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Cationic Metallo-Polyelectrolytes for Robust Alkaline Anion-Exchange Membranes
Tianyu Zhu1, Shichao Xu1, Anisur Rahman1
1Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA.
Angewandte Chemie (International Ed. in English)
|January 2, 2018
Summary
New durable anion-exchange membranes (AEMs) were developed using cobaltocenium cations. These chemically inert and mechanically tough AEMs demonstrate excellent stability and high ion conductivity for advanced applications.
Area of Science:
- Materials Science
- Polymer Chemistry
Background:
- Developing durable anion-exchange membranes (AEMs) is crucial for electrochemical applications.
- Existing AEMs often face challenges with long-term stability in alkaline environments.
Purpose of the Study:
- To design and synthesize novel cationic metallo-polyelectrolytes for robust AEMs.
- To investigate the potential of cobaltocenium as an alkaline-stable cation in AEMs.
Main Methods:
- Utilized ring-opening metathesis polymerization (ROMP) of cobaltocenium-containing cyclooctene.
- Incorporated triazole as the sole linker group in the polymer backbone.
- Performed backbone hydrogenation to create a polyethylene-like framework.
Main Results:
- Successfully synthesized a new class of AEMs with a polyethylene-like structure.
- The AEMs demonstrated exceptional thermal, chemical, and mechanical stability.
- Achieved high ion conductivity due to the presence of cobaltocenium cations.
Conclusions:
- The developed AEMs offer a promising combination of durability and performance.
- Cobaltocenium-based metallo-polyelectrolytes represent a viable strategy for advanced AEM design.
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