Magnesiothermic Reduction‐Enabled Synthesis of Si−Ge Alloy Nanoparticles with a Canyon‐Like Surface Structure for Li−Ion Battery

Abstract

Scheme 1. Preparation scheme of canyon-like porous SiÀGe alloy nanoparticles (cpSG@C).

Rapid, energy-efficient and pseudomorphic microwave-induced-metal-plasma (MIMP) synthesis of Mg2Si and Mg2Ge

“…Given that plasma is essentially a gas formed from ions and electrons, the Mg 2 Si and Mg 2 Ge synthesis processes can be likened to many conventional high temperature solid-gas reactions, which are often similarly pseudomorphic. 61,62 The principal difference in the MIMP case is that it is the metal starting material that reacts ostensibly in the gaseous phase. Any contrast, therefore, between the MIMP Mg 2 X reactions mainly lies in the state of X.…”

Review of silicon-based alloys for lithium-ion battery anodes

“…Si-Ge alloys with various structures have been prepared by combining the concepts of pure nano-Si materials with structural design (Figs. 5(c)-5(h)) [58,[62][63]. Compared with traditional structures, these new structures present special features.…”

Structural Strategies for Germanium‐Based Anode Materials to Enhance Lithium Storage

“…For example, Si/Ge composites were synthesized through one‐step metathesis reaction between Mg 2 Si and GeO 2 . Nanostructured Si–Ge alloy material with unique canyon‐like surface porosity can be prepared by magnesiothermic reduction of SiO 2 –GeO 2 composite material . Ge–Sn composites with porous hierarchical were synthesized through direct metathesis reaction between Mg 2 Ge and SnCl 4 .…”

“…The C and Ge rich electrodes were mostly spherical in shape and were able to preserve the pre‐cycling morphology even after 10 cycles at low current density of 200 mA g −1 . Si‐Ge alloy NPs with canyon‐like surface structure showed the specific capacity of 1771 mAh g −1 at a current density of 500 mA g −1 after 100th cycle …”