Anchoring Ru/RuO <sub>2</sub> Nanoparticles on Porous Carbon Shell as An Efficient Cathode Catalyst for Li‐CO <sub>2</sub> Battery
Zheng Lian, Ying Pei, Shiyu Ma, Youcai Lu, Qingchao Liu
Abstract
Abstract Rechargeable Li‐CO 2 batteries have received a lot of attention due to their high energy density and ability to fix the greenhouse gas CO 2 . However, the lagged kinetics of CO 2 reduction reaction (CRR) and CO 2 evolution reaction (CER) has been restricting the development and application of Li‐CO 2 batteries. Herein, ultrafine Ru/RuO 2 nanoparticles anchored on hierarchical porous carbon shell (Ru/RuO 2 ‐HPC) is designed and applied as an efficient cathode catalyst for Li‐CO 2 batteries. The anchored Ru/RuO 2 nanoparticles act as catalytic site not only accelerate CRR and CER kinetics but also tailor the reaction process of Li‐CO 2 batteries, making discharge products are more susceptible to form sheet‐like by a surface‐adsorption pathway, which is easier to be decomposed in charge process. As a result, Li‐CO 2 battery based on Ru/RuO 2 ‐HPC cathode displays enhanced electrochemical performances, including high capacity, excellent round‐trip efficiency, and outstanding cycling stability.