期刊
SMALL
卷 14, 期 19, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201704207
关键词
bifunctional oxygen electrocatalysis; electrospinning; heteroatom-doped carbon nanofibers; zeolitic imidazolate frameworks; Zn-air batteries
类别
资金
- Fundamental Research Funds for the Central Universities [NE2015003]
- Priority Academic Program Development of Jiangsu Higher Education Institution
- Six Talent Peaks Program of Jiangsu Province [2013-XNY-010]
- National Natural Science Foundation of China [21771107, 21273114]
- Natural Science Foundation of Jiangsu Province [BK20161484]
- Foundation of Graduate Innovation Center in NUAA [kfjj20160613]
Designing rational nanostructures of metal-organic frameworks based carbon materials to promote the bifunctional catalytic activity of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is highly desired but still remains a great challenge. Herein, an in situ growth method to achieve 1D structure-controllable zeolitic imidazolate frameworks (ZIFs)/polyacrylonitrile (PAN) core/shell fiber (PAN@ZIFs) is developed. Subsequent pyrolysis of this precursor can obtain a heteroatom-doped carbon nanofiber network as an efficient bifunctional oxygen electrocatalyst. The electrocatalytic performance of derived carbon nanofiber is dominated by the structures of PAN@ZIFs fiber, which is facilely regulated by efficiently controlling the nucleation and growth process of ZIFs on the surface of polymer fiber as well as optimizing the components of ZIFs. Benefiting from the core-shell structures with appropriate dopants and porosity, as-prepared catalysts show brilliant bifunctional ORR/OER catalytic activity and durability. Finally, the rechargeable Zn-air battery assembled from the optimized catalyst (CNF@Zn/CoNC) displays a peak power density of 140.1 mW cm(-2), energy density of 878.9 Wh kg(Zn)(-1), and excellent cyclic stability over 150 h, giving a promising performance in realistic application.
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