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@ARTICLE{Du:630615,
author = {Du, Jingwei and Zhang, Jiaxu and Chu, Xingyuan and Xu, Hao
and Zhao, Yirong and Löffler, Markus and Wang, Gang and Li,
Dongqi and Guo, Quanquan and Morag, Ahiud and Du, Jie and
Zou, Jianxin and Mikhailova, Daria and Mazánek, Vlastimil
and Sofer, Zdeněk and Feng, Xinliang and Yu, Minghao},
title = {{S}ix-electron-conversion selenium cathodes stabilized by
dead-selenium revitalizer for aqueous zinc batteries},
journal = {Nature Communications},
volume = {16},
number = {1},
issn = {2041-1723},
address = {[London]},
publisher = {Springer Nature},
reportid = {PUBDB-2025-01893},
pages = {3707},
year = {2025},
abstract = {Aqueous zinc batteries are attractive for large-scale
energy storage due to their inherent safety and
sustainability. However, their widespread application has
been constrained by limited energy density, underscoring a
high demand of advanced cathodes with large capacity and
high redox potential. Here, we report a reversible
high-capacity six-electron-conversion Se cathode undergoing
a ZnSe↔Se↔SeCl$_4$ reaction, with Br$^−$/Br$_n$$^−$
redox couple effectively stabilizes the Zn | |Se cell.
This Se conversion, initiated in a ZnCl$_2$-based hydrogel
electrolyte, presents rapid capacity decay (from 1937.3 to
394.1 mAh g$_{Se}$$^{−1}$ after only 50 cycles at
0.5 A g$_{Se}$$^{−1}$) primarily due to the dissolution
of SeCl$_4$ and its subsequent migration to the Zn anode,
resulting in dead Se passivation. To address this, we
incorporate the Br$^−$/Br$_n$$^−$ redox couple into the
Zn | |Se cell by introducing bromide salt as an
electrolyte additive. The generated Brn− species acts as a
dead-Se revitalizer by reacting with Se passivation on the
Zn anode and regenerating active Se for the cathode
reaction. Consequently, the cycling stability of the
Zn | |Se cell is improved, maintaining 1246.8 mAh
g$_{Se}$$^{−1}$ after 50 cycles. Moreover, the
Zn | |Se cell exhibits a specific capacity of
2077.6 mAh g$_{Se}$$^{−1}$ and specific energy of
404.2 Wh kg$^{−1}$ based on the overall cell
reaction.},
cin = {DOOR ; HAS-User},
ddc = {500},
cid = {I:(DE-H253)HAS-User-20120731},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3) / DFG project
G:(GEPRIS)417590517 - SFB 1415: Chemie der synthetischen
zweidimensionalen Materialien (417590517) / LIGHT-CAP -
MULTI-ELECTRON PROCESSES FOR LIGHT DRIVEN ELECTRODES AND
ELECTROLYTES IN CONVERSION AND STORAGE OF SOLAR ENERGY
(101017821)},
pid = {G:(DE-HGF)POF4-6G3 / G:(GEPRIS)417590517 /
G:(EU-Grant)101017821},
experiment = {EXP:(DE-H253)P-P65-20150101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:40251148},
doi = {10.1038/s41467-025-58859-3},
url = {https://bib-pubdb1.desy.de/record/630615},
}