globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2020.12.019
论文题名:
Holey aligned electrodes through in-situ ZIF-8-assisted-etching for high-performance aqueous redox flow batteries
作者: Sun J.; Jiang H.; Zhao C.; Fan X.; Chao C.; Zhao T.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
语种: 英语
中文关键词: Aligned structure ; Electrospinning ; High-performance electrodes ; Holey fiber ; Redox flow battery ; ZIF-8
英文关键词: Current density ; Electrodes ; Electrospinning ; Energy efficiency ; Etching ; Fibers ; Holey fibers ; Redox reactions ; Surface reactions ; Electrode structure ; Electrospinning method ; Electrospinning process ; High current densities ; Large specific surface areas ; Limiting current density ; Peak power densities ; Vanadium redox flow batteries ; Flow batteries
英文摘要: Fabricating electrodes with large specific surface area (SSA) and high permeability has been the long-standing target in redox flow batteries (RFBs). In this work, we propose a novel ZIF-8-assisted etching approach to form holey fibers in the electrospinning process of aligned electrode structures. The etching approach allows the formation of holey fibers with small pores of ~50 nm, offering large active surface areas for redox reactions, while the aligned macrostructure with the holey fibers of 3–5 μm in diameter ensures a high permeability along the fiber direction. The application of the prepared electrodes to a vanadium redox flow battery (VRFB) enables an energy efficiency (EE) of 87.2% at the current density of 200 mA cm−2, which is 13.3% higher than that with conventional electrospun carbon electrodes. Even at high current densities of 300 and 400 mA cm−2, the battery still maintains energy efficiencies of 83.3% and 79.3%. More excitingly, the prepared electrode yields a high limiting current density of 4500 mA cm−2 and a peak power density of 1.6 W cm−2. It is anticipated that the present electrospinning method combining the ZIF-8-assisted etching approach with a way to form ordered fiber structures will allow even more high-performance electrodes for RFBs in the future. © 2020 Science China Press
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170037
Appears in Collections:气候变化与战略

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作者单位: Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong; Building Energy Research Center, Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, 511458, China; Institute for Advanced Study, The Hong Kong University of Science and Technology, Hong Kong

Recommended Citation:
Sun J.,Jiang H.,Zhao C.,et al. Holey aligned electrodes through in-situ ZIF-8-assisted-etching for high-performance aqueous redox flow batteries[J]. Science Bulletin,2020-01-01
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