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 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 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 center dot h center dot g(-1) remained under high current rate of 3200 mA center dot 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.

Automated summary

Nanoporous Ge/Ag composite with a 3D porous structure exhibits superior lithium storage performances compared to pure Ge material, including higher reversible capacitance, optimized rate capability, and excellent cycling stability. The introduction of high-conductive Ag nanoparticles contributes to the enhanced performance, showing great potential as an advanced anode candidate for lithium ion batteries.