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US 2021/0280883 A1Published application
Proton-Conducting PBI Membrane Processing with Enhanced Performance and Durability
AssigneeUniversity of South Carolina
InventorsLaura A. Murdock, Fei Huang, Brian C. Benicewicz
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Abstract
The current disclosure teaches one to achieve PBI membranes with high ionic conductivity and low mechanical creep for the first time. This is in contrast to previous teachings of PBI membrane fabrication methods, which yield PBIs with either high ionic conductivity and high mechanical creep or low ionic conductivity and low mechanical creep. The membranes produced according to the disclosed process provide doped membranes for applications in fuel cells and electrolysis devices such as electrochemical separation devices.
Claims16
A process for making polybenzimidazole (PBI) films comprising:
- forming a gel PBI membrane via a PPA process;
- rinsing the gel PBI membrane;
- restraining the PBI membrane in at least an X-Y plane direction;
- drying the rinsed gel PBI membrane;
- and
- immersing the dried film into an inorganic or organic acid bath.
3 more elements
Dependencies are inferred from the claim text.