Zhiwen Xu, Lanlu Lu, Weiwei Chen, Fei Yang, Guimei Liu, Yan Sun, Xiaoyi Qiu, M. Danny Gu, Ping Gao, Dong Su, Minhua Shao
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引用次数: 0
摘要
尽管锌空气电池（ZABs）近年来取得了长足的进步，但开发具有高催化活性和稳定性的低成本双功能电催化剂仍是一项巨大的挑战。在此，我们报告了一种由 ZIF 衍生的碳锚定铁/Fe3C 纳米粒子和铁单质原子组成的双功能氧电催化剂，它们通过碳纳米管交联（称为 CNT@Fe/Fe3C||FeNC）。得益于Fe/Fe3C纳米颗粒、Fe-N4活性位点和三维互穿网络结构的协同效应，CNT@Fe/Fe3C||FeNC显示出优异的双功能催化活性，ΔE低至0.671 V。此外，组装后的可充电 ZAB 峰值功率密度高达 187 mW cm-2，并具有长达 600 h 的优异循环稳定性。这项工作为构建非贵金属双功能催化剂在 ZAB 中的实际应用提供了新思路。
Carbon nanotubes cross-linked Fe/Fe3C Nanoparticles and Fe Single Atoms as High-efficiency Bifunctional Oxygen Electrocatalyst for Rechargeable Zinc-Air Batteries
Although zinc-air batteries (ZABs) have made great progress in recent years, there still a great challenge to develop low-cost bifunctional electrocatalysts with high catalytic activity and stability. Herein, we report a bifunctional oxygen electrocatalyst consisting of ZIF-derived carbon-anchored Fe/Fe3C nanoparticles and Fe single atoms, which are crosslinked by carbon nanotubes (denoted as CNT@Fe/Fe3C||FeNC). Benefiting from the synergetic effect of Fe/Fe3C nanoparticles, Fe-N4 active sites, and the 3D interpenetrating network structure, CNT@Fe/Fe3C||FeNC shows excellent bifunctional catalytic activities with a low ΔE of 0.671 V. Furthermore, the assembled rechargeable ZAB demonstrates a high peak power density of 187 mW cm–2 and shows excellent cycling stability up to 600 h. This work provides new ideas for constructing non-precious metal bifunctional catalysts for practical applications in ZABs.
期刊介绍：
Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.
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