Atomic Dual‐Site Ni/Co‐Decorated Carbon Nanofiber Paper for Efficient O2 Electrocatalysis and Flexible Zn‐Air Battery. Issue 21 (4th November 2022)

• Record Type: Journal Article
• Authors: Liu, Nianxi; Kumar, Anuj; Li, Zongge; Liu, Zhicheng; Zhao, Changkai; Meng, Xiangshe; Wang, Yaqun; Yang, Lei; Zhang, Guoxin
• Is Part Of: ChemElectroChem. Volume 9:Issue 21(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-04
• Subjects: atomic metal -- carbon nanofiber paper -- flexible Zn-air battery -- oxygen evolution reaction -- oxygen reduction reaction; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202200888
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: The fabrication of flexible catalytic films with isolated single/dual‐atomic sites and their integration in wearable electronics is challenging. Herein, an efficient method to prepare atomically dispersed binary Ni/Co‐decorated flexible carbon nanofiber (NiCo‐CNF) film using formamide‐derived cyano‐specific NiCo‐NC as nanofillers was developed. The optimized Ni1 Co1 ‐CNF catalytic film, having large‐area, high density of adjacent Ni‐N4 and Co‐N4 active sites, and good mechanical properties under repeated bending and release conditions, possessed high catalytic activity towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The ORR/OER potential difference (Δ E 10 ) for Ni1 Co1 ‐CNF at 10.0 mA cm −2 was highly comparable with the Pt/C+RuO2 mixture. In addition, flexible Ni1 Co1 ‐CNF‐assembled Zn‐air battery displayed very good mechanical robustness and cycling stability. Our work may inspire the fabrication of other atomic metal‐decorated films for membrane electrocatalysis. Abstract : Flexible battery : Atomic dual‐site Ni/Co‐decorated carbon nanofiber (CNF) paper, Ni1 Co1 ‐CNF, with the atomic decoration of Ni/Co‐Nx species was synthesized through electrospinning using formamide‐derived cyan group‐rich nanofillers. Its assembled flexible Zn‐air battery showed very good performance under repeated bending.