A Metal-Organic Framework of Organic Vertices and Polyoxometalate Linkers as a Solid-State Electrolyte
A Metal-Organic Framework of Organic Vertices and Polyoxometalate Linkers as a Solid-State Electrolyte
复制标题
DOI：
10.1021/jacs.9b10418
复制
发表时间：
2019-11-06
影响因子：
15
通讯作者：
Yaghi, Omar M.
中科院分区：
文献类型：
--
作者：
Xu, Wentao;Pei, Xiaokun;Yaghi, Omar M.
通过亚胺缩合反应将双位氨基功能化的聚氧乙烯酸盐[N（C4 H9）（4）]（3）[MnMo 6 O 18 {（OCH 2）（3）CNH 2}（2）]与4-连接的四面体四（4-甲酰基苯基）甲烷结构单元连接，合成了一种新型的三维金属有机骨架（MOF）.通过单晶X-射线衍射解析了这种MOF的结构，称为MOF-688，并发现其为三重互穿金刚石基dia拓扑结构。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 ℃时为3.4 x 10（-4）S cm（-1）），高锂离子迁移数（t（Li+）= 0.87）和低金属锂界面电阻（353 Ω），这些特性使其非常适合作为固态电解质。实际上，使用M0 F-688作为固体电解质构造的原型锂金属电池可以在室温下以类似于0.2C的实际电流密度循环。
A new three-dimensional metal-organic framework (MOF) was synthesized by linking ditopic amino functionalized polyoxometalate [N(C4H9)(4)](3)[MnMo6O18{(OCH2)(3)CNH2}(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 x 10(-4) S cm(-1) at 20 degrees C), a high lithium ion transference number (t(Li+) = 0.87), and low interfacial resistance (353 Omega) 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 similar to 0.2 C.