One-step synthesis of vanadium-doped anatase mesocrystals for Li-ion battery anodes

O V Boytsova; O A Drozhzhin; D I Petukhov; A V Chumakova; A G Sobol; A N Beltyukov; A A Eliseev; A B Bosak

doi:10.1088/1361-6528/ac317a

One-step synthesis of vanadium-doped anatase mesocrystals for Li-ion battery anodes

Nanotechnology. 2021 Nov 12;33(5). doi: 10.1088/1361-6528/ac317a.

Authors

O V Boytsova^{1

2}, O A Drozhzhin³, D I Petukhov³, A V Chumakova⁴, A G Sobol¹, A N Beltyukov⁵, A A Eliseev¹, A B Bosak⁴

Affiliations

¹ Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskie Gory, Moscow, 119991, Russia.
² Kurnakov Institute of General and Inorganic Chemistry RAS, Leninskii Prosp. 31, Moscow, 119071, Russia.
³ Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, Moscow, 119991, Russia.
⁴ European Synchrotron Radiation Facility, 78 Avenue des Martyrs, 38000 Grenoble, France.
⁵ Udmurt Federal Research Center of the Ural Brunch of Russian Academy of Sciences (UdmFRCof UB RAS), Izhevsk, st.them. Tatiana Baramzina 34, 426067, Russia.

PMID: 34670202
DOI: 10.1088/1361-6528/ac317a

Abstract

Here we report a successful one-step synthesis of vanadium-doped anatase mesocrystals by reactive annealing of NH₄TiOF₃/PEG2000 mesocrystal precursors with NH₄VO₃. The formation solid solution Ti_1-xV_xO₂with vanadium content up tox = 25 at% inheriting the structure of mesocrystals is observed for the first time. The doping mechanism via vapor phase transport of vanadium is proposed. The Ti_1-xV_xO₂mesocrystals exhibit improved specific capacity of 175 mAh g^-1(compared to 150 mAh g^-1for pure anatase phase) and decreased potential gap between charge and discharge processes.

Keywords: TiO2 mesocrystals; anode material; doped anatase; solid solution; vanadium.