Glue-assisted exfoliation of two-dimensional sulfur-rich niobium thiophosphate (Nb4P2S21) for sulfur-equivalent electrode study in lithium storage
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10497930" target="_blank" >RIV/00216208:11310/25:10497930 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/25:43931553
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=l6TOTK2SN-" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=l6TOTK2SN-</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d4na01060d" target="_blank" >10.1039/d4na01060d</a>
Alternative languages
Result language
angličtina
Original language name
Glue-assisted exfoliation of two-dimensional sulfur-rich niobium thiophosphate (Nb4P2S21) for sulfur-equivalent electrode study in lithium storage
Original language description
Two-dimensional (2D) layered thiophosphates have garnered attention for advanced battery technology due to their open ionic diffusion channels, high capacity, and unique catalytic properties. However, their potential in energy storage applications remains largely unexplored. In this study, we report a 2D transition metal thiophosphate (Nb4P2S21) with high sulfur content, synthesized via chemical vapor transport (CVT). The bulk material, exhibiting a layered quasi-one-dimensional (quasi-1D) structure, can be exfoliated into high-quality nanoplates using glue-assisted grinding. Density functional theory (DFT) calculations reveal a direct bandgap of 1.64 eV (HSE06 method) for Nb4P2S21, aligning with its near-infrared (NIR) photoluminescence at 755 nm. Despite an initial discharge capacity of 1500 mA h g(-1), the material shows low reversible capacity and rapid capacity decay at 0-2.6 V. In situ Raman confirms the formation of polysulfides during cycling. Given its high sulfur content, the material was evaluated at 0.5-2.6 V, 1.0-2.6 V, and 1.5-2.6 V to assess its sulfur-equivalent cathode performance. In carbonate-based electrolytes, electrochemical performance is hindered by polysulfide formation and side reactions, but switching to ether-based electrolytes improves initial reversible capacity and coulombic efficiency due to additional Li(x)S conversion above 2.2 V. EDS and TOF-SIMS analyses of cycled electrodes show a significant sulfur loss, worsening the polysulfide shuttle effect and leading to battery failure. Adapting strategies from lithium-sulfur batteries, such as polar host catalysts, could enhance the material's performance.
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
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
Nanoscale Advances
ISSN
2516-0230
e-ISSN
2516-0230
Volume of the periodical
7
Issue of the periodical within the volume
7
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
1860-1871
UT code for WoS article
001415328400001
EID of the result in the Scopus database
2-s2.0-105001209249