Preparation of a nanoporous CuO/Cu composite using a dealloy method for high performance lithium-ion batteries

Nanoporous CuO/Cu composite materials with a bicontinuous structure are prepared by corroding a Cu-Al alloy. The obtained nanoporous CuO/Cu composites exhibit excellent performance as anodes for lithium ion batteries, which show a capacity of 600 mA h g(-1) at a current density of 500 mA g(-1) and maintain the capacity for 200 cycles and 445 mA h g(-1) at 1000 mA g(-1). The excellent electrochemical performance is attributed to the nanoporous and Cu-doped structure.