AI Article Synopsis
- This review discusses the use of composite anion exchange membranes (AEM) made with an organo-silica network using sol-gel chemistry, focusing on their applications in diffusion dialysis, fuel cells, redox flow batteries, and electrodialysis.
- It highlights that many of the recent AEM developments, particularly in the last 15 years, utilize poly (vinylalcohol) (PVA) or poly (2,6-dimethyl-1,4-phenylene oxide) (PPO) as their polymer matrix, emphasizing the need for high permselectivity and ionic conductivity.
- The article also addresses the ongoing challenge of alkaline stability for AEM in fuel cells and suggests future research directions for improving
Article Abstract
This short review summarizes the literature on composite anion exchange membranes (AEM) containing an organo-silica network formed by sol-gel chemistry. The article covers AEM for diffusion dialysis (DD), for electrochemical energy technologies including fuel cells and redox flow batteries, and for electrodialysis. By applying a vast variety of organically modified silica compounds (ORMOSIL), many composite AEM reported in the last 15 years are based on poly (vinylalcohol) (PVA) or poly (2,6-dimethyl-1,4-phenylene oxide) (PPO) used as polymer matrix. The most stringent requirements are high permselectivity and water flux for DD membranes, while high ionic conductivity is essential for electrochemical applications. Furthermore, the alkaline stability of AEM for fuel cell applications remains a challenging problem that is not yet solved. Possible future topics of investigation on composite AEM containing an organo-silica network are also discussed.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8200225 | PMC |
| http://dx.doi.org/10.3390/polym13111874 | DOI Listing |
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