Efficient conversion of sand to nano-silicon and its energetic Si-C composite anode design for high volumetric capacity lithium-ion battery

摘要: Abstract Silicon is an attractive anode material for Li-ion cells, which can provide energy density 30% higher than any of the today's commercial cells. In current study, environmentally benign, high abundant, and low cost sand (SiO2) source has been used to prepare nano-silicon via scalable metallothermic reduction method using micro wave heating. this research, we have developed optimized a synthesis purity nano silicon powder that takes only 5 min microwave heating magnesium mixture at 800 °C. Carbon coated electrode prepared by unique coating, polymerization finally in-situ carbonization furfuryl alcohol on nano-silicon. The electrochemical performance half cell carbon Si showed stable capacity 1500 mAh g−1 6 A g−1 over 200 cycles. A full fabricated lithium cobalt oxide having thickness ≈56 μm as cathode thin ≈9 μm. compact size exhibits excellent volumetric retention 1649 cm−3 0.5 C rate (C = 4200 g−1) extended cycle life (600 cycles). demonstrated LED lantern display board.