Oligomeric chain extender-derived anion conducting membrane materials with poly(p-phenylene)-based architecture for fuel cells and water electrolyzers. Issue 17 (4th April 2022)

• Record Type: Journal Article
• 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
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 17(2022)
• Page Start: 9693
• Page End: 9706
• Publication Date: 2022-04-04
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1ta10868a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : 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. Abstract : 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 mgPGM −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.