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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Synthesis and characterization of polyvinylidene fluoride/magnesium bromide polymer electrolyte for magnesium battery application
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Synthesis and characterization of polyvinylidene fluoride/magnesium bromide polymer electrolyte for magnesium battery application

机译：聚偏二氟乙烯/镁溴化物聚合物电解质对镁电池施用的合成与表征

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摘要

The development of a magnesium ion conducting electrolyte is essential for designing rechargeable magnesium batteries. Herein, we report magnesium-ion conducting polymer electrolytes (PE) based on polyvinylidene fluoride (PVDF) and tetraethylene glycol dimethyl ether (TEGDME) with magnesium bromide salt processed by solution casting method. Fourier-transform infrared spectroscopy (FTIR) shows a composite between the polymer and the MgBr(2)salt forms. X-ray diffraction (XRD) data reveals that the broad reflections of the PVDF polymer are reduced with the addition of TEGDME and MgBr2, with scanning electron microscopy (SEM) illustrating changes in the morphology. The ionic conductivity and the relaxation time are found to be 1.2 x 10(-6)S cm(-1)and 5.7 x 10(-5)s(-1)at room temperature, respectively. This polymer electrolyte exhibits initial cycles with low overpotential, reversible Mg plating/stripping, and an excellent Mg-ion transfer number (t(Mg)(2+)) = 0.55. The assembled Mg/graphite and Mg/graphene nanoplatlets (GNP) prototype cells with this polymer electrolyte (PE) demonstrate the interaction of the magnesium ions with the electrodes.
机译：镁离子导电电解液的开发是设计可充电镁电池的关键。在此，我们报道了基于聚偏氟乙烯（PVDF）和四乙二醇二甲醚（TEGDME）的镁离子导电聚合物电解质（PE），以及溶液浇铸法处理的溴化镁盐。傅里叶变换红外光谱（FTIR）显示聚合物和MgBr（2）盐形式之间的复合物。X射线衍射（XRD）数据显示，添加TEGDME和MgBr2后，PVDF聚合物的宽反射降低，扫描电子显微镜（SEM）显示了形态的变化。室温下，离子电导率和弛豫时间分别为1.2x10（-6）scm（-1）和5.7x10（-5）S（-1）。这种聚合物电解质的初始循环具有低过电位、可逆的镀镁/脱镁，以及优良的镁离子转移数（t（Mg）（2+）=0.55。用这种聚合物电解质（PE）组装的镁/石墨和镁/石墨烯纳米板（GNP）原型电池展示了镁离子与电极的相互作用。

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