A nanosized silicon thin film as high capacity anode material for Li-ion rechargeable batteries

作者：Guo Hong; Zhao Hailei^*; Yin Chaoli; Qiu Weihua

来源：Materials Science and Engineering B-Solid State Materials for Advanced Technology, 2006, 131(1-3): 173-176.

DOI：10.1016/j.mseb.2006.04.008

• silicon thin film
• anode materials
• Li-ion batteries
• radio-frequency magnetron sputtering

Silicon thin film with thickness in range 1000-5300 angstrom deposited on rough Cu foil by a radio frequency magnetron sputtering is used as anode materials for Li-ion rechargeable batteries. The SEM, XRD and TEM analysis reveals that the Si thin film has a floccular nano-sized multi-crystalline structure. Li ions insertion/extraction evaluation is performed mainly with constant current charge/discharge cycling and cyclic voltammetry (CV) at room temperature. The cycleability and reversible discharge capacity are found to depend on the film thickness, and thinner films give larger accommodation capacity. A 3120 A Si film provides a reversible specific capacity over 3500 mA hg(-1) with excellent cycleability under 0.5 C charge/discharge rate.

• 出版日期2006-7-15
• 单位北京科技大学