Print Email Facebook Twitter Bipolar Membrane and Interface Materials for Electrochemical Energy Systems Title Bipolar Membrane and Interface Materials for Electrochemical Energy Systems Author Tufa, Ramato Ashu (Technical University of Denmark) Blommaert, M.A. (TU Delft ChemE/Materials for Energy Conversion and Storage) Chanda, Debabrata (Henan University, Kaifeng) Li, Qingfeng (Technical University of Denmark) Vermaas, D.A. (TU Delft ChemE/Transport Phenomena) Aili, David (Technical University of Denmark) Date 2021 Abstract Bipolar membranes (BPMs) are recently emerging as a promising material for application in advanced electrochemical energy systems such as (photo)electrochemical CO2 reduction and water splitting. BPMs exhibit a unique property to accelerate water dissociation and ionic separation that allows for maintaining a steady-state pH gradient in electrochemical devices without a significant loss in process efficiency, thereby allowing a broader catalyst material selection for the respective oxidation and reduction reactions. However, the formation of high-performance BPMs with significantly reduced overpotentials for driving water dissociation and ionic separation at conditions and rates that are relevant to energy technologies is a key challenge. Herein, we perform a detailed assessment of the requirements in base materials and optimal design routes for the BPM layer and interface formation. In particular, the interface in the BPM presents a critical component with its structure and morphology influencing the kinetics of water dissociation reaction governed by both electric field and catalyst driven mechanisms. For this purpose, we present, among others, the advantages and drawbacks in the utilization of a bulk heterojunction formed in 3D structures that recently have been reported to demonstrate a possibility of designing stable and high-performance BPMs. Also, the outer layers of a BPM play a crucial role in kinetics and mass transport, particularly related to water and ion transport at electrolyte-membrane and membrane-catalyst interfaces. This work aims at identifying the gaps in the structure-property of the current monopolar materials to provide prospective facile design routes for BPMs with excellent water dissociation and ionic separation efficiency. It extends to a discussion about material selection and design strategies of advanced BPMs for application in emerging electrochemical energy systems. Subject 2D/3D interfacesbipolar membraneenergy conversion and storageion exchange membranepH gradientwater dissociation To reference this document use: http://resolver.tudelft.nl/uuid:7a8793e1-1199-4f5f-899d-72200368dd3c DOI https://doi.org/10.1021/acsaem.1c01140 Embargo date 2022-07-22 ISSN 2574-0962 Source ACS Applied Energy Materials, 4 (8), 7419-7439 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type review Rights © 2021 Ramato Ashu Tufa, M.A. Blommaert, Debabrata Chanda, Qingfeng Li, D.A. Vermaas, David Aili Files PDF Manuscript_Accepted_version.pdf 2 MB Close viewer /islandora/object/uuid:7a8793e1-1199-4f5f-899d-72200368dd3c/datastream/OBJ/view