About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Hybrid Organic-Inorganic Materials for Alternative Energy
|
| Presentation Title |
Silicalite Nanosheets with Surface Quaternary Ammonium Cations for Polymer Composite Anion Exchange Membranes |
| Author(s) |
Yukta Sharma, Chloe Constantinides, Devraj Singh, Junhang Dong |
| On-Site Speaker (Planned) |
Junhang Dong |
| Abstract Scope |
Anion exchange membranes (AEMs) are key to the AEM water electrolyzers (AEM-WEs), which have a major advantage of AEM-WEs over the acid WEs equipped with PEMs that is the use of non-precious metal electrodes in the former. However, the very few commercially available AEMs tested for AEM WE applications have inadequate chemical stability and mechanical strength, large resistance, and high costs. So far, the existing AEMs are almost exclusively made of anion exchange polymers (AEPs) with or without blending with nonionic polymers. The AEPs generally have issues of hydroxide ion attack on the carbon-backbone and the quaternary ammonium groups by intramolecular nucleophilic substitutions and Hoffman elimination leading to long-term instability. Here, we demonstrate the crystalline inorganic silicalite (pure-silica MFI zeolite) nanosheets (SNs) with surfaced quaternary ammonium cations (QAC) of the template molecules as a new type of anionic building block for high-performance inorganic-organic composite AEMs. |