Influence of LiCl on the kinetics of Mg2+ insertion into TiO2 prepared by solid-state chemical reaction


Rakhymbay G. Avchukir K. Konysbay Y. Vacandio F. Jumanova R. Bakhytzhan Y. Abildina A. Argimbayeva A.
July 2024Springer Science and Business Media Deutschland GmbH

Journal of Solid State Electrochemistry
2024#28Issue 72151 - 2162 pp.

In this study, TiO2 was prepared via a solid-state chemical reaction and used as an anode for magnesium/lithium hybrid-ion batteries. The X-ray diffraction characterization of the synthesized titanium dioxide demonstrated that the material consists of 10% TiO2(B) and 90% anatase phases. Cyclic voltammetry and electrochemical impedance spectroscopy (EIS) measurements showed the lowest charge transfer resistance and the highest capacity for batteries assembled with 9 mM LiCl because of the activation effect of the Cl− anion. In general, TiO2 as anode material in Mg2+/Li+-ion mixed solutions demonstrated sluggish electrochemical kinetics and a rate constant obtained from the EIS data of 1.05 × 10−8 cm s−1. From the cyclic voltammetry measurements, it was found that the capacity of the magnesium-lithium battery has more pseudocapacitance characteristics than the mixed-controlled process, as in other studies. The investigated TiO2||0.05 M Mg(ClO4)2 + 0.009 M LiCl/AN||Mg hybrid-ion battery demonstrated a capacity of approximately 25 mAh g−1 after 50 cycles at 35 mA g−1 current.

Diffusion coefficient , Electrochemical impedance spectroscopy , Magnesium ion batteries , Solid-state chemical reaction , Titanium dioxide

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Center of Physical Chemical Methods of Research and Analysis, Al-Farabi Kazakh National University, Tole bi 96A, Almaty, 050012, Kazakhstan
Aix-Marseille University, CNRS, MADIREL, 13397, UMR 7246, cedex 20, Marseille, France

Center of Physical Chemical Methods of Research and Analysis
Aix-Marseille University

10 лет помогаем публиковать статьи Международный издатель

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