Nanoporous (NP) Ge/Ag composite is controllably fabricated via one simple dealloying method under mild conditions.After corroding the well-designed Ge9Ag1Al90 source alloy,the resulting Ge/Ag consists of the three dimensional (3D) interconnected Ge network skeleton with Ag nanoparticles uniformly dispersed onto the surface.Benefitting from unique 3D porous nanostructure and introduc-tion of high-conductive Ag,the NP Ge/Ag composite exhibits much enhanced lithium storage performances by comparison with pure Ge material,including higher reversible capacitance,optimized rate capability as well as superior cycling performances.Besides,the NP Ge/Ag holds high cycling stability with large reversible capacity of 500 mA·h·g-1 remained under high current rate of 3200 mA·g-1 for an extended period of 300 loops.The Ge/Ag composite presents great potential in applications as an advanced anode candidate for lithium ion batteries in virtue of its excellent performances and green fabrication.