Verfahren zur Dotierung von Dichten Filmen und Porösen Membranen auf Polybenzimidazolbasis mit Protonenleitenden Elektrolyten auf Basis von Konzentrierten Brönsted-Säure/benzimidazol-Mischungen
Anmelder: Institute of Polymers Bulgarian Academy of Sciences, Institute of Electrochemistry and Energy Systems at Bulgarian Academy of Sciences 🇧🇬
Details
- Veröffentlichungs-Nr.
- EP4560746
- Aktenzeichen
- EP23020520
- Anmeldetag
- 24. November 2023
- Veröffentlichung
- 28. Mai 2025
- Rechtsraum
- EP
- IPC
- H01M8/103C25B13/08H01M8/1072H01M8/18C25B1/04// H01M8/10
Abstract
The patent application relates to a method for efficient doping of dense dry films and porous membranes based on polybenzimidazoles and their composites with a mixed proton-conducting electrolyte, wherein generally it includes the following steps: a) obtaining a proton-conducting electrolyte, representing a mixed electrolyte of concentrated mineral or organic Brønsted acid or a mixture of acids by directly dissolving an aromatic heterocyclic compound from the group of benzimidazoles or its derivatives in a concentration range of 0.3-35 wt. % in which an acid-base reaction occurs with in situ formation of a corresponding benzimidazole salt or by dissolving an ex situ synthesized benzimidazole salt of the corresponding dopant acid; b) providing a dense, dry film, porous membrane or composite one based on a polybenzimidazole (PBI) type matrix, c) immersing and swelling a polybenzimidazole-based film, porous membrane or composites thereof b) in a bath containing the mixed acid-salt electrolyte of a) in a temperature range of 20-120°C, for a residence time of at least 3 minutes to one day during which doping of the material occurs and obtaining ion-solvating type proton-conducting polybenzimidazole membrane; and d) conditioning of mixed-electrolyte-doped polybenzimidazole membranes in which subsequent equilibrium air moisture absorption occurs. The method according to the invention provides stable, mechanically robust self-supporting membranes with high proton conductivity and good thermal/chemical stability.
Anmelder
- Firmen
- Institute of Polymers Bulgarian Academy of Sciences
Institute of Electrochemistry and Energy Systems at Bulgarian Academy of Sciences - Land
- 🇧🇬 Bulgarien
J. Varbanov & Partners ist ein 1993 gegründetes Patent- und Markenbüro in Sofia und zählt zu den ersten privaten Kanzleien Bulgariens im gewerblichen Rechtsschutz, mit Beratung zu Patenten, Marken und Geschmacksmustern in Bulgarien und der EU.