Teaching an Old Dog New Tricks: Synthesis, Processing, and Application of Polybenzimidazole (PBI) Membranes
Source abstract
Abstract
A novel processing technique was developed in which gel polybenzimidazole (PBI) membranes, produced by the polyphosphoric acid (PPA) process, are converted into dense polymer films and re-doped in phosphoric acid. This process, termed the PPA+ process, provides a 5 times improvement in creep resistance due to a 2-fold increase in the solids content within the membrane. Remarkably, the dense p -PBIs re-doped in phosphoric acid also exhibit excellent ionic conductivities at high temperatures. Thus, the performance of such membranes in high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) is enhanced under various operating conditions and long lifetimes.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Fuel Cells and Related Materials · Microfluidic and Capillary Electrophoresis Applications · Hydraulic and Pneumatic Systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
Funding
South Carolina General Assembly
References (46)
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