Benzoxazole functionalization of poly(terphenyl piperidine) membranes for high-performance high temperature proton exchange membrane fuel cells.

Herein, we report benzoxazole-functionalized poly(terphenyl piperidine) membranes that integrate hydrogen-bond network engineering with frontier orbital regulation. The dual-heteroatom architecture simultaneously enhances proton transport, phosphoric acid retention, chemical durability, and mechanical robustness, providing an effective molecular design strategy for high-performance high-temperature proton exchange membranes for fuel cells.