Title Page
Contents
ABSTRACT 10
Introduction 15
Chapter Ⅰ. 2D materials 19
1. MXene 19
2. Natural and Synthetic graphite 21
Chapter Ⅱ. Experimental methods 24
PART 1. MXene 24
1.1. Synthesis of MXene 24
1.2. Preparation of MXene-polymer composite inks 27
1.3. Rheological measurements & optical microscopy observation 27
PART 2. Natural and Synthetic Graphite 29
2.1. Materials 29
2.2. Preparation of anode slurry 31
2.3. Rheological measurements & optical microscopy observation 31
Chapter Ⅲ. Results and discussion 32
PART 1. MXene 32
1.1. Rheological properties of MXene-polymer composite inks 32
1.2. Illustrations of MXene-polymer composite microstructure & interaction 36
1.3. Elastic modulus dependence on the MXene content 43
PART 2. Natural and Synthetic Graphite 45
2.1. Dynamic strain amplitude sweep 45
2.2. Tap density & sedimentation test 48
2.3. Illustration of anode slurry microstructure 52
2.4. Non-linear rheological behavior of anode slurry 54
Chapter Ⅳ. Conclusion 56
Chapter Ⅴ. Reference 58
ABSTRACT IN KOREAN 66
Figure. 1.1. A diagram demonstrating that the rheological properties of MXene and synthetic graphite can provide application indicators for products that utilizing two-... 18
Figure. 1.2. Illustrations of lithium-ion battery manufacturing process and indicate potential impact of graphite types on the electrode process. 23
Figure. 2.3. Illustrations of MXene synthesis process and synthesized MXene. (a) Schematics for the preparation ofMXene (b) A scanning electronmicroscopy (SEM)... 25
Figure. 2.4. The modified minimally intensive layer delamination (MILD) technique and the addition of polymer additives to the process of creating MXene-polymer... 26
Figure. 2.5. A scanning electron microscopy (SEM) image of a (a)~(b) natural graphite and (c)~(d) synthetic graphite. 30
Figure. 3.6. Flow curve of MXene ink and MXene-polymer composite inks. (a) Flow curve (viscosity vs shear rate) and (b) flow curve normalized by high shear viscosity... 33
Figure. 3.7. Frequency sweep results of MXene-polymer composite inks. Frequency sweep test were conducted with a constant strain amplitude of 0.01. 34
Figure. 3.8. Flow curve of solution with 4wt% polymer added in water. 35
Figure. 3.9. Illustrations of (a) microstructure, (b) interaction between MXene particles, and (c) microscopy image of MXene ink solution. 39
Figure. 3.10. Illustrations of (a) microstructure, (b) interaction between MXene and PEG, and (c) microscopy image of MXene-PEG composite ink solution. 40
Figure. 3.11. Illustrations of (a) microstructure, (b) interaction between MXene and PEI, and (c) microscopy image of MXene-PEI composite ink solution. 41
Figure. 3.12. Illustrations of (a) microstructure, (b) interaction between MXene and PAA, and (c) microscopy image of MXene-PAA composite ink solution. 42
Figure. 3.13. Change in elasticmodulus (G′) dependent on the MXene content (wt%). In all samples, the weight ratio of MXene to polymer remained constant. 44
Figure. 3.14. Dynamic strain sweep test results for the slurries with (a) natural graphite and (b) synthetic graphite at a frequency of 10 rad/s. 46
Figure. 3.15. Elastic modulus (G′) dependent on the graphite volume fraction (φ). In all samples, the weight ratio of Gr·CB·CMC were fixed. 47
Figure. 3.16. Picture of cylinder beakers containing 10g of (a) natural and (c) synthetic graphite. Depict the reduced (b) natural and (d) synthetic graphite particle... 49
Figure. 3.17. (a) Sedimentation results of a slurry containing graphite, CB, CMC, and solvent, which was diluted ten times in a glass vial. (b) Sedimentation results of... 51
Figure. 3.18. Schematic illustration of slurry at low (left) and high (right) graphite volume fraction. 53
Figure. 3.19. Dynamic strain sweep results of (a) natural and (b) synthetic graphite slurries containing fixed weight fractions of graphite and CB at a ratio of 50:2, with... 55