Six-electron-conversion selenium cathodes stabilized by dead-selenium revitalizer for aqueous zinc batteries
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43932219" target="_blank" >RIV/60461373:22310/25:43932219 - isvavai.cz</a>
Result on the web
<a href="https://www.nature.com/articles/s41467-025-58859-3" target="_blank" >https://www.nature.com/articles/s41467-025-58859-3</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41467-025-58859-3" target="_blank" >10.1038/s41467-025-58859-3</a>
Alternative languages
Result language
angličtina
Original language name
Six-electron-conversion selenium cathodes stabilized by dead-selenium revitalizer for aqueous zinc batteries
Original language description
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 <-> SeCl4 reaction, with Br-/Brn- redox couple effectively stabilizes the Zn | |Se cell. This Se conversion, initiated in a ZnCl2-based hydrogel electrolyte, presents rapid capacity decay (from 1937.3 to 394.1 mAh gSe-1 after only 50 cycles at 0.5 A gSe-1) primarily due to the dissolution of SeCl4 and its subsequent migration to the Zn anode, resulting in dead Se passivation. To address this, we incorporate the Br-/Brn- 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 gSe-1 after 50 cycles. Moreover, the Zn | |Se cell exhibits a specific capacity of 2077.6 mAh gSe-1 and specific energy of 404.2 Wh kg-1 based on the overall cell reaction.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nature Communications
ISSN
2041-1723
e-ISSN
2041-1723
Volume of the periodical
16
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
nestránkováno
UT code for WoS article
001471041700003
EID of the result in the Scopus database
2-s2.0-105003138891