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Title Page 2
Contents 5
Abstract 8
1. Introduction 9
2. Experimental 14
2.1. Materials 14
2.2. Synthesis of Polyamic Acid (PAmA) and Lithium-Substituted Polyamic Acid (Li-PAmA) 14
2.3. BMI Crosslinking of Polyamic Acid 15
2.4. Preparation of the Electrode Using PI binder 16
2.5. Thermal Imidization of PAmA to Polyimide (PI) 16
2.6. Fabrication of the Lithium Half Coin Cell 17
2.7. Electrochemical measurements 17
3. Results and Discussion 18
3.1. Effect of Thermal Treatment Temperature on Polyimide and Electrode Performance 18
3.2. Effect of Dianhydride Structure on Polyimide Properties 30
3.3. Effect of BMI Crosslinking on Polyimide Network and Electrode Integrity 37
4. Conclusion 44
5. References 46
국문요약 52
[Figure 1] (a) Comparison of key properties between graphite and silicon as anode... 10
[Figure 2] Schematic illustration of polyimide binder structures before and after BMI... 13
[Figure 3] Synthesis route of lithium-substituted polyamic acid (Li-PAmA) and its thermal... 20
[Figure 4] FT-IR spectra of (a) PAmA and (b) Li-PAmA samples synthesized using PMDA... 21
[Figure 5] Imidization degree (ID) of PAmA and Li-PAmA samples determined from FT-IR... 22
[Figure 6] ¹H NMR spectra of Li-substituted PAmA and thermally treated samples (140-... 23
[Figure 7] DSC thermograms of polyimide samples thermally treated at 140°C, 200°C,... 25
[Figure 8] STA curves of polyimide samples with (bottom) and without (top) lithium salt... 25
[Figure 9] Load-displacement curves obtained from nanoindentation of polyimide... 27
[Figure 10] Electrochemical performance of polyimide electrodes prepared at various... 29
[Figure 11] Chemical structures of the dianhydrides and diamine used for polyamic acid... 33
[Figure 12] Load-displacement curves obtained from nanoindentation testing of... 34
[Figure 13] Schematic of the 180° peel test configuration (top) and corresponding peel... 35
[Figure 14] (a) Cycling performance with different dianhydrides. (b) Rate capability of... 37
[Figure 15] Schematic of BMI crosslinking with PAmA and the formation of a crosslinked... 39
[Figure 16] (a) Peel strength profiles of BMI-crosslinked polyimide binders synthesized... 40
[Figure 17] Cycling performance and coulombic efficiency of BMI-crosslinked polyimide... 42
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