臺灣博碩士論文加值系統

本實驗室目前合成出許多電化學性質良好的活性材料，但以往在製成電極的過程中，實驗室無法製備出高負載質量的電極，電極也因此無法達到商用條件(Loading mass ≥ 10 mg/cm2)。本研究利用熱壓的方式降低傳統塗布法的電極厚度，並以提高塗布的次數以達到負載質量能夠高於10 mg/cm2的目的。
此研究中，我們以銳鈦礦二氧化鈦作為活性材料，碳黑作為導電材以及聚偏二氟乙烯(PVDF)作為黏合劑，利用塗布機將漿料以7：2：1(活性材料：導電材：黏合劑)的比例均勻地塗布在銅箔上，再以熱壓機將電極的厚度降低，並利用調整熱壓機參數進行電極材料塗佈的控制，在最優化條件下，製備出負載質量達4.537 mg/cm2的鋰離子電池負極。與傳統的塗布法比較，發現當以此方式製備電極時，不僅可以大量製備具備高負載質量且低厚度的電極，且其電阻可以有效的下降。並由充放電的循環測試可以發現由此方式製備出的高負載質量的電極可以維持與傳統塗布法的循環穩定性，且由於負載質量的提升，塗布再熱壓所製備的三層電極的電容值(0.0953mA h)可以擁有遠高於傳統塗布法的電容值(0.0162 mA h)。

Our laboratory has synthesized many active materials with excellent electrochemical properties. However, in the past, we were unable to produce electrodes with high loading mass during electrode fabrication, which prevented the electrodes from meeting commercial standards (Loading mass ≥ 10 mg/cm²). In this study, we employed a hot-pressing technique to reduce the thickness of electrodes made by traditional coating methods and increased the number of coating layers to achieve a loading mass greater than 10 mg/cm².
In this research, we used anatase titanium dioxide as the active material, carbon black as the conductive material, and polyvinylidene fluoride as the binder. The slurry, with a ratio of 7:2:1 (active material: conductive material: binder), was uniformly coated onto copper foil using a coating machine. Subsequently, a hot press was used to reduce the electrode thickness, and by adjusting the parameters of the hot press, the coating process of the electrode material was controlled. Under optimized conditions, we produced a lithium-ion battery anode with a loading mass of 4.537 mg/cm².Compared to the traditional coating method, this approach allows for the mass production of electrodes with high loading mass and low thickness, while effectively reducing their resistance. From the charge-discharge cycling tests, it was observed that the electrodes fabricated with this method maintained the cycling stability comparable to that of the traditional coating method. Furthermore, due to the increased loading mass, the three-layer electrodes prepared by the coating and hot-press method exhibited a significantly higher capacity (0.0953 mAh) compared to the traditional coating method (0.0162 mAh).

中文摘要 i
ABSTRACT ii
目錄 iv
圖目錄 vi
表目錄 viii
第一章 緒論 1
1-1 引言 1
1-2 鋰離子電池 2
1-2-1 鋰離子電池的發展 2
1-2-2 鋰離子電池的工作機制與原理 3
第二章 基礎理論與文獻回顧 6
2-1 二氧化鈦 6
2-1-1 銳鈦礦 (Anatase) 7
2-1-2 金紅石 (Rutile) 8
2-1-3 TiO2-B (Bronze) 9
2-2 18650電池 11
2-3 熱壓原理與文獻回顧 13
2-4 提高負載質量的方式 15
第三章 研究動機 18
第四章 實驗部分 19
4-1 實驗藥品及儀器 19
4-1-1 實驗藥品 19
4-1-2 實驗儀器 20
4-2 熱壓機的使用 21
4-3 電極的製備 23
4-4 鈕扣電池的組裝 26
4-5 電化學分析 28
4-5-1充放電循環測試(Charge/Discharge) 28
4-5-2電化學阻抗測試(Electrochemical impedance spectroscopy, EIS) 30
第五章 實驗部分 32
5-1 不同塗布機刻度塗布電極之負載質量 32
5-2 溫度、滾輪速度、上下軸高度對電極的影響 34
5-2-1 滾輪速度的影響 34
5-2-2 不同溫度對於電極表面的影響 35
5-2-3 利用不同步驟的製作電極方式比較負載質量的多寡 40
5-2-4 不同層數電極的厚度和負載質量 42
5-3 電化學分析 45
5-3-1 充放電循環測試 (Charge/Discharge) 45
5-3-1-1 恆電流密度充放電測試 (Cyclic performance) 45
5-3-1-2 不同電流密度充放電測試 (Rate performance) 47
第六章 總結 49
第七章 未來展望 50
參考文獻 51

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