Ultrafine FeS2 nanocrystals/porous nitrogen-doped carbon hybrid nanospheres encapsulated in three-dimensional graphene for simultaneous efficient lithium and sodium ion storage
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10420699" target="_blank" >RIV/00216208:11310/19:10420699 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=i0yL9HPFM7" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=i0yL9HPFM7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c9ta10184e" target="_blank" >10.1039/c9ta10184e</a>
Alternative languages
Result language
angličtina
Original language name
Ultrafine FeS2 nanocrystals/porous nitrogen-doped carbon hybrid nanospheres encapsulated in three-dimensional graphene for simultaneous efficient lithium and sodium ion storage
Original language description
Exploring advanced electrode materials with simultaneous efficient lithium and sodium ion storage is highly desired but remains a considerable challenge mainly due to the significant difference of lithium and sodium ion sizes. Transition metal sulfides (TMSs) have shown great potential in lithium/sodium ion batteries (LIBs/SIBs), however, they still face the critical issues of poor electrical conductivity, sluggish ion diffusion, huge volume expansion and agglomeration of highly reactive nano-metal products. Herein, we deliberately design a multiple-scale nanostructured and flexible anode by a facile one-step sulfidation strategy, in which ultrafine metal sulfide nanocrystals are isolated and protected by porous nitrogen-doped carbon nanospheres (PNC) and then encapsulated into three-dimensional graphene microsheets (3DG). It can effectively eliminate the above issues of TMSs, which makes them a very promising candidate for both LIBs and SIBs for the first time. Thus, the resultant FeS2/PNC@3DG anode delivers ultrahigh reversible capacities (1208 mA h g(-1) for LIBs and 597 mA h g(-1) for SIBs at 0.2 A g(-1)), excellent rate capabilities (829 mA h g(-1) for LIBs and 316 mA h g(-1) for SIBs at 5 A g(-1)), and superior long-term cycling performance with a capacity retention of 94.2% for LIBs and 85.2% for SIBs, which has rarely been achieved in previously reported various anodes. Moreover, its highly efficient Li+/Na+ storage mechanisms are systematically investigated by reaction kinetics analysis and density functional theory calculations, which further provide important insights into the development of high-performance energy storage materials.
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
—
Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Materials Chemistry A
ISSN
2050-7488
e-ISSN
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Volume of the periodical
7
Issue of the periodical within the volume
46
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
26342-26350
UT code for WoS article
000501213600013
EID of the result in the Scopus database
2-s2.0-85075828175