Oligomeric chain extender-derived anion conducting membrane materials with poly(-phenylene)-based architecture for fuel cells and water electrolyzers

Herein, we report a series of oligomeric chain extender-derived AEMs (QPP- b -PSK- w -TMA) with increased molecular weights. The QPP- b -PSK- w -TMA membranes showed excellent polymer main-chain stability as well as outstanding hydroxide conductivity, 129 mS cm −1 at 80 °C, which is 1.6 times higher...

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Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2022-05, Vol.1 (17), p.9693-976
Main Authors: Cha, Min Suc, Park, Ji Eun, Kim, Sungjun, Shin, Sang-Hun, Yang, Seok Hwan, Lee, Seung Jae, Kim, Tae-Ho, Yu, Duk Man, So, Soonyong, Oh, Kang Min, Sung, Yung-Eun, Cho, Yong-Hun, Lee, Jang Yong
Format: Article
Language:English
Subjects:
Catalysts
Electrolytic cells
Fuel cells
Fuel technology
Iron compounds
Membranes
Nickel compounds
Platinum
Platinum metals
Polymers
Rheological properties
Thermal stability
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Summary:Herein, we report a series of oligomeric chain extender-derived AEMs (QPP- b -PSK- w -TMA) with increased molecular weights. The QPP- b -PSK- w -TMA membranes showed excellent polymer main-chain stability as well as outstanding hydroxide conductivity, 129 mS cm −1 at 80 °C, which is 1.6 times higher than that of FAA-3, moreover, the QPP- b -PSK- w -TMA also exhibited remarkable thermally stable rheological properties originating from the main chain structure. Using the QPP- b -PSK-3.5-TMA membrane, we demonstrated that a high performance low platinum group metal (PGM)-loaded AEMFC showed a high specific power of 4.9 W mg PGM −1 , which is the highest value among those reported for the state-of-the-art AEMFCs with PGM-based electrodes. In addition, an AEMWE with the QPP- b -PSK-3.5-TMA membrane showed a high performance of 4.0 A cm −2 at 1.9 V under 90 °C and durable performance with a low degradation rate of 1.2 mV h −1 for 100 h despite the use of the NiFe catalyst under 80 °C. A series of oligomeric chain extender-derived AEMs (QPP- b -PSK- w -TMA) are reported for AEMFC and AEMWE. Especially, the QPP- b -PSK-3.5-TMA-based AEMFC showed the highest specific power among the state-of-the-art AEMFCs with noble metal catalysts.
ISSN:2050-7488
2050-7496
DOI:10.1039/d1ta10868a