Ag Nanoparticles Anchored on Nanoporous Ge Skeleton as High‐Performance Anode for Lithium‐ion Batteries

Main observation and conclusion Nanoporous (NP) Ge/Ag composite is controllably fabricated via one simple dealloying method under mild conditions. After corroding the well‐designed Ge 9 Ag 1 Al 90 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 introduction 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.