Education: Master's degree

Degree: Master

Status: Graduated

Thesis title: Preparation process and performance of silicon-based thin-film lithium-ion battery anode materials

Research Direction: Silicon based thin film lithium-ion battery anode materials

Graduated to: Nanchang Kaixun Optoelectronics Technology Co.

Introduction: During the school period, we mainly used microwave plasma vapor deposition technology to prepare Si films with different crystallization rates and RF magnetron sputtering technology to prepare amorphous silicon films with different thicknesses and Si-Zr composite films with different compositions. The effects of crystallization rate and film thickness on the cycling performance of pure Si films were studied, and the effects of film composition on the cycling performance and interfacial contact impedance of Si-Zr composite films were investigated to compare the multiplicative performance of pure Si and Si-Zr composite films. The results show that with the increase of crystallization rate, the cycling stability of Si thin film anode material keeps deteriorating and the capacity decays rapidly. Amorphous Si films have the best cycling stability. With the increase of film thickness, the stress released during the cycling of Si films increased, and the Si electrode material showed more serious cracking and pulverization, which led to the deterioration of electrode cycling stability.The study of Si-Zr composite films showed that the Zr addition inhibited the cracking and pulverization during the cycling of film electrodes and improved the film electrode cycling stability.

Entrance date: 2016-09-01

Graduation date: 2019-06-30

Email: lqtyrliu@163.com