Study the structure and electrochemical performance of BaTiO3/S electrode for magnesium-ion batteries

This paper is an attempt to design new cathodic materials for rechargeable magnesium batteries (RMBs) via combining sulfur (S) with BaTiO3 (BTO) by a sono-chemical method. X-ray diffraction (XRD) demonstrates that the introduction of sulfur within the framework of a tetragonal BTO results a small shift of the (101) plane of BTO from 31.44 degrees to 31.61 degrees. The electrochemical performance of the composite is analyzed by cyclic voltammetry (CV), electrochemical impedance spectroscopy and battery testing system. CV curves of BaTiO3 and BTO_S composite electrodes show capacitive behavior correspond to reactions at the cathode surface with magnesium ions. BaTiO3 and BTO_S composite electrodes display low diffusion coefficient of Mg2+ similar to 10-22 cm(2) s (1). Mg/BTO and Mg/(BTO_S) button cells deliver initial discharge capacity of 1.6/1.4 mAh g (1), at room temperature and 315/270 mA h g (1) at 55 degrees C, respectively. (c) 2020 Elsevier B.V. All rights reserved.

Automated summary

This paper attempts to design new cathodic materials for rechargeable magnesium batteries by combining sulfur with BaTiO3 using a sono-chemical method. The composite electrodes show capacitive behavior and low diffusion coefficient of Mg2+, demonstrating promising electrochemical performance for RMBs. The Mg/BTO and Mg/(BTO_S) button cells exhibit initial discharge capacities at room temperature and elevated temperature, showing potential for practical application.