Titre :

Silicon-doped graphene nanoflakes with tunable structure: Flexible pyrolytic synthesis and application for lithium-ion batteries

Auteur(s) :

Stolbov, Dmitrii [Auteur]
Chernyak, Sergei [Auteur]
Ivanov, Anton [Auteur]
Maslakov, Konstantin [Auteur]
Tveritinova, Evgeniya [Auteur]
Ordomsky, Vitaly [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Ni, Mingzhu [Auteur]
Savilov, Serguei [Auteur]
Xia, Hui [Auteur]

Titre de la revue :

Applied Surface Science

Numéro :

592

Pagination :

153268

Éditeur :

Elsevier

Date de publication :

2022-08-01

ISSN :

0169-4332

Mot(s)-clé(s) en anglais :

Graphene nanoflakes
Silicon-doped carbon
Template pyrolysis
Lithium-ion batteries

Discipline(s) HAL :

Chimie
Chimie/Catalyse

Résumé en anglais : [en]

Incorporation of heteroatoms into graphene layers is a powerful way of tuning their surface and structure. We developed for the first time a tunable approach for the synthesis of Si-doped jellyfish-like graphene nanoflakes ...
Lire la suite >Incorporation of heteroatoms into graphene layers is a powerful way of tuning their surface and structure. We developed for the first time a tunable approach for the synthesis of Si-doped jellyfish-like graphene nanoflakes (Si-GNFs) via template pyrolysis. The synthesis parameters were shown to affect the doping level, silicon bonding type, heteroatom localization in Si-GNFs, and the defectiveness of the synthesized material. The silicon incorporation into GNF layers creates acidic and basic Lewis sites as it was tested in the butanol-2 conversion over Si-GNF. Doping of GNFs with Si significantly boosted the specific capacity of GNF-based electrode of the lithium-ion battery up to 600 mAh*g−1. The capacity enhancement was ascribed to the redistribution of the electron density due to the difference in electronegativity between C and Si, corrugation of the graphene layers by heteroatoms, and reduction of silicon species. The synthesis conditions were shown to strongly affect the capacity and cycle stability of the electrode.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Catalyse pour l’énergie et la synthèse de molécules plateforme (CEMOP)

Date de dépôt :

2023-11-08T08:09:28Z
2023-11-24T10:26:08Z