Oxygen‐Mediated Isotropic Lithium Diffusion on Electrocatalyst Surface for Efficient Li–CO 2 Batteries
Year: 2025
Type: article
Abstract: By combining renewable electricity storage with electrochemical CO 2 recycling, Li–CO 2 batteries offer a dual‐purpose technology that is critical for carbon neutrality. However, their efficiency is severely limited by the sluggish reaction of insulating discharge products, including Li 2 CO 3 , which are dominated by Li + diffusion and coupling process. In this study, a new type of oxygen‐mediated isotropic lithium diffusion on the electrocatalyst surface is discovered, resulting in a breakthrough in dynamic rates and high‐current performance in Li–CO 2 batteries. Using Ru‐based electrocatalysts as a proof‐of‐concept, the oxygen isotropic mediation brings short‐range oxygen coordination as Li + jumping channels, and long‐range isotropic structures for free Li + diffusion pathways. The electrocatalyst achieved Li + surface diffusion at 5.0 × 10 −11 cm s −1 , a tenfold improvement over rates measured on conventional electrocatalysts, and directly accelerated the Li 2 CO 3 nucleation and decomposition. The electrocatalyst‐based cells demonstrated the elevated discharge and charge voltage of 2.86 and 3.76 V. This study provides guidelines for electrocatalyst design with ultrafast ion diffusion on the surface and accelerates the adoption of efficient Li–CO 2 batteries.
Source: Advanced Materials
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
Funders: National Natural Science Foundation of China, University of Science and Technology of China, National Synchrotron Radiation Laboratory, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities, Fundamental Research Funds for Central Universities of the Central South University, Beijing Synchrotron Radiation Facility
OpenAlex ID: W4415784438