| Autor: |
Clemens AL; Materials Engineering Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA., Jayathilake BS; Materials Science Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA., Karnes JJ; Materials Engineering Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA., Schwartz JJ; Materials Engineering Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA., Baker SE; Materials Science Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA., Duoss EB; Materials Engineering Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA., Oakdale JS; Materials Science Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA. |
| Abstrakt: |
Alkaline anion exchange membranes (AAEMs) are an enabling component for next-generation electrochemical devices, including alkaline fuel cells, water and CO 2 electrolyzers, and flow batteries. While commercial systems, notably fuel cells, have traditionally relied on proton-exchange membranes, hydroxide-ion conducting AAEMs hold promise as a method to reduce cost-per-device by enabling the use of non-platinum group electrodes and cell components. AAEMs have undergone significant material development over the past two decades; however, challenges remain in the areas of durability, water management, high temperature performance, and selectivity. In this review, we survey crosslinking as a tool capable of tuning AAEM properties. While crosslinking implementations vary, they generally result in reduced water uptake and increased transport selectivity and alkaline stability. We survey synthetic methodologies for incorporating crosslinks during AAEM fabrication and highlight necessary precautions for each approach. |
