Robust Crystalline Hybrid Solid with Multiple Channels Showing High Anhydrous Proton Conductivity and a Wide Performance Temperature Range

Abstract

A proton conductor displaying high anhydrous proton conductivity (≈10(-2) S cm(-1)) and good performance over a broad temperature range is presented. This hybrid material is produced via doping HCl into open-framework chalcogenide(C2N2H10)(C2N2H9)2 Cu8 Sn3S12, and has cubopolyhedral cavities and multiple channels.

Facile Proton Transport in Ammonium Borosulfate—An Unhumidified Solid Acid Polyelectrolyte for Intermediate Temperatures

“…Development of proton conducting electrolyte materials that allow for hydrogen fuel cell operation at intermediate temperatures (i.e., 150–300 °C) can provide a number of advantages, including improved electrode kinetics, better electrode catalyst tolerance to poisoning, facile water and waste heat management, and new opportunities to develop better electrode electrocatalysts. [ 1–7 ] A number of material classes have been reported as potential intermediate‐temperature electrolytes, with superprotonic solid acids [ 8 ] (e.g., CsHSO 4 [ 9 ] and CsH 2 PO 4 [ 10 ] ) and organic polymers impregnated with inorganic acids (e.g., polybenzimidazole/H 3 PO 4 (PBI‐H 3 PO 4 ) [ 11 ] ) being most prominent, followed by coordination polymers (CPs) and metal–organic frameworks (MOFs), [ 12–18 ] and finally covalent organic frameworks (COFs). [ 19–23 ] Typically, solid acids display high proton conductivity above a superprotonic transition temperature occurring at >135 °C, [ 8 ] but are virtually insulating at lower temperatures, and are often susceptible to degradation under operating conditions.…”

Inorganic Acid‐Impregnated Covalent Organic Gels as High‐Performance Proton‐Conductive Materials at Subzero Temperatures

“…Notably, there are few reported materials possessing proton‐conductive properties at subzero temperatures . COGs not only represent a new type of solid state proton‐conductive material, but also show the state‐of‐the‐art conductivity at −40 °C compared to other porous materials impregnated with PA, hydrochloric acid, imidazole, hydroquinone, or cyclohexanol ( Figure ) . COG‐10P also shows excellent long‐term stability at low temperatures.…”

Dicarboxylate‐Induced Structural Diversity of Luminescent Zn(II)/Cd(II) Metal–Organic Frameworks Based on the 2,5‐Bis(4‐pyridyl)thiazolo[5,4‐d]thiazole Ligand

“…As a kind of distinctive ordered porous materials, metal‐organic frameworks (MOFs) have attracted considerable attention in the past decades. Apart from their intriguing structures, the interesting properties of MOFs impart various potential applications, such as gas adsorption and separation, hazardous substance adsorption and removal, proton conduction, chemical sensor, photoluminescence, and so on. Recently, photoluminescence properties of MOFs have become one of the research hotspots .…”