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Ten thousand hour stable zinc air batteries via Fe and W dual atom sites
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Journal Article
Ten thousand hour stable zinc air batteries via Fe and W dual atom sites
2025
Overview
Durable and highly active oxygen electrocatalysts are crucial to the large-scale application of rechargeable zinc-air batteries. Here we utilize the N
4
unit in phthalocyanine molecule to trap the tungsten atoms scratched off from the tungsten carbide milling balls and place the obtained W-N
4
unit adjacent to the Fe-N
4
units from iron (Ⅱ) phthalocyanine, resulting in highly active Fe-N
4
/W-N
4
diatomic sites with well-pronounced 3
d
−5
d
hybrid for efficient and durable oxygen electrocatalysis. The electron distribution of the Fe-N
4
site is optimized by the neighboring W-N
4
site, which facilitates the O
2
activation and the desorption of *OH and enhances the catalytic activity of the Fe-N
4
site. Meanwhile, the unsaturated 5
d
orbitals and tunable valence of the W atoms could modulate the electronic state of the Fe species, prevent leaching, and further enhance the catalytic stability. The resulting zinc-air battery with Fe,W-N-C air cathode exhibits notable cycling stability and repeatability for over 10,000 h. This enhanced stability highlights the possibility of developing 5
d
metal-boosted 3
d
metal active sites for the fabrication of efficient oxygen electrocatalysts and stable zinc-air batteries.
Long-lasting oxygen catalysts are crucial for rechargeable zinc-air batteries. Here, the authors report that placing tungsten atoms next to iron atoms within N
4
units creates durable Fe-N
4
/W-N
4
diatomic sites, enabling a zinc-air battery to cycle reliably for more than 10,000 h.
