Polybenzimidazolium-Based Solid Electrolytes
- Polybenzimidazolium-Based Solid Electrolytes
- 헨켄스마이어디억; 김형준; 이혜진; 이동훈; 오인환; 홍성안; 남석우; 임태훈
- anionic exchange membranes; degradation; membranes; polybenzimidazole; polymer electrolyte fuel cells (PEFC)
- Issue Date
- Macromolecular materials and engineering
- VOL 296, NO 10, 899-908
- A series of methyl, benzyl, and mixed polybenzimidazolium halides was synthesised and
characterised by NMR spectroscopy. Membranes were formed and ion exchanged with
hydroxides. These membranes are of interest for use in potentially platinum-free anionic
exchange membrane fuel cells. Crosslinked membranes
were obtained by the addition of α,α'-dibromo-p-xylene
to the casting solution. The ion conductivity of membranes
was determined by impedance spectroscopy.
A hydroxide conductivity of 29 mSㆍcm-1 at 26 ℃ and
58 mSㆍcm-1 at 60 ℃ was obtained. The thermal and
hydrolytic stability was investigated and a pathway
for hydrolytic degradation proposed. Hydroxide ions
react at the 2 position, the intermediate carbinol opens
to the amine–amide, and further degrades under chain
scission to diamine and carboxylic acid.
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