Mo₂CT_x Supported Ruthenium Nanoparticles as Efficient Cathode Catalyst for Li-CO₂ Battery with High Capacity and Long Cycle Life

Abstract

Li-CO₂ batteries have garnered considerable attention due to their high energy density and their ability to utilize CO₂ resources. However, the generation of insulating discharge product Li₂CO₃ severely weakens its cyclability, which places high demands on the cathode catalyst in Li-CO₂ batteries. This study focuses on the development of Ru nanoparticles modified Mo₂CT_x as the cathode for Li-CO₂ batteries, which is integrated with a high surface area, abundant active sites, and enhanced conductivity. As a result, the Ru@Mo₂CT_x cathode achieves a remarkable discharge capacity of 20995 mA·h·g⁻¹ and a long cycle life of 1750 h. Additionally, density functional theory calculations provide further insights into the enhancement in absorptivity with Ru introduced onto Mo₂CT_x. This research paves the way for manipulating the catalytic activity of Mo₂CT_x and reducing the amount of usage of Ru in Li-CO₂ batteries.

Keywords

Catalyst / MXene / Ru nanoparticle / Long cycle life / Chemical Sciences / Physical Chemistry (incl. Structural)

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RIGHTS & PERMISSIONS

Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH