Porous Co3O4/CuO Composite Assembled from Nanosheets as High-Performance Anodes for Lithium-Ion Batteries.

Upon dealloying a carefully designed CoCuAl ternary alloy in NaOH solution at room temperature, a Co₃O₄/CuO nanocomposite with an interconnected porous microstructure assembled by a secondary structure of nanosheets was successfully fabricated. By using the dealloying strategy, the target metals directly grew to form uniform bimetallic oxide nanocomposites. Owing to the unique hierarchical structure and the synergistic effect of both active electrode materials, the Co₃O₄/CuO nanocomposite exhibits much enhanced electrochemical performance with higher capacities and better cycling stability compared to anodes of pure Co₃O₄. Moreover, it performs excellently in terms of cycle reversibility, Coulombic efficiency, and rate capability, at both low or high current rates. With the advantages of unique performance and ease of preparation, the as-made Co₃O₄/CuO nanocomposite demonstrates promising application potential as an advanced anode material for lithium-ion batteries. [ABSTRACT FROM AUTHOR]