Synergistic protection of Si anode based on multi-dimensional graphitic carbon skeletons
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F22%3A10250001" target="_blank" >RIV/61989100:27710/22:10250001 - isvavai.cz</a>
Result on the web
<a href="https://www.webofscience.com/wos/woscc/full-record/WOS:000814492200003" target="_blank" >https://www.webofscience.com/wos/woscc/full-record/WOS:000814492200003</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s12274-022-4518-9" target="_blank" >10.1007/s12274-022-4518-9</a>
Alternative languages
Result language
angličtina
Original language name
Synergistic protection of Si anode based on multi-dimensional graphitic carbon skeletons
Original language description
Inspired by the natural corn structure, a Si@hollow graphene shell@graphene (Si@GS@G) anode material was prepared in which silicon nanoparticles were preliminarily anchored onto the surface of an elastic graphene shell and further constrained using graphene sheets. Hollow graphene oxide shells with abundant surficial hydrogen bonds, which were synthesized using a novel bottom-up method, were used as an intermediate material to anchor positively charged silicon nanoparticles via electrostatic attraction and achieve a rational spatial distribution. The inner hollow graphene shell anchorage and outer graphene constraint synergistically constituted a porous and robust conductive corn-like structure. The as-fabricated Si@GS@G anode afforded efficient electron and ion transport pathways and improved structural stability, thereby enhancing Li+ storage capability (505 mAh.g(-1) at 10 A.g(-1)) and extending the lifespan compared to the single hollow graphene shell or graphene sheet-protected Si anode (72% capacity retention after 500 cycles). The improved kinetics of the Si@GS@G anode were investigated using electro impedance spectroscopy, galvanostatic intermittent titration, and pseudocapacitance contribution rate analysis, and the structural evolution was analyzed using ex situ electron microscopy. This study proposes a novel hollow graphene oxide shell as an activated intermediate material for designing a porous electrode structure that facilitates an enhanced electrochemical 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
10400 - Chemical sciences
Result continuities
Project
<a href="/en/project/EF16_019%2F0000853" target="_blank" >EF16_019/0000853: Institute of Environmental Technology - Excellent Research</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nano Research
ISSN
1998-0124
e-ISSN
1998-0000
Volume of the periodical
2022
Issue of the periodical within the volume
JUN 2022
Country of publishing house
CN - CHINA
Number of pages
10
Pages from-to
nestrankovano
UT code for WoS article
000814492200003
EID of the result in the Scopus database
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