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Cited by 426

The DOI matches its Crossref record; 40 of the 40 references it cites were found in a registry or an index.

Halogenated Zn2+ Solvation Structure for Reversible Zn Metal Batteries

Zhang, Qiu, Ma, Yilin, Lu, Yong, Ni, Youxuan, Lin, Liu, Hao, Zhenkun, Yan, Zhenhua, Zhao, Qing, Chen, Jun·2022·Journal of the American Chemical Society

Abstract

Rechargeable aqueous Zn metal batteries have become promising candidates for large-scale electrochemical energy storage owing to their high safety and affordable low cost. However, Zn metal anode suffers from dendritic growth and hydrogen evolution reaction (HER), deteriorating the electrochemical performance. Here, we demonstrate that these challenges can be conquered by introducing a halogen ion into the Zn 2+ solvation structure. By designing an electrolyte composed of zinc acetate and ammonium halide, the electron-donating anion I – can coordinate with Zn 2+ and transform the traditional Zn(H 2 O) 6 2+ to ZnI(H 2 O) 5 +, in which I – could transfer electrons into H 2 O and thus suppress HER. The dynamic electrostatic shielding layer formed by concomitant NH 4 + can restrict the dendritic growth. As a result, the halogenated electrolyte achieves a high initial coulombic efficiency (CE) of 99.3% in the Zn plating/stripping process and remains at an average of ∼99.8% with uniform Zn deposition. Moreover, Zn–I batteries are constructed by using dissociative I – as the cathode and carbon felt–polyaniline as the conductive and adsorptive layer, exhibiting an average CE of 98.6% without capacity decay after 300 cycles. This work provides insights into the halogenated Zn 2+ solvation structure and offers a general electrolyte design strategy for achieving a highly reversible Zn metal anode and batteries.

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Crossref · 10.1021/jacs.2c06927

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Metadata

Authors
Zhang, Q., Ma, Y., Lu, Y., Ni, Y., Lin, L., Hao, Z., Yan, Z., Zhao, Q., & Chen, J.
Venue
Journal of the American Chemical Society
Published
2022-09-28
Volume
144
Issue
40
Pages
18435-18443
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W4297517002
Cited by
426
References
40
FWCI
23.62
Type
journal article
Language
en
Open access
closed

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