近年來，隨著環保意識的抬頭，符合環境永續發展的綠色能源受到各國的重視，而電池是一透過電化學反應，將化學能轉化為電能使用，鋰離子電池具有較高的能量密度、較長的循環特性、體積輕薄短小、擁有較好的安全性、對環境較友善且有多種材料可以做為活性材等優點，受到各國的重視與研究，使鋰離子電池擁有更高的能量密度、可快充快放、兼顧安全性的提升與成本的降低，成為發展最大的目標。
本研究使用SiOx，其成本低且容易取得，對環境也非常友善，但卻擁有初始庫倫效率低以及體積變化導致電池循環性及初始電容量不佳的問題，故使用高能球磨，透過簡單、低成本、可大量製造及再現性高的工藝對其進行改質，並添加Si粉，希望提升其初始庫倫效率，並利用熱處理使其呈現核殼結構，提供緩衝的空間增加其循環穩定性， 本研究成功製備出有效提升初始庫倫效率且電池循環壽命穩定性佳的 (3:1) SiOx /Si複合材料，且具有快速充放電的能力，具有最好的電化學性質。

In this study, SiOx is choose to used, because it is low-cost and easy to obtain, and is also very friendly to the environment. However, it has the challge of poor initial coulombic efficiency and poor cyclability and low capacity . Therefore, high-energy ball milling is used. It is modified by a process with low cost, plenty production and high reproducibility, and Si powder is added to improve its initial Coulomb efficiency, and CVD is used to make the core-shell structure, providing a buffer space to increase its cycle stability. The research successfully prepared a (3:1) SiOx/Si composite material that can effectively improve the initial Coulomb efficiency 、 cycle life stability, and has the ability to charge and discharge rapidly , show the best electrochemical properties.

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