期刊
ENERGY STORAGE MATERIALS
卷 25, 期 -, 页码 137-144出版社
ELSEVIER
DOI: 10.1016/j.ensm.2019.10.021
关键词
Electrospinning; Metal-organic-framework; Zeolitic imidazolate framework; Zinc-air battery; Oxygen reduction reaction
资金
- Advanced Energy Storage Research Programme - Science and Engineering Research Council (SERC), A*STAR (Agency for Science, Technology and Research), Singapore [IMRE/12-2P0504, 1229904044]
- MOE under AcRF Tier 2 [MOE2015-T2-2-057, MOE2016-T2-2-103, MOE2017-T2-1-162]
- MOE under AcRF Tier 1 [2016-T1-002-051, 2017-T1-001-150, 2017-T1-002-119]
- NTU under Start-Up Grant in Singapore [M4081296.070.500000]
- ITC via Hong Kong Branch of National Precious Metals Material Engineering Research Center
- City University of Hong Kong
ZIF-67 comprises alternately arranged cobalt atoms and nitrogen-rich organic linkers, making it an ideal single source precursor to producing Co and N co-doped carbon (C-ZIF-67) catalyst for oxygen reduction reaction (ORR). C-ZIF-67 particle catalyst in air-cathode, however, often shows limited activity and stability because of the particle-to-particle resistances and particle detachment issues. Herein, we introduce an in-situ approach to selectively growing ZIF-67 on electrospun polyacrylonitrile (PAN) fibers, forming an interesting gems-on-string structured PAN@ZIF-67 hybrid. Upon pyrolysis the hybrid is converted to conducive C-PAN@ZIF-67 with well-retained hierarchical structure, showing high ORR activity with excellent durability in alkaline electrolyte. A zincair battery (ZnAB) using C-PAN@ZIF-67 in air-cathode delivers a stable discharge voltage of 1.24 V at a high current density of 20 mA cm(-2). With the regeneration of the cell after its full-discharges by mechanically replenishing the zinc anode and the electrolyte, a continuous operation over 38 days is demonstrated with the discharge voltage above 1.0 V at a current density of 10 mA cm(-2). Significantly, a freestanding C-PAN@ZIF-67 mat serves directly as the flexible cathode for thin and bendable ZnABs to deliver high discharge voltages in both flat and bent states, promising great potential for future wearable electronics.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据