Polymeric Porous Electrodes for Electrochemically Mediated Carbon Dioxide Capture

Carbon capture is a promising technology to mitigate emissions and achieve net carbon neutrality. Electro-swing reactive adsorption using redox-active species is emerging as a versatile platform for a sustainable decarbonization approach. However, the pricy electrode with limited gas diffusion has become one of the major factors hindering its practicality. Herein, we developed thick hydrogel coated-polymeric electrodes with high porosity that can effectively enhance the diffusion of carbon dioxide without the assistance of gas diffusion conduct. Such porous electrode also enables more interactive sites for redox-active polymers, leading to a ~ 90% quinone utilization efficiency at saturation. We also achieved continuous carbon capture-release operations with excellent capacity, stability, and Faradaic efficiency. Armed with lightweight and low-cost, as-developed electrodes present a vast potential to advance the future implementation of electrochemical carbon separation technologies.