Abstract 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° to 31.61°. 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+ ∼10-22 cm2 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 ˚C, respectively.

中文翻译：

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镁离子电池BaTiO3/S电极结构及电化学性能研究

摘要 本文试图通过声化学方法将硫（S）与 BaTiO3（BTO）结合，设计用于可充电镁电池（RMBs）的新型阴极材料。X 射线衍射 (XRD) 表明在四方 BTO 的框架内引入硫导致 BTO 的 (101) 平面从 31.44° 到 31.61° 的小位移。通过循环伏安法（CV）、电化学阻抗谱和电池测试系统分析了复合材料的电化学性能。BaTiO3 和 BTO/S 复合电极的 CV 曲线显示电容行为对应于阴极表面与镁离子的反应。BaTiO3 和 BTO/S 复合电极显示出较低的 Mg2+ 扩散系数 ∼10-22 cm2 s-1。Mg/BTO 和 Mg/(BTO/S) 纽扣电池提供 1.6/1.4 mAh g-1 的初始放电容量，