Enhancing Bidirectional Sulfur Conversion Through p–dOrbital Hybridization via Vacancy Engineering
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43933717" target="_blank" >RIV/60461373:22310/25:43933717 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/full/10.1002/EXP.20240362" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1002/EXP.20240362</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/EXP.20240362" target="_blank" >10.1002/EXP.20240362</a>
Alternative languages
Result language
angličtina
Original language name
Enhancing Bidirectional Sulfur Conversion Through p–dOrbital Hybridization via Vacancy Engineering
Original language description
Lithium–sulfur batteries (LSBs) have garnered significant concern as materials with high energy density for energy storage. Nevertheless, their severe shuttle effect and delayed redox kinetics limit their practical application. Herein, a strategy based on the regulation of oxygen vacancy concentration in CoWO4 has been proposed to accelerate polysulfide kinetics. Experiments and density functional theory calculations reveal that catalytic materials with the appropriate number of oxygen vacancies (CWO-M) have moderate adsorption energy and optimal catalytic capacity for polysulfides due to strong p–d orbital hybridization. More importantly, CWO-M not only accelerates the reduction of sulfur during discharge but also significantly accelerates the oxidation of Li2S during charging, showing a favorable bidirectional catalytic effect. Benefiting from these unique advantages, the CWO-M/S-based battery exhibits an excellent rate performance of 768 mAh g−1 at 2 C and a capacity retention of 91.1% after 100 cycles at 0.2 C. Stable cycling performance with a high capacity of nearly 4 mAh cm−2 was achieved even after 100 cycles at a high sulfur loading of 8.02 mg cm−2 and a low electrolyte/sulfur (E/S) ratio of 8 µL mg S−1. This work provides significant insights into bidirectional catalysts by modulating the oxygen vacancy concentration for application in LSBs.
Czech name
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Czech description
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Classification
Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
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OECD FORD branch
10700 - Other natural sciences
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
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
Exploration
ISSN
2766-8509
e-ISSN
2766-2098
Volume of the periodical
5
Issue of the periodical within the volume
6
Country of publishing house
CN - CHINA
Number of pages
11
Pages from-to
20240362
UT code for WoS article
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EID of the result in the Scopus database
2-s2.0-105014122418