Anion conducting polymers based on ether linked polybenzimidazole (PBI-OO)
- Anion conducting polymers based on ether linked polybenzimidazole (PBI-OO)
- 헨켄스마이어디억; 조형래; Mateusz Brela; Artur Michalak; Alexander Dyck; Wiebke Germer; Ngoc My Hanh Duong; 장종현; 김형준; 남석우; 임태훈
- Polybenzimidazole; Anion exchange membrane; Anion conductivity; Imidazolium; DFT calculation
- Issue Date
- International journal of hydrogen energy
- VOL 39, NO 6, 2842-2853
- Anion conducting polymers are potentially interesting for fuel cells, electrochemical pumps, and dye sensitized solar cells. Ether-containing polybenzimidazoles (PBI-OO and PBI-OPO) were synthesized and turned into anion conducting polymers by methylation. The thermal stability was shown to depend on the polymer structure and degree of methylation (dom). Tensile strength and modulus decrease between 50% and 75% dom, but stay constant or slightly increase over 75% dom again. At 65 °C, hydroxide, iodide, chloride, carbonate and bicarbonate conductivities of 0.1, 0.6, 19, 20, 31 mS/cm were obtained, respectively. The low hydroxide conductivity is due to the formation of a C–O bond in position 2 of the imidazolium, which reduces the number of free ions and is known to lead to imidazolium ring opening and further degradation steps. The effect of introduction of phenoxy groups into the main chain on the charge distribution, especially on position 2 and the methyl groups (positive charge on the methyl groups decreases the thermal stability), as well as on the ion bonding was thoroughly investigated by DFT calculations and correlated with experimental data.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.