Chemically stable anion exchange membrane with 2,6-protected pendant pyridinium cation for alkaline fuel cell

Degradation of Anion Exchange Membranes by Cation Elimination: Impact on Water Uptake, Nanostructure, and Ionic Mobility

“…Nucleophilic substitution ( S N 2) and methyl substitution ( S N 2), , Hofmann-β -elimination ( E 2), , backbone cleavage, , and intermediate N-ylide formation in the presence of oxygen, are some of the commonly occurring degradation paths reported in experimental studies. Except for backbone cleavage, these degradation pathways result in a direct loss of ion exchange capacity (IEC), which impacts key properties of the membrane such as ionic conductivity, water diffusivity, water uptake (%WU), and water content (λ, number of water molecules per cationic site) thus limiting the durability of AEMFCs. ,− …”

Modification of Hydrophobic Diacid Units for Enhanced Poly(crown ether) Anion-Exchange Membrane Performance

“…Polymer electrolyte fuel cell (PEFC) technology is considered as an environment-friendly energy conversion device to address fuel resource depletion and global warming due to its near-zero pollution and excellent energy conversion efficiency. – PEFCs can be classified as proton exchange membrane fuel cells (PEMFCs), which function in acidic conditions, and anion-exchange membrane fuel cells (AEMFCs), which operate in an alkali environment. , PEMFCs have been applied in some fields due to their good fuel cell performances. Nevertheless, the high cost associated with the utilization of perfluorinated membranes and Pt-based catalysts hinders the large-scale commercial application of PEMFCs .…”

One-Pot Synthesis of Quaternary Pyridinium-Type Cationic-Based Porous Organic Frameworks: Enhanced Poly(ethylene oxide) Composite Polymer Electrolytes for All-Solid-State Li–S Batteries

“…Compared with a neutral framework POF, a cationic POF has higher polarizability, , which can effectively shield Coulombic interaction, destroy the ion pairs or even ionic aggregates between lithium salts, obtain higher concentration of free lithium ions, and improve the ionic conductivity of SPEs (at 353 and 423 K, the Li + conductivity can reach 4.64 × 10 –4 and 4.04 × 10 –3 S cm –1 , respectively) . In addition, quaternary pyridine-type cationic-based POFs not only have higher polarizability through the characteristic of skeleton charge but also have a stable structure and simple preparation, and these unique characteristics give it great potential in the field of ion conduction. − …”