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Mg2Si promoted magnesio-mechanical reduction of silica into silicon nanoparticles for high-performance Li-ion batteries
- Source :
- Journal of Solid State Chemistry. 302:122408
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- In this study, we report a scalable magnesio-mechanical reduction method to prepare high quality silicon nanoparticles with good lithium storage performance using low cost starting materials. Although the reaction of Mg and silica is thermodynamically highly favorable, direct reaction using commercial Mg powder by mechanical milling at room temperature is difficult. However, by adding of 5 wt % Mg2Si, silica nanoparticles can be reduced into Si nanoparticles using commercial Mg as the reductant by mechanical milling at 250 rpm in 5 h. Mechanism study suggests that Mg2Si can effectively break the surface oxide layer of Mg due to its high rigidity modules and create fresh Mg surface to initiate the reaction. The obtained Si nanoparticles and Si@C composites exhibit excellent lithium storage performance comparable to that of the state-of-the-art nano-Si anode materials.
- Subjects :
- Materials science
Silicon
Nanoparticle
chemistry.chemical_element
Condensed Matter Physics
Lithium-ion battery
Electronic, Optical and Magnetic Materials
Ion
Anode
Inorganic Chemistry
Chemical engineering
chemistry
Materials Chemistry
Ceramics and Composites
Lithium
Physical and Theoretical Chemistry
Layer (electronics)
Ball mill
Subjects
Details
- ISSN :
- 00224596
- Volume :
- 302
- Database :
- OpenAIRE
- Journal :
- Journal of Solid State Chemistry
- Accession number :
- edsair.doi...........01118ef9a7369c2489db1b256ae6577f