Issue 24, 2023

Cobalt selenide with ordered cation vacancies for efficient oxygen reduction and frigostable Al–air batteries

Abstract

Aluminum–air batteries are still inhibited by the sluggish cathodic oxygen reduction reactions, especially in low temperature conditions. Thus, it is urgent to develop efficient electrocatalysts for Al–air batteries to allow their use in extreme weather conditions. In this work, hexagonal Co0.85Se-decorated N,Se co-doped carbon nanofibers (Co0.85Se@N,Se-CNFs) were synthesized via facile carbonization/selenization of electrospun ZIF-67 nanocubes. The as-prepared metallic Co0.85Se with ordered structural cation vacancies endows Co0.85Se@N,Se-CNFs with remarkable oxygen reduction reaction activity, including high onset and half-wave potentials (0.93 V and 0.87 V vs. RHE, respectively). Consequently, the corresponding Al–air battery exhibits superior performance in a wide range of operating temperatures (−40–50 °C). For instance, this Al–air battery exhibits a voltage from 0.15–1.2 V with a peak power density of about 0.7 mW cm−2 at −40 °C. It is expected that TMSe-decorated N,Se co-doped carbon nanofibers could be applied in extensive energy fields.

Graphical abstract: Cobalt selenide with ordered cation vacancies for efficient oxygen reduction and frigostable Al–air batteries

Supplementary files

Article information

Article type
Paper
Submitted
25 Feb 2023
Accepted
16 May 2023
First published
16 May 2023

Nanoscale, 2023,15, 10383-10393

Cobalt selenide with ordered cation vacancies for efficient oxygen reduction and frigostable Al–air batteries

J. Liu, C. Zhang, C. Xu, W. Yang, Y. Cao and H. Lu, Nanoscale, 2023, 15, 10383 DOI: 10.1039/D3NR00888F

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