A Metal-Organic Framework of Organic Vertices and Polyoxometalate Linkers as a Solid-State Electrolyte.

作者：Wentao Xu, Xiaokun Pei, Christian S. Diercks, Hao Lyu, Zhe Ji, O. Yaghi · 发表于：Journal of the American Chemical Society · 年份：2019 · DOI：10.1021/jacs.9b10418 · 被引用次数：246 · 研究领域：Chemistry、Medicine

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.