三元素摻雜LLTO混LLZO應用鋰離子電池

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黃黨同南(Hoang Dang Tung Nam) 查詢紙本館藏

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材料科學與工程研究所

論文名稱

三元素摻雜LLTO混LLZO應用鋰離子電池
(The tri-doping LLTO mixed with LLZO for lithium battery electrolyte)

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摘要(中)

鋰離子電池（LIB）是電動汽車（EV）電源和可再生能源存儲系統的潛在候選者之一。但是，鋰枝晶的形成阻礙了鋰離子電池（LIB）的有機液體電解質的開發，由於易燃材料的性質，鋰枝晶的形成會引起短路和爆炸。此外，液體有機電解質的有限的電化學窗口也挑戰了裝置升級的可行性。因此，應用鈣鈦礦材料LLTO的全固態電池被認為是下一代鋰離子電池的解決方案。

摘要(英)

Lithium ion battery (LIB) is one of the potential candidates for electric vehicles (EVs) power source and renewable energy storage system. However, the development of organic liquid electrolyte for lithium ion batteries (LIBs) has been obstructed by lithium dendrite formation, which can cause short circuit and explosion due to the nature of inflammable material. Furthermore, the limited electrochemical window of the liquid organic electrolytes also challenge the feasibility of device upgrade. Therefore, all-solid-state-battery with the application of perovskite material LLTO is considered to be a solution for the next-generation lithium ion battery.

關鍵字(中)

★ 鋰離子電池
★ LLTO
★ LLZO
★ 固態電解質

關鍵字(英)

★ Lithium ion battery
★ LLTO
★ LLZO
★ solid state electrolyte

論文目次

摘要 i
Abstract i
Acknowledgement ii
Table of Contents iii
List of figures v
List of tables vii
Chapter 1 1
Introduction 1
1.1. Crystal structure of the lithium lanthanum titanate 3
1.2. Mechanism of ion diffusion in LLTO crystal structure 4
1.3. Grain boundary conductivity 6
1.4. Lithium secondary battery 9
Chapter 2 11
Experiment 11
2.1. Preparing precursors 11
2.1.1. Preparing LLTO precursor powder 11
2.1.2. Synthesize Al-doped LLZO powder 12
2.1.3. Fabrication of the solid-state electrolyte 13
2.1.4. Preparation of cathode 14
2.1.5. Battery assembly 15
2.2. Experimental equipment 17
2.2.1. Ball-milling machine 17
2.2.2. High-temperature sintering oven 18
2.2.3. X-ray diffraction 18
2.2.4. Scanning electron microscopy (SEM) 19
2.2.5. Electrochemical impedance spectroscopy (EIS) 19
2.2.6. Battery charge/discharge test 20
Chapter 3 22
Result and Discussion 22
3.1. X-ray diffraction analysis 22
3.2. Raman spectroscopy 28
3.3. Scanning Electron Microscopy (SEM) 29
3.4. EDS analysis 33
3.5. EIS analysis 34
3.6. Battery charge/discharge test 36
3.6.1. Pseudo solid-state battery 36
3.6.2. LVP/trivalent doping LLTO mix 10 wt% LLZO pellet/LVP all solid-state battery charge/discharge 37
Conclusion 41
Reference 42

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指導教授

李勝偉(Sheng-Wei Lee)

審核日期

2020-8-24

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