Synergistic protection of Si anode based on multi-dimensional graphitic carbon skeletons

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Synergistic protection of Si anode based on multi-dimensional graphitic carbon skeletons

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Synergistic protection of Si anode based on multi-dimensional graphitic carbon skeletons

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10400 - Chemical sciences

Projekt

<a href="/cs/project/EF16_019%2F0000853" target="_blank" >EF16_019/0000853: Institut environmentálních technologií - excelentní výzkum</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nano Research

ISSN

1998-0124

e-ISSN

1998-0000

Svazek periodika

2022

Číslo periodika v rámci svazku

JUN 2022

Stát vydavatele periodika

CN - Čínská lidová republika

Počet stran výsledku

10

Strana od-do

nestrankovano

Kód UT WoS článku

000814492200003

EID výsledku v databázi Scopus

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