High-entropy oxychloride increasing the stability of Li–sulfur batteries
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00572779" target="_blank" >RIV/61388955:_____/23:00572779 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0343347" target="_blank" >https://hdl.handle.net/11104/0343347</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/D3RA01496G" target="_blank" >10.1039/D3RA01496G</a>
Alternative languages
Result language
angličtina
Original language name
High-entropy oxychloride increasing the stability of Li–sulfur batteries
Original language description
A novel lithiated high-entropy oxychloride Li0.5(Zn0.25Mg0.25Co0.25Cu0.25)0.5Fe2O3.5Cl0.5 (LiHEOFeCl) with spinel structure belonging to the cubic Fd[3 with combining macron]m space group is synthesized by a mechanochemical–thermal route. Cyclic voltammetry measurement of the pristine LiHEOFeCl sample confirms its excellent electrochemical stability and the initial charge capacity of 648 mA h g−1. The reduction of LiHEOFeCl starts at ca. 1.5 V vs. Li+/Li, which is outside the electrochemical window of the Li–S batteries (1.7/2.9 V). The addition of the LiHEOFeCl material to the composite of carbon with sulfur results in improved long-term electrochemical cycling stability and increased charge capacity of this cathode material in Li–S batteries. The carbon/LiHEOFeCl/sulfur cathode provides a charge capacity of 530 mA h g−1 after 100 galvanostatic cycles, which represents ca. 33% increase as compared to the charge capacity of the blank carbon/sulfur composite cathode after 100 cycles. This considerable effect of the LiHEOFeCl material is assigned to its excellent structural and electrochemical stability within the potential window of 1.7 V/2.9 V vs. Li+/Li. In this potential region, our LiHEOFeCl has no inherent electrochemical activity. Hence, it acts solely as an electrocatalyst accelerating the redox reactions of polysulfides. This can be beneficial for the performance of Li–S batteries, as evidenced by reference experiments with TiO2 (P90).n
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
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA20-03564S" target="_blank" >GA20-03564S: New host materials and structures for advanced lithium-sulfur batteries</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
RSC Advances
ISSN
2046-2069
e-ISSN
2046-2069
Volume of the periodical
13
Issue of the periodical within the volume
25
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
17008-17016
UT code for WoS article
001002193600001
EID of the result in the Scopus database
2-s2.0-85162815942