Hydrogen Bond and Dipole-Dipole Interaction Enabling Ultrastable, Quick Responding, and Self-Healing Proton Exchange Membranes for Fuel Cells.

ABSTRACT: Proton exchange membranes (PEMs) are subject to mechanical degradation, such as microcracks and pinhole formation, under real-world fuel cell operating conditions, which leads to great issues in terms of device death and safety concerns. Therefore, PEMs with self-healing features are imperative but have rarely been used for proton exchange membrane fuel cells (PEMFCs). Here, a dimensionally stable and self-healing PEM is developed by tuning the hydrogen bond and dipole-dipole interactions between the mature perfluorinated sulfonic acid (PFSA) and a self-healing copolymer, which is specifically synthesized with hexafluorobutyl acrylate (HFBA) and acrylic acid (AA). This hexafluorobutyl acrylate-acrylic acid copolymer (HFBA-co-AA) is suggested as the key to improving the self-healing

SUBMITTER: Mo S 

PROVIDER: S-EPMC11191563 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature