Abstract
How to optimize and regulate the distribution of phosphoric acid in matrix, and pursuing the improved electrochemical performance and service lifetime of high temperature proton exchange membrane (HT-PEMs) fuel cell are significant challenges. Herein, bifunctional poly (p-terphenyl-co-isatin piperidinium) copolymer with tethered phosphonic acid (t-PA) and intrinsic tertiary amine base groups are firstly prepared and investigated as HT-PEMs. The distinctive architecture of the copolymer provides a well-designed platform for rapid proton transport. Protons not only transports through the hydrogen bond network formed by the adsorbed free phosphoric acid (f-PA) anchored by the tertiary amine base groups, but also rely upon the proton channel constructed by the ionic cluster formed by the t-PA aggregation. Thorough the design of the structure, the bifunctional copolymers with lower PA uptake level (
Original language | English (US) |
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Journal | Energy and Environmental Materials |
DOIs | |
State | Published - Jan 1 2023 |
Externally published | Yes |