctional cobalt-based core–shell electrocatalysts for rechargeable zinc–air batteries |
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作者姓名: | Jiqing Jiao Yuan Pan Bin Wang Wenjuan Yang Shoujie Liu Chao Zhang |
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作者单位: | Institute for New Energy Materials and Low Carbon Technologies;College of Materials Science and Engineering;State Key Laboratory of Heavy Oil Processing;Key Laboratory of Applied Surface and Colloid Chemistry;International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education;College of Chemistry and Materials Science |
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基金项目: | supported by the National Natural Science Foundation of China (51403114, 21905167);Science and Technology Innovation Program of Universities of Shandong Province (2020KJA012);Taishan Scholars Program of Shandong Province (tsqn201909065);China Postdoctoral Science Foundation (No. 2014 M56053, 2019M650232);the Opening Fund of State Key Laboratory of Heavy Oil Processing (SKLOP202002004);Fundamental Research Funds for the Central Universities (GK202003025)。 |
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摘 要: | Designing a highly active-and stable non-noble metal bifunctional oxygen catalyst for rechargeable Znair battery remains a great challenge. Herein, we develop a facile and melamine-assisted-pyrolysis(MAP)strategy for the synthesis of core–shell Co-based electrocatalysts@N-doped carbon nanotubes(Co@CNTs)derived from metal–organic frameworks. The Co@CNTs exhibited excellent bifunctional electrocatalytic performance for both oxygen evolution and reduction. DFT calculations demonstrated that the Gibbs free energy of the rate-determining step was small enough to improve ORR activities. As a result, a Zn-air battery assembled with Co@CNTs proves a lager power density, low voltage gap between charge–discharge and excellent stability. Thus, this work offers a facile strategy to realize the synthesis of non-noble metal electrocatalyst for Zn-air battery materials with high electrochemical performance.
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关 键 词: | Oxygen evolution reaction Oxygen reduction reaction Controllable synthesis Co@Carbon nanotubes Zn-air battery |
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