Nanostructured Anatase Titania as a Cathode Catalyst for Li-CO₂ Batteries

Lithium-carbon dioxide (Li-CO₂) batteries have garnered significant interest over the past 5 years as next-generation energy storage devices. In this article, we report a nanocomposite of anatase titania nanoparticles (TiO₂-NPs), carbon nanotubes, and carbon nanofibers as a freestanding gas diffusion cathode for Li-CO₂ batteries. Nanostructured anatase TiO₂ is demonstrated as a low-cost, easy-to-synthesize catalyst for CO₂ capture and utilization. With the developed composite electrode, we confirm the successful reversibility of the carbon dioxide reduction reaction and evolution reaction at the cathode and demonstrate improved Li-CO₂ cell performance through a variety of materials and electrochemical characterization techniques.