Transitioning to all-solid-state batteries and alternative technologies from liquid electrolyte counterparts is a matter of security and sustainability. In this scenario, magnesium is a strong candidate to replace lithium as a charge carrier because of its vast abundance, higher energy density, and suitability to be loaded in solid-state electrolytes, making batteries safer. This contribution reports a new solid electrolyte based on ZIF-8 modifications to improve its ionic conductivity. That material was obtained by the precipitation method and characterized through various spectroscopic and microscopic approaches. The ZIF-8 was modified by partially substituting the metal center, partially replacing Zn(II) with Cu(II), or the organic ligand, changing a fraction of 2-Methylimidazole with 2-Methylbenzimidazole. The impact of these modifications on the pristine ZIF-8 performance as an ionic conductor is tested through electrochemical impedance spectroscopy measurements, achieving a promising room-temperature ionic conductivity of 1 μS/cm. This work represents an effort to find a solid electrolyte synthesized under mild conditions with high conductivity to build a functional magnesium-ion battery prototype.

中文翻译：

---

通过 Cu (II) 掺杂和 mbIm 掺入骨架提高 ZIF-8 中的 Mg2+ 离子电导率

从液体电解质电池过渡到全固态电池和替代技术是一个安全和可持续性问题。在这种情况下，镁是取代锂作为电荷载体的有力候选者，因为它含量丰富、能量密度更高，并且适合装载在固态电解质中，使电池更安全。该贡献报告了一种基于 ZIF-8 修饰的新型固体电解质，以提高其离子电导率。该材料是通过沉淀法获得的，并通过各种光谱和显微方法进行表征。通过部分取代金属中心、用 Cu(II) 或有机配体部分取代 Zn(II)、用 2-甲基苯并咪唑改变一部分 2-甲基咪唑来修饰 ZIF-8。通过电化学阻抗谱测量测试了这些修饰对原始 ZIF-8 作为离子导体性能的影响，实现了令人鼓舞的 1 μS/cm 室温离子电导率。这项工作代表了寻找一种在温和条件下合成的具有高电导率的固体电解质的努力，以构建功能性镁离子电池原型。