Rational modulation of N, P co-doped carbon nanotubes encapsulating Co3Fe7 alloy as bifunctional oxygen electrocatalysts for Zinc–Air batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

18 Scopus Citations
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Author(s)

  • Yaming Ma
  • Lang Gan
  • Dan Li
  • Yiyang Gao
  • Xuxiao Yang
  • Ke Wang
  • Hu Wu
  • Shujiang Ding
  • Chunhui Xiao

Detail(s)

Original languageEnglish
Article number227177
Number of pages9
Journal / PublicationJournal of Power Sources
Volume441
Online published17 Oct 2019
Publication statusPublished - 30 Nov 2019
Externally publishedYes

Abstract

Rational design and development of non-precious metal-based electrocatalysts for bifunctional oxygen reduction/evolution reactions (ORR/OER) are essential to realize the dischargeable Zinc-air batteries (ZABs). Herein, for the first time we synthesize CoFe-alloy nanoparticles enveloped by N, P co-doped carbon nanotubes (NPMC/CoFe), through a simple route by pyrolyzing dicyandiamide complex in the presence of phytic acid. The obtained electrocatalysts possess excellent ORR (a half wave potential of 0.896 V in 0.1 M KOH) and OER (η10 mA cm-2 = 310 mV in 1 M KOH) performance, respectively. The liquid-state ZABs based on the NPMC/CoFe air-cathode demonstrates a high peak power density of 146.34 mW cm-2 and excellent durability. Specifically, flexible and button-like ZABs with impressive performances are both realized, which could power light-emitting diodes. This work offers an attractive approach to develop the nonprecious metal-based ORR/OER catalysts, and modulators for the design of performance oriented electrocatalysts for wider electrochemical energy applications.

Research Area(s)

  • Co3Fe7 alloy, Carbon nanotubes, Oxygen electrocatalysts, Zinc-air batteries, Energy conversion

Citation Format(s)

Rational modulation of N, P co-doped carbon nanotubes encapsulating Co3Fe7 alloy as bifunctional oxygen electrocatalysts for Zinc–Air batteries. / Ma, Yaming; Gan, Lang; Li, Dan; Gao, Yiyang; Yang, Xuxiao; Wang, Ke; Lu, Shiyao; Wu, Hu; Ding, Shujiang; Xiao, Chunhui.

In: Journal of Power Sources, Vol. 441, 227177, 30.11.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review