| 초록 |
In these days, lithium ion battery is important means to provide electricity for hybrid vehicle or portable device but graphite, which is formal anode material, has disadvantage because of its low capacity. Therefore, Silicon is regarded as new anode material because of its high capacity (4200mAh/g), abundance in nature and low lithium insertion voltage value. However, Silicon has low cyclability because of its large volume expansion. To solve this problem, variant morphology nanomaterial was made, for instance, Silicon Nanoparticle, Nanowire or Hollow shell type material. In this material, Meso-porous silicon nanoparticle by magnesiothermic reduction has many advantages including its morphologic stability and large surface area. Mesopore in porous silicon can secure enough space to endure volume expansion and effective lithium path could be gained by high surface area. Magnesiothermic reduction is also effective and low cost method then CVD or plasma composite method and it can maintain 3D morphology well. Therefore, this method could make better shape porous silicon and its result suggest mesoporus silicon can be effective anode material in next generation |
