Membrane Engineering Reveals Descriptors of CO2 Electroreduction in an Electrolyzer
- Authors
- Yang, Seok Hwan; Jung, Wonsang; Lee, Hyeonggeon; Shin, Sang-Hun; Lee, Seung Jae; Cha, Min Suc; Choi, Woong; Oh, Seong-Geun; Lee, Ki Bong; Lee, Ung; Won, Da Hye; Lee, Jang Yong
- Issue Date
- Apr-2023
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS ENERGY LETTERS, v.8, no.4, pp.1976 - 1984
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS ENERGY LETTERS
- Volume
- 8
- Number
- 4
- Start Page
- 1976
- End Page
- 1984
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/185741
- DOI
- 10.1021/acsenergylett.3c00420
- ISSN
- 2380-8195
- Abstract
- Anion exchange membranes (AEMs) and ionomers are keys for electrochemical CO2 reduction (eCO2R), but their development and multiple roles have not been intensively investigated. This study demonstrates HQPC-tmIM, a polycarbazole-based anion-conducting material, as a commercially viable AEM and reveals through multiphysics model simulation key descriptors governing eCO2R by exploiting the extraordinary membrane properties of HQPC-tmIM. The mechanical/chemical stability of HQPC-tmIM showed superior eCO2R performance in a membrane electrode assembly electrolyzer (MEA) in comparison to a commercial AEM (Sustainion). The CO partial current density (jCO) of -603 mA cm-2 on HQPC-tmIM MEA is more than twice that of Sustainion MEA and is achieved by only introducing HQPC-tmIM AEM and binder. The mutiphysics model revealed that the well-constructed membrane morphology of HQPC-tmIM leads to the outstanding membrane conductivity, and it enables high jCO through the facilitated charge transfer in overall reactions. This research suggests guidelines for developing a commercially viable AEM and ionomer for eCO2R.
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