A new three-dimensional metal-organic framework (MOF) was synthesized by linking ditopic amino functionalized polyoxometalate [N(C4H9)4]3[MnMo6O18{(OCH2)3CNH2}2] with 4-connected tetrahedral tetrakis(4-formylphenyl)methane building units through imine condensation. The structure of this MOF, termed MOF-688, was solved by single crystal X-ray diffraction and found to be triply interpenetrated diamond-based dia topology. Tetrabutylammonium cations fill the pores and balance the charge of the anionic framework. They can be exchanged with lithium ions to give high ionic conductivity (3.4 × 10-4 S cm-1 at 20 °C), high lithium ion transference number (tLi+ = 0.87), and low interfacial resistance (353 Ω) against metallic lithium - properties that make it ideally suited as a solid-state electrolyte. Indeed, a prototype lithium metal battery constructed using MOF-688 as the solid electrolyte can be cycled at room temperature with a practical current density of ~0.2 C.

中文翻译：

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作为固态电解质的有机顶点和多金属氧酸盐接头的金属-有机框架

通过将双位氨基官能化多金属氧酸盐 [N(C4H9)4]3[MnMo6O18{(OCH2)3CNH2}2] 与 4-连接的四面体四（4-甲酰基苯基）甲烷连接，合成了一种新的三维金属有机骨架（MOF）通过亚胺缩合构建单元。这种称为 MOF-688 的 MOF 的结构通过单晶 X 射线衍射解析，发现是三重互穿的基于金刚石的直径拓扑。四丁基铵阳离子填充孔隙并平衡阴离子骨架的电荷。它们可以与锂离子交换以提供高离子电导率（20°C 时为 3.4 × 10-4 S cm-1）、高锂离子转移数（tLi+ = 0.87）和对金属锂的低界面电阻（353 Ω） - 使其非常适合作为固态电解质的特性。确实，