Journal
CHEMCATCHEM
Volume 13, Issue 3, Pages 1023-1033Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.202001131
Keywords
oxygen reduction reaction; oxygen evolution reaction; Fe; Co-polyporphyrin; heteroatom-doped carbon nanotubes; zinc-air battery
Categories
Funding
- National Natural Science Foundation of China [51872115, 51932003]
- International Cooperation Project of Jilin Province [20190701022GH]
Ask authors/readers for more resources
A highly efficient bifunctional oxygen electrode catalyst for zinc-air batteries has been successfully synthesized in this study, exhibiting superior performance and stability in charge-discharge cycles.
The design and fabrication of efficient, less costly, and stable bifunctional oxygen electrode electrocatalysts is crucial for large-scale production of rechargeable zinc-air batteries. Herein, electrocatalytically active, hybrid materials composed of Fe-Co alloy nanoparticles-embedded N-doped carbon nanotubes (CNTs) are synthesized from Fe/Co-polyporphyrin-CNTs via pyrolysis. The materials serve as highly effective bifunctional oxygen electrode catalysts for zinc-air batteries. In particular, the one synthesized at 700 degrees C, named CNTs@(Fe,Co)PP-700, shows a very good activity for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) in an alkaline solution. This material catalyzes ORR with a limiting current density of 5.11 mA cm(-2) and a half-wave potential of 0.86 V vs RHE. It also catalyzes OER with 10 mA cm(-2) at a small overpotential of 360 mV. Besides, it operates well as an air cathode in a home-made rechargeable zinc-air battery, with a small voltage gap of 0.71 V at 2 mA cm(-2), while remaining stable in hundreds of charge-discharge cycles for >83 h. Its performance in a zinc-air battery is better than that of a benchmark air-electrode containing noble metals, Pt/C+RuO2.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available