目前商業化的鋰離子二次電池，主要以碳基材為負極材料，但其理論電容量只有372mAh/g，因此各方極力開發新的負極材料，以增加鋰離子嵌入的數目，進而提高其電容量及循環壽命。本實驗室以二氧化錫作為負極材料，可較傳統碳材多出50％容量，而在目前大多數人的研究中，都是只以觀察鋰離子二次電池充放電的電化學行為為主，所以本研究以循環伏安法搭配充放電實驗，深入的觀察各階段的微結構及相變化為研究主軸。
本實驗是以反應性射頻磁控濺鍍(Sputter)和超音波霧化法來製備二氧化錫薄膜當作負電極，另一極為純鋰金屬，而電解液是由LiClO4溶於體積比為1：1 的ethylene carbonate(EC)和dimethyl carbonate(DMC)混合溶液中，配置而成。在組裝完電池之後，我們以固定電流的方式充放電至我們所需之電壓，設定的電流為0.09mA；而另一方面我們進行循環伏安(Cyclic Voltammetry)量測，改變電壓之掃描速率與區間，完成實驗後，我們再以 X-ray以及SEM觀察不同條件下所產生之相變化與微結構，以推論鋰離子進出二氧化錫電極時之行為細節。

Carbon-based materials are currently used for anodes in commercial lithium ion secondary batteries. The theoretical capacity for carbon is only 372mAh/g, and new materials are being developed for anodes to raise the electrical capacity and cycling times. One of the most promising materials is tin oxide that has 50% more electrical capacity and has been studied extensively in the industrial and academic institutions. While most studies have been concentrated on the electrochemical behavior in the charge-discharge process, microstructure evolution along with phase transformation have been emphasized in this work.
Tin oxide films are deposited on stainless steel substrate by sputtering and spray. A cell consists of a pure lithium foil as anode and tin oxide film as cathode along with 1M LiClO4 in DMC/EC mixture as electrolyte is fabricated and employed in the charge-discharge test and Cyclic Voltammetry. In the charge-discharge test, we use a constant current of 0.09mA to charge or discharge to the voltage that we need. In the Cyclic Voltammetry test, we change the scanning rate and scanning range. Microstructures developed and phase transformation in different stages of the charge-discharge or CV test process are examined by XRD, SEM and TEM.

目錄
目錄….……………………………………………………..…………..Ⅰ
英文摘要………………………………………………………..……...Ⅱ
中文摘要………………………………………………………..……...Ⅲ
圖目錄……………………………………………………..…………...Ⅳ
第一章 前言…………………..……………………………….....……01
第二章 文獻回顧………………………..……………………….……03
第三章 實驗藥品與步驟…………..…………………………….……14
第四章 實驗結果……………………………………………..……….21
第五章 討論……………………………………………..…………….78
第六章 結論…………………………………………………………...92
參考文獻……………………………………………………………….94

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