Indexed on: 04 Apr '19Published on: 03 Apr '19Published in: Chemistry - An Asian Journal
Practical application of Zn-air batteries is usually limited by sluggish kinetics of oxygen reduction reaction. Replacing Pt-based catalysts with convenient, efficient and low-cost materials to boost oxygen reduction reaction is highly desirable. Herein, a class of Fe-N-codoped carbon nanofibers, are successfully synthesized via pyrolysis of polyacrylonitrile/metal-containing ionic liquid-based electrospun films. The ionic liquids act as porogen to provide multiscale pores as well as activator to bring carbon nanofibers active sites. The catalyst possessing appropriate active sites and unique 3D porous architecture exhibits remarkable long-term stability and electrocatalytic activity. Particularly, the catalyst maintains a shape of membrane after carbonization, manifesting its direct use as air electrode without binders. It is notable that all-solid-state Zn-air battery based on the carbon nanofibers exhibits good flexibility, indicating its promising application as wearable devices. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.