一种用于可充电镁电池的稳定、无腐蚀性的全氟频哪醇硼酸镁电解质
A Stable, Non-Corrosive Perfluorinated Pinacolatoborate Mg Electrolyte for Rechargeable Mg Batteries.
作者信息
Luo Jian, Bi Yujing, Zhang Liping, Zhang Xiaoyin, Liu Tianbiao Leo
机构信息
Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT, USA.
出版信息
Angew Chem Int Ed Engl. 2019 May 20;58(21):6967-6971. doi: 10.1002/anie.201902009. Epub 2019 Mar 22.
Abstract
Mg batteries are a promising energy storage system because of the physicochemical merits of Mg as an anode material. However, the lack of electrochemically and chemically stable Mg electrolytes impedes the development of Mg batteries. In this study, a newly designed chloride-free Mg perfluorinated pinacolatoborate, Mg[B(O C (CF ) ) ] (abbreviated as Mg-FPB), was synthesized by a convenient method from commercially available reagents and fully characterized. The Mg-FPB electrolyte delivered outstanding electrochemical performance, specifically, 95 % Coulombic efficiency and 197 mV overpotential, enabling reversible Mg deposition, and an anodic stability of up to 4.0 V vs. Mg. The Mg-FPB electrolyte was applied to assemble a high voltage, rechargeable Mg/MnO battery with a discharge capacity of 150 mAh g .
摘要
镁电池因其作为负极材料的物理化学优点而成为一种很有前景的储能系统。然而，缺乏电化学和化学稳定的镁电解质阻碍了镁电池的发展。在本研究中，通过一种简便的方法由市售试剂合成了一种新设计的无氯全氟频哪醇硼酸镁Mg[B(OC(CF₃)₂)₂]（简称为Mg-FPB），并对其进行了全面表征。Mg-FPB电解质展现出优异的电化学性能，具体而言，库仑效率为95%，过电位为197 mV，能够实现镁的可逆沉积，相对于镁的阳极稳定性高达4.0 V。Mg-FPB电解质被用于组装一种高压可充电镁/二氧化锰电池，其放电容量为150 mAh g⁻¹。
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