Polybenzimidazolium based solid electrolytes for fuel cell applications

Title
Polybenzimidazolium based solid electrolytes for fuel cell applications
Authors
헨켄스마이어디억조형래김형준임태훈
Keywords
anion exchange membrane; fuel cell; polybenzimidazolium; platinum free fuel cell
Issue Date
2011-11
Publisher
international conference on advanced electromaterials 2011
Abstract
Polybenzimidazoles are amphoteric polymers, which can can be doped with phosphoric acid to show proton conductivity,[1] and with potassium hydroxide to show hydroxide conductivity.[2,3] For both systems, liquid water has to be avoided, to prevent the dopant from being leached out. A third alternative are peralkylated polybenzimidazoles, which show a positive charge fixed on the polymer backbone and an exchangeable anion. The synthesis of permethylated PBI iodide was published by Hu et al. in 1994.[4] In this presentation, we show that hydroxide exchanged PBI is a potential material for anionic exchange membrane fuel cell membranes. The positive charge is highly delocalized over the imidazolium system and the phenyl ring in position 2. First experiments revealed a hydroxide conductivity of 29 mS/cm at 26°C and 58 mS/cm at 60°C for a methylated meta-PBI with 65% imidazolium and 35% imidazole groups.[5]
URI
http://pubs.kist.re.kr/handle/201004/40838
Appears in Collections:
KIST Publication > Conference Paper
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE