Introduction of Co (Ni) substituents at the edges of MoS2 nanosheets to improve the efficiency of sodium-ion battery anodes

Introduction of Co (Ni) substituents at the edges of MoS2 nanosheets to improve the efficiency of sodium-ion battery anodes Научная публикация

Журнал

Materials Today Nano
ISSN: 2588-8420

Вых. Данные

Год: 2026, Том: 35, Номер статьи : 100899, Страниц : 14 DOI: 10.1016/j.mtnano.2026.100899

Ключевые слова

Nanostructured molybdenum disulfide; Cobalt doping; Nickel doping; EXAFS; DFT calculations; Sodium-ion battery

Авторы

Zaguzina Alena A. ¹ , Alekseev Victor A. ¹ , Fedorenko Anastasiya D. ¹ , Lisitsa Elena V. ¹ , Trubina Svetlana V. ¹ , Zvereva Valentina V. ¹ , Kriventsov Vladimir V. ² , Shubin Yury V. ¹ , Liu Tao ³ , Okotrub Alexander V. ¹ , Bulusheva Lyubov G. ¹

Организации

1	Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk, 630090, Russia
2	Synchrotron Radiation Facility – Siberian Circular Photon Source «SKIF» Boreskov Institute of Catalysis SB RAS, 1 pr. Nikolsky, r.p. Koltsovo, Novosibirsk, 630559, Russia
3	Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 68 Jincheng Street, Wuhan, 430078, PR China

Информация о финансировании (1)

Российский научный фонд

MoS2 nanomaterials with varying Co or Ni substituent contents were synthesized by rapid thermolysis of mixed aerogels of ammonium tetrathiomolybdate and cobalt or nickel acetate in an inert atmosphere. Electron microscopy studies of the samples revealed microdefects in the structure of the MoS2 platelets arising from gas evolution during decomposition of the acetate moiety. X-ray photoelectron spectroscopy data showed that Co and Ni are in the 2+ oxidation state, and their introduction into MoS2 lowers the Fermi level. Extended X-ray absorption fine structure spectroscopy indicated that both Co and Ni are coordinated by four sulfur atoms, consistent with the substitution of Mo atoms at the edges of the MoS2 nanosheets. Testing of samples as anodes for sodium-ion batteries (SIBs) demonstrated optimal performance for MoS2 with 1–2% Co (Ni) substitution. The reversible specific capacity of the best samples after 55 discharge/charge cycles was ∼500 mAh·g−1 at a current density of 0.1 A·g−1. Analysis of cyclic voltammetry curves measured after more than 60 cycles revealed peaks of redox reactions corresponding to the reversible intercalation of Na+ ions between MoS2 nanosheets. SIBs with Co-MoS2 or Ni-MoS2 anodes sustained a current density of 10 A·g−1, while the Co-doped sample retained an exceptional capacity of 150 mAh·g−1 after 1000 cycles. The superior rate performance of Co-MoS2 is attributed to the higher electron density near the Fermi level provided by the Co substituents, as confirmed by density functional theory calculations.

Zaguzina A.A. , Alekseev V.A. , Fedorenko A.D. , Lisitsa E.V. , Trubina S.V. , Zvereva V.V. , Kriventsov V.V. , Shubin Y.V. , Liu T. , Okotrub A.V. , Bulusheva L.G.
Introduction of Co (Ni) substituents at the edges of MoS2 nanosheets to improve the efficiency of sodium-ion battery anodes
Materials Today Nano. 2026. V.35. 100899 :1-14. DOI: 10.1016/j.mtnano.2026.100899 WOS Scopus

Поступила в редакцию:	19 мая 2026 г.
Принята к публикации:	26 июл. 2026 г.
Опубликована online:	27 июл. 2026 г.
Опубликована в печати:	3 авг. 2026 г.

≡ Web of science:	WOS:001840988700001
≡ Scopus:	2-s2.0-105046013886