A low temperature molten salt process for aluminothermic reduction of silicon oxides to crystalline Si for Li-ion batteries
Top Cited Papers
- 23 September 2015
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Energy & Environmental Science
- Vol. 8 (11), 3187-3191
- https://doi.org/10.1039/c5ee02487k
Abstract
A low temperature molten salt process is developed to prepare crystalline Si nanoparticles through the reduction of micro-sized high silicon zeolite by metallic Al (or Mg) in molten AlCl3. The reaction can be initiated at 200 °C, and the yield is about 40%. As the reaction temperature increases to 250 °C, the yield can reach about 75%. When the prepared Si was used as an anode for Li-ion batteries, reversible capacities of 2663 mA h g−1 at 0.5 A g−1 after 50 cycles and 870 mA h g−1 at 3 A g−1 after 1000 cycles can be obtained. Similarly, this synthetic strategy is employed to synthesize Si nanoparticles starting from various abundant raw materials including SiO2 powder, kieselguhr, fiberglass, and even the natural mineral of albite.Keywords
This publication has 33 references indexed in Scilit:
- Nanostructured silicon for high capacity lithium battery anodesEnergy & Environmental Science, 2010
- Reversible Storage of Lithium in Silver‐Coated Three‐Dimensional Macroporous SiliconAdvanced Materials, 2010
- A Critical Size of Silicon Nano‐Anodes for Lithium Rechargeable BatteriesAngewandte Chemie-International Edition, 2010
- Nest‐like Silicon Nanospheres for High‐Capacity Lithium StorageAdvanced Materials, 2007
- Fabrication of Single‐Crystalline Silicon Nanowires by Scratching a Silicon Surface with Catalytic Metal ParticlesAdvanced Functional Materials, 2005
- Electrochemical Preparation of Silicon and Its Alloys from Solid Oxides in Molten Calcium ChlorideAngewandte Chemie-International Edition, 2004
- Pinpoint and bulk electrochemical reduction of insulating silicon dioxide to siliconNature Materials, 2003
- Anomalous Temperature Dependence of the Growth Rate of the Reaction Layer between Silica and Molten AluminumJournal of the American Ceramic Society, 2002
- Effect of Heating Rates on the Synthesis of Al2O3–SiC Composites by the Self‐Propagating High‐Temperature Synthesis (SHS) TechniqueJournal of the American Ceramic Society, 2001
- Raman spectral study of silicon nanowires: High-order scattering and phonon confinement effectsPhysical Review B, 2000