Covalently Interlinked Graphene Sheets with Sulfur-Chains Enable Superior Lithium-Sulfur Battery Cathodes at Full-Mass Level
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F21%3A10247710" target="_blank" >RIV/61989100:27640/21:10247710 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15640/21:73607160
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/10.1002/adfm.202101326" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/adfm.202101326</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/adfm.202101326" target="_blank" >10.1002/adfm.202101326</a>
Alternative languages
Result language
angličtina
Original language name
Covalently Interlinked Graphene Sheets with Sulfur-Chains Enable Superior Lithium-Sulfur Battery Cathodes at Full-Mass Level
Original language description
Sulfur represents a low-cost, sustainable, and high theoretical capacity cathode material for lithium-sulfur batteries, which can meet the growing demand in portable power sources, such as in electric vehicles and mobile information technologies. However, the shuttling effect of the formed lithium polysulfides, as well as their low conductivity, compromise the electrochemical performance of lithium-sulfur cells. To tackle this challenge, a so far unexplored cathode, composed of sulfur covalently bonded directly on graphene is developed. This is achieved by leveraging the nucleophilicity of polysulfide chains, which react readily with the electrophilic centers in fluorographene, as experimental and theoretical data unveil. The reaction leads to the formation of carbon-sulfur covalent bonds and a particularly high sulfur content of 80 mass%. Owing to these features, the developed cathode exhibits excellent performance with only 5 mass% of conductive carbon additive, delivering very high full-cathode-mass capacities and rate capability, combined with superior cycling stability. In combination with a fluorinated ether as electrolyte additive, the capacity persists at ALMOST EQUAL TO700 mAh gMINUS SIGN 1 after 100 cycles at 0.1 C, and at ALMOST EQUAL TO644 mAh gMINUS SIGN 1 after 250 cycles at 0.2 C, keeping ALMOST EQUAL TO470 mAh gMINUS SIGN 1 even after 500 cycles. (C) 2021 Wiley-VCH GmbH
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10300 - Physical sciences
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
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Advanced Functional Materials
ISSN
1616-301X
e-ISSN
—
Volume of the periodical
31
Issue of the periodical within the volume
30
Country of publishing house
DE - GERMANY
Number of pages
10
Pages from-to
2101326
UT code for WoS article
000640561600001
EID of the result in the Scopus database
2-s2.0-85104356693