Unlocking Li CO2 Battery Catalytic Potential via High Entropy Alloy Driven Synergistic Coupling for Amorphous Pathway Stabilization

Li CO2 batteries utilizing greenhouse gas CO2 as feedstock offer high energy density and environmental benefits. However, the sluggish CO2 redox kinetics at cathodes lead to high overpotentials and low Coulombic efficiency, severely limiting practical applications. Here, the potential of Li CO2 batteries is unlocked through a high entropy alloy HEA driven synergistic coupling strategy using a PtPdFeCoCuZn PPFCCZ catalyst amp; 8764;2.2 nm . The unique multi element composition of the PPFCCZ catalyst creates an interfacial environment that enables ternary synergistic coupling among the interface metal, Li2CO3, and Li2C2O4, collectively stabilizing the amorphous Li2C2O4 formation pathway. This design achieves a record discharge voltage of 3.1 V with an ultralow overpotential 0.48 V in Li CO2 batteries. Additionally, it achieves a cycling lifespan exceeding 1000 h at a current density of 20 A cm amp; 8722;2, overcoming the conventional trade off between voltage and reversibility. This work provides a paradigm for designing multi functional HEA catalysts to manipulate reaction pathways in Li CO2 batteries