Fabrication and Characterization of All-Solid-State Secondary Lithium Batteries
Date Issued
2010
Date
2010
Author(s)
Tu, Yi-Chun
Abstract
The size of 3C portable electronic products become lighter, thinner, shorter, and smaller with the rapid development of technology and life, indicating the battery have to exhibit a higher energy and lower self-discharge rate characters. As a result, it is quite important to develop high performance of solid-state lithium ion batteries. The solid-state thin film lithium battery is characteristic of the thin, solid state, no leakage problems, slight temperature variability, flexibility, which are better than that of traditional lithium battery.
The variance of microstructure, composition, and electrochemical properties on solid electrolytes were demonstrated under desired sputtering parameters (such as rf power, working pressure, and substrate temperature) in present study. The ionic conductivity of thin film was approached by a.c. impedance measurement. X-ray absorption spectroscopy (XAS) was performed to characterize the electronic structure of LiPON thin film and the effect of O2 fraction on LiCoO2 cathode film. The effect between deposition condition and electrochemical nature were investigated by employing the XAS approach. The optimum LiPON and LiCoO2 thin film were adopted as solid electrolyte and cathode, respectively. All solid-state lithium ion secondary battery was constructed from LiPON and LiCoO2. Thus, the charge/discharge and device property can be clearly verified and studied.
Subjects
Solid-state lithium ion batteries
LiPON thin film
X-ray absorption spectroscopy
Type
thesis
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