Mn-doped Co nanoparticles on wood-derived monolithic carbon for rechargeable zinc-air batteries
The large-scale applications of zincair batteries (ZABs) as vital energy storage devices have been limited by the sluggish kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in the air electrode. Herein, Mn-doped Co nanoparticles on cedarwood-derived carbon (CoMn-N@N...
Saved in:
Published in | Journal of materials chemistry. A, Materials for energy and sustainability Vol. 11; no. 42; pp. 22951 - 22959 |
---|---|
Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Cambridge
Royal Society of Chemistry
31.10.2023
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The large-scale applications of zincair batteries (ZABs) as vital energy storage devices have been limited by the sluggish kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in the air electrode. Herein, Mn-doped Co nanoparticles on cedarwood-derived carbon (CoMn-N@NCW) are fabricated as a bifunctional catalyst to boost the reaction kinetics. The as-prepared catalyst shows a half-wave potential of 0.885 V for the ORR and an overpotential of 335 mV at 10 mA cm
2
for the OER in alkaline electrolytes. ZABs based on the catalyst exhibit a high peak power density of 186 mW cm
2
and a robust lifetime of 600 h. The quasi-solid-state ZABs assembled with CoMn-N@NCW exhibit a splendid open-circuit voltage of 1.493 V and a long-term cycling stability of 70 h. Oxygen electrocatalytic kinetics are improved by the electronic modulation of cobalt from adjacent manganese and the rapid mass transfer of porous biomass carbon. This work provides a remarkable inspiration to prepare a practically applicable oxygen electrode for ZABs.
An effective strategy
via in situ
growth of MOFs in biomass carbon together with co-pyrolysis is proposed to prepare a monolithic air electrode with highly dispersed Mn and Co nanoparticles anchored on wood-derived carbon (CoMn-N@NCW) for ZABs. |
---|---|
Bibliography: | Electronic supplementary information (ESI) available. See DOI https://doi.org/10.1039/d3ta05023h |
ISSN: | 2050-7488 2050-7496 |
DOI: | 10.1039/d3ta05023h |