Ag Nanoparticles Anchored on Nanoporous Ge Skeleton as High‐Performance Anode for Lithium‐ion Batteries. Issue 10 (15th August 2021)

• Record Type: Journal Article
• Authors: Zhou, Ji; Huang, Peng; Hao, Qin; Zhang, Lina; Liu, Hong; Xu, Caixia; Yu, Jinghua
• Is Part Of: Chinese journal of chemistry. Volume 39:Issue 10(2021)
• Page Start: 2881
• Page End: 2888
• Publication Date: 2021-08-15
• Subjects: Germanium -- Nanostructures -- Dealloying -- Anode -- Lithium‐ion batteries; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.202100288
• Languages: English
• ISSNs: 1001-604X

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 Ge9 Ag1 Al90 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. Abstract : Ag nanoparticles anchored on the nanoporous germanium skeleton were conveniently fabricated through dealloying Ge9 Ag1 Al90 ternary alloy under mild condition. The as‐prepared nanoporous Ge/Ag material exhibits excellent lithium storage performances in terms of more superior reversible capacity, better rate capability, and much enhanced cycling stability compared with pure Ge. With the advantage of simple and green preparation as well as high performances, nanoporous Ge/Ag anode shows promising application prospect as an alternative candidate material in lithium ion batteries.