Synergistic effect of sidewall holes and encapsulated phosphorus to improve lithium storage in single-walled carbon nanotubes | Sciact - CRIS-система Института катализа

Synergistic effect of sidewall holes and encapsulated phosphorus to improve lithium storage in single-walled carbon nanotubes Научная публикация

Журнал

Journal of Materials Chemistry A, Materials for Energy and Sustainability
ISSN: 2050-7488 , E-ISSN: 2050-7496

Вых. Данные

Год: 2025, Том: 13, Номер: 6, Страницы: 4634-4649 Страниц : 16 DOI: 10.1039/d4ta08568j

Ключевые слова

RAY PHOTOELECTRON-SPECTROSCOPY; RED PHOSPHORUS; SODIUM-ION; ELECTROCHEMICAL PERFORMANCE; RATE CAPABILITY; ANODE; OXIDATION; GRAPHENE; COMPOSITE; HYBRID

Авторы

Vorfolomeeva Anna A. ¹ , Fedoseeva Yuliya V. ¹ , Shlyakhova Elena V. ¹ , Kovalenko Konstantin A. ¹ , Makarova Anna A. ² , Gerasimov Evgeny Yu. ³ , Okotrub Alexander V. ¹ , Bulusheva Lyubov G. ¹

Организации

1	Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090, Novosibirsk, Russia
2	Physical Chemistry, Institute of Chemistry and Biochemistry, Free University of Berlin, 14195 Berlin, Germany
3	Boreskov Institute of Catalysis SB RAS, 5 Acad. Lavrentiev Ave., 630090, Novosibirsk, Russia

The paper presents experimental and theoretical evidence that filling holey single-walled carbon nanotubes (hSWCNTs) with phosphorus creates an anode material with increased lithium storage capacity. Tuball SWCNTs were purified of the catalyst, opened at the ends, and treated with hot mineral acids, followed by annealing in argon to reduce the sizes of the bundle and create holes in the walls. According to transmission electron microscopy, Raman scattering and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy studies, sidewall defects affect the phosphorus vapor condensation into short and disordered chains inside the nanotubes. The interaction of thermally evaporated lithium with empty and phosphorus-filled SWCNTs was studied using model X-ray photoelectron and NEXAFS spectroscopy experiments at a synchrotron radiation source. In the case of phosphorus-filled holey SWCNTs (P@hSWCNTs), a high dispersion of lithium along the nanotube walls and the formation of lithium phosphide inside were detected. Density functional theory calculations showed that the presence of encapsulated phosphorus reduces the energy barrier for lithium to penetrate through the hole into the nanotube. Electrochemical testing confirmed the synergistic effect of sidewall holes and encapsulated fibrous phosphorus in improving charge storage capacity in the lithium-ion battery. The P@hSWCNTs electrode delivered 946 mA h g−1 at a current density of 0.1 A g−1, which is 2 times higher than that of the analogue with intact walls, and demonstrated stable operation at 2 A g−1 for 100 discharge/charge cycles, achieving ∼100% Coulombic efficiency.

Vorfolomeeva A.A. , Fedoseeva Y.V. , Shlyakhova E.V. , Kovalenko K.A. , Makarova A.A. , Gerasimov E.Y. , Okotrub A.V. , Bulusheva L.G.
Synergistic effect of sidewall holes and encapsulated phosphorus to improve lithium storage in single-walled carbon nanotubes
Journal of Materials Chemistry A, Materials for Energy and Sustainability. 2025. V.13. N6. P.4634-4649. DOI: 10.1039/d4ta08568j WOS Scopus OpenAlex

Поступила в редакцию:	3 дек. 2024 г.
Принята к публикации:	2 янв. 2025 г.
Опубликована online:	13 янв. 2025 г.
Опубликована в печати:	14 февр. 2025 г.

Web of science:	WOS:001396828100001
Scopus:	2-s2.0-85215549275
OpenAlex:	W4406305309

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