鋰離子電池在目前人類生活中應用廣泛，隨著科技的進步，目前的性能已經無法滿足人們的需求。富鋰正極材料有著高的放電容量及高電壓的優點，被視為下一世代鋰離子電池高容量正極材料。但仍然存在著一些問題導致到目前都無法被商業化應用，如低初始庫倫效率、倍率性較差及容量與電壓隨著循環次數而衰減。因此本實驗透過共沉澱法合成富鋰正極材料前驅物，再與氫氧化鋰混合後經由高溫燒結合成富鋰正極材料Li1.2Mn0.6Ni0.4O2.2。並且採用不同元素及濃度進行改質，對正極材料進行XRD、SEM及SLS的物性分析。隨後製作成極板並與鋰金屬搭配組裝成鈕扣型電池，進行C-rate、Cycle、AC及CV的電化學測試，期望可以改善其電化學性能。

Nowadays, lithium-ion batteries are widely used. However, as the rapid changes of people’s life, the functions of lithium-ion batteries have no longer good enough. Therefore, it is necessary to develop lithium-rich cathode materials.
Because lithium-rich cathode materials have the main advantages of the high discharge capacity and high voltage, they have been regarded as the high capacity cathode materials for the next generation. However, there are still problems which block the materials from commercial usage, such as low initial coulombic efficiency, low rate performance, fade of capacity, and voltage during cycling. Thus, in order to improve the electrochemical performance of lithium-rich cathode materials, in the study, there are important steps and methods:
(1) Use the co-precipitation method to synthesize lithium-rich cathode material precursor then mix with lithium hydroxide.
(2) Use high-temperature sintering and the modification of different elements and concentrations to synthesize lithium-rich cathode material Li1.2Mn0.6Ni0.4O2.2.
(3) Use physical properties of XRD, SEM and SLS to analyze the cathode materials.
(4) Made them into a plate and assembled with a lithium metal to form a coin cell.
(5) Proceed electrochemical test of C-rate, Cycle, AC and CV.

摘要...................................................i
Abstrace...................................................ii
誌謝...................................................iii
目錄...................................................iv
表目錄...................................................vi
圖目錄...................................................vii
第一章 緒論...................................................1
1.1 前言...................................................1
1.2 研究動機...................................................1
第二章 文獻回顧...................................................3
2.1 鋰離子電池介紹...................................................3
2.1.1 鋰離子電池簡介...................................................3
2.1.2 鋰離子電池工作原理...................................................4
2.2 鋰離子電池基本組成...................................................5
2.2.1 正極材料...................................................5
2.2.2 負極材料...................................................5
2.2.3 隔離膜...................................................6
2.2.4電解液...................................................6
2.3正極材料介紹...................................................7
2.3.1 LiCoO2...................................................7
2.3.2 LiNiO2...................................................8
2.3.3 LiMn2O4...................................................9
2.3.4 LiFePO4...................................................10
2.3.5 富鋰xLi2MnO3‧(1-x)LiMO2.................................................11
2.4 富鋰正極材料的改質...................................................14
2.4.1 釩元素摻雜改質...................................................14
2.4.2 铷元素摻雜改質...................................................16
第三章 實驗步驟...................................................18
3.1 實驗材料與設備...................................................18
3.1.1 實驗材料...................................................18
3.1.2 實驗設備及器具...................................................18
3.2 實驗流程...................................................20
3.2.1 共沉澱法合成富鋰正極材料前驅物Mn0.6Ni0.4CO3...............................21
3.2.2 富鋰正極材料及鑭、鎂、鋁及鉻改質富鋰正極材料合成...........................22
3.2.2.1 富鋰正極材料合成...................................................22
3.2.2.2 鑭改質富鋰正極材料合成................................................22
3.2.2.3 鎂改質富鋰正極材料合成................................................22
3.2.2.4 鋁改質富鋰正極材料合成................................................22
3.2.2.5 鉻改質富鋰正極材料合成................................................22
3.2.3 漿料製作...................................................23
3.2.4 漿料塗佈...................................................23
3.2.5 極板處理...................................................23
3.2.6 鈕扣型電池組裝...................................................24
3.3 分析儀器...................................................25
3.3.1 X光繞射儀(X-ray Diffraction)...........................................25
3.3.2 場發射電子顯微鏡(Field Emission Scanning Electron Microscope)...........26
3.3.3 靜態散射粒徑分佈儀...................................................26
3.3.4 充放電機...................................................27
3.3.5 恆電位儀...................................................28
第四章 結果與討論...................................................29
4.1 晶體結構分析...................................................29
4.2 粒徑分佈分析...................................................34
4.3 表面形貌分析...................................................42
4.4 倍率性能分析...................................................47
4.5 循環性能分析...................................................58
4.6 交流阻抗分析...................................................61
4.7 循環伏安分析...................................................63
第五章 結論...................................................66
未來展望...................................................68
參考文獻...................................................69
Extended Abstract...................................................73

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