Poly(carbazole)-based anion-conducting materials with high performance and durability for energy conversion devices
- Poly(carbazole)-based anion-conducting materials with high performance and durability for energy conversion devices
- 박현서; Min Suc Cha; Ji Eun Park; Sungjun Kim; Seung-Hui Han; Sang-Hun Shin; Seok Hwan Yang; Tae-Ho Kim; Duk Man Yu; Soonyong So; Young Taik Hong; Sang Jun Yoon; Seong-Geun Oh; Sun Young Kang; Ok-Hee Kim; Byungchan Bae; 성영은; Yong-Hun Cho; Jang Yong Lee
- 수전해; 수소; 전기화학; 연료전지
- Issue Date
- Energy & environmental science
- VOL 13, NO 10-3645
- Anion conducting polymers (ACPs) are essential materials for alkaline electrochemical energy technology such as anion-exchange membrane fuel cells (AEMFCs) and water electrolysers (AEMWEs). The aforementioned polymers are promising alternatives for proton exchange membrane-based systems due to the possibility of using platinum group metal-free electrocatalysts. However, there are still no reliable ACPs possessing the desired performance and stability, which is a major challenge for developing alkaline energy systems. Herein, we highlight an anion-exchange membrane and ionomer based on quaternised poly-carbazole (QPC-TMA) with a rigid ether-free and curved backbone structure comprised of carbazole monomers. The developed ACP exhibits excellent ionic conductivity, as well as chemical and mechanical stability. Moreover, the AEMFC using QPC-TMA shows excellent performance (1.61 W cm− 2) compared with the other best-performing AEMFCs. In addition, the AEMWE using QPC-TMA demonstrates outstanding stability and state-of-the-art performance (3.5 A cm− 2 at 1.9 V), which is the first report of an AEMWE that outperforms the best-performing proton-exchange membrane water electrolysers.
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