Anchoring Ru/RuO2 Nanoparticles on Porous Carbon Shell as An Efficient Cathode Catalyst for Li‐CO2 Battery. Issue 7 (17th February 2022)

• Record Type: Journal Article
• Authors: Lian, Zheng; Pei, Ying; Ma, Shiyu; Lu, Youcai; Liu, Qingchao
• Is Part Of: ChemistrySelect. Volume 7:Issue 7(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-17
• Subjects: Li-CO2 batteries -- kinetics -- Ru/RuO2 nanoparticles -- reaction process; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202104549
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Rechargeable Li‐CO2 batteries have received a lot of attention due to their high energy density and ability to fix the greenhouse gas CO2 . However, the lagged kinetics of CO2 reduction reaction (CRR) and CO2 evolution reaction (CER) has been restricting the development and application of Li‐CO2 batteries. Herein, ultrafine Ru/RuO2 nanoparticles anchored on hierarchical porous carbon shell (Ru/RuO2 ‐HPC) is designed and applied as an efficient cathode catalyst for Li‐CO2 batteries. The anchored Ru/RuO2 nanoparticles act as catalytic site not only accelerate CRR and CER kinetics but also tailor the reaction process of Li‐CO2 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‐CO2 battery based on Ru/RuO2 ‐HPC cathode displays enhanced electrochemical performances, including high capacity, excellent round‐trip efficiency, and outstanding cycling stability. Abstract : Ultrafine Ru/RuO2 nanoparticles anchored on hierarchical porous carbon (Ru/RuO2 ‐HPC) is designed and applied as an efficient cathode. The rich porous structure of the cathode and the high catalytic activity of Ru/RuO2 promote the mass transfer of the reactants and improve the reaction kinetics. Benefiting from these advantages, electrochemical performances of the Li‐CO2 battery based on Ru/RuO2 ‐HPC cathode are heavily enhanced.