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Silicon-doped graphene nanoflakes with tunable structure: flexible pyrolytic synthesis and application for lithium-ion batteriesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 апреля 2022 г.
- Авторы: Stolbov D., Chernyak S., Ivanov A., Maslakov K., Tveritinova E., Ordomsky V., Ni M., Savilov S., Xia H.
- Журнал: Applied Surface Science
- Том: 592
- Год издания: 2022
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 153268
- DOI: 10.1016/j.apsusc.2022.153268
- Аннотация: 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.
- Добавил в систему: Черняк Сергей Александрович
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