The enhancement of Li-ion conductivity in 2D metalloid organic frameworks nodal element substitution.

The development of solid-state electrolytes has become crucial for promoting the safety and performance of lithium-ion batteries. Herein, the substitution of nodal elements from Si to Ge significantly improved the lithium ionic conductivity in 2D metalloid organic frameworks, resulting in an enhancement of approximately one order of magnitude.

Versatile Platform of Ion Conducting 2D Anionic Germanate Covalent Organic Frameworks with Potential for Capturing Toxic Acidic Gases.

Anionic covalent organic framework is an emerging class of functional materials in which included ionic species of the opposite charges play an important role in the ion conduction and selective gas adsorption. Herein, we reported a facile method to construct a series of germanate-based anionic COFs (Ge-COFs) by reticulating dianionic hexa-coordinated GeO nodes with anthracene building blocks adopting a topology in an extended 2D framework. A systematic change of pore properties in Ge-COFs was observed through the incorporation of three different alkali metal cations: Li, Na, and K.

Enhanced Proton Conductivity of Imidazole-Doped Thiophene-Based Covalent Organic Frameworks via Subtle Hydrogen Bonding Modulation.

Anhydrous proton-conductive materials have attracted great attention in recent years. Doping imidazole as a proton carrier in porous materials, especially pure organic crystalline covalent organic frameworks (COFs), is a promising solution. However, the influence of the hydrogen donor ability of imine functional groups in COFs on the proton conduction has largely been unexplored.

Crystalline Anionic Germanate Covalent Organic Framework for High CO Selectivity and Fast Li Ion Conduction.

The metalloid-centered covalent organic framework has attracted great interest from both its structure and application. Heavier elements have seldomly been incorporated in the covalent organic frameworks, even if they exhibit special structural features and properties. Herein, we reported the first crystalline germanate covalent organic framework with hexacoordinated germanate linked by an anthracene linker.