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

Abstract

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·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.

Quasi‐Solid‐State Composite Electrolytes with Multifunctional 2D Molecular Brush Fillers for Long‐Cycling Lithium Metal Batteries†

“…In the past few decades, “rocking chair” lithium‐ion batteries have been widely used as high‐performance energy storage devices because of their long lifespan and good safety. [ 1‐3 ] By optimizing various components (electrode materials, separators, electrolytes, current collectors, etc . ), the energy density of traditional lithium‐ion batteries could be close to its theoretical value.…”

Highly Stretchable and Elastic Polymer Electrolytes with High Ionic Conductivity and Li‐Ion Transference Number for High‐Rate Lithium Batteries

“…[ 1‐6 ] Lithium‐ion batteries (LIBs) are one of the most promising candidates for stretchable power sources owing to their advantages of high energy density, low self‐discharge, and long‐term stability. [ 7‐20 ] As the electrolyte is one of the key components in LIBs, intrinsically stretchable polymer electrolytes (PEs) with satisfactory mechanical robustness are highly required for the fabrication of stretchable LIBs. [ 21‐28 ] From the perspective of practical applications, the stretchable PEs are expected to endow the stretchable LIBs with fast charging capability to minimize the charging time of wearable devices.…”

MOF‐Derived Materials Enabled Lithiophilic 3D Hosts for Lithium Metal Anode — A Review

“…In the 21st century, these problems have continuously promoted people to a search for clean and effective energy conversion technologies. [ 1‐6 ] Lithium‐ion batteries are recognized as a significant advancement in the field of energy storage technology and have a significant influence on contemporary civilization. [ 7‐14 ] However, the growing demand for higher energy densities cannot be met by the current battery configurations with graphite as the anode.…”

“…[ 1‐6 ] Lithium‐ion batteries are recognized as a significant advancement in the field of energy storage technology and have a significant influence on contemporary civilization. [ 7‐14 ] However, the growing demand for higher energy densities cannot be met by the current battery configurations with graphite as the anode. In recent years, due to its ultrahigh specific capacity (3860 mAh/g) and the lowest electrochemical potential (–3.04 V vs. H + /H 2 ), metallic lithium (Li) has been dubbed as the "Holy Grail" anode for lithium metal batteries (LMBs).…”