Title Page
Contents
ABSTRACT 11
Ⅰ. INTRODUCTION 13
Ⅱ. EXPERIMENTAL 16
Part 1. Silica suspension 16
1.1) Materials 16
1.2) Diffusing wave spectroscopy (DWS) 16
1.3) Rheological measurements 19
Part 2. Anode slurry 19
2.1) Materials 19
2.2) Rheological measurements 20
2.3) Optical microscopic observation 21
2.4) Sequence of Physical Process (SPP) analysis method 21
Ⅲ. RESULTS AND DISCUSSION 25
Part 1. Silica suspension 25
1.1) Microstructure and dynamics evolution 25
1.2) Rheological evolution 29
1.3) Interpretation of the temporal evolution via interparticle potential 33
1.4) Effect of hydration force on microstructure 41
Part 2. Anode slurry 48
2.1) Intra-cycle rheological behavior 48
2.2) Temperature-dependent rheological behavior 54
2.3) Optical microscopic observation 60
2.4) Effect of temperature on microstructure 64
Ⅳ. CONCLUSION 66
Ⅴ. REFERENCE 68
ABSTRACT IN KOREAN 79
Table 3.1. Net attractive interaction range of silica suspension calculated with the conventional DLVO theory and extended DLVO theory. 40
Figure 2.1. Diagrams of diffusing wave spectroscopy. 18
Figure 2.2. (a) The trajectory represents the rheological behavior in a three-dimensional space with the x, y, and z-axis corresponding to strain rate, strain, and stress, respectively.... 24
Figure 3.1. Time-dependent changes in the silica suspension at three different pH conditions observed with naked eye. The images were taken by inverting the vial at the... 26
Figure 3.2. Time-averaged autocorrelation function g₂(τ) - 1 of silica suspensions at (a) 0 hours, (b) 2 hours, (c) 12 hours, and (d) 24 hours. 28
Figure 3.3. Angular frequency sweep results of silica suspensions conducted at (a) 0 hours, (b) 2 hours, (c) 12 hours, and (d) 24 hours. 30
Figure 3.4. Dynamic strain amplitude sweep results of silica suspensions conducted at (a) 0 hours, (b) 2 hours, (c) 12 hours, and (d) 24 hours. 32
Figure 3.5. Interparticle potential for the silica suspension at different pH levels. In this figure, the solid and dashed lines represent the van der Waals attraction (Vνdw) and...[이미지참조] 35
Figure 3.6. Interparticle potential curves for the silica suspension at each pHs. (a) The conventional DLVO potential (VDLVO). (b) The extended DLVO potential (Ve-DLVO) is...[이미지참조] 37
Figure 3.7. Dynamic strain amplitude sweep results for silica suspensions under pH 3 and 5 at (a) 10 wt%, (b) 15 wt%, (c) 20 wt%, (d) 25 wt%, and (e) 30 wt%. 43
Figure 3.8. Yield strain (γc) as a function of particle volume fraction (φ) for silica suspensions at (a) pH 3, and (b) pH 5.[이미지참조] 45
Figure 3.9. Summary of the different microstructures and interparticle potentials formed in silica suspensions at various pH values. 47
Figure 3.10. (a) Elastic Lissajous curve and (b) Cole-Cole plot for Absent CMC at 25℃. Corresponding points are indicated with the same color and number. (c) Cole-Cole plot at... 49
Figure 3.11. (a) Elastic Lissajous curve and (b) Cole-Cole plot for Excess CMC at 25℃. Corresponding points are labeled with point colors and numbers. (c) Cole-Cole plot at... 51
Figure 3.12. (a) Elastic Lissajous curve and (b) Cole-Cole plot of the Intermediate CMC case at 25℃. Corresponding points are labeled with distinct colors and numbers. (c) Cole-... 53
Figure 3.13. Dynamic strain amplitude sweep results for (a) Absent CMC, (b) Excess CMC, and (c) Intermediate CMC at different temperatures. 56
Figure 3.14. The results of a dynamic strain amplitude sweep test conducted with four repeated temperature cycles. (a) Absent CMC, (b) Excess CMC, (c) Intermediate CMC,... 59
Figure 3.15. (a) Anode slurry diluted tenfold and captured at a10 times magnification using an optical microscope. (b) Binary image obtained through image processing. 61
Figure 3.16. (a) Anode slurry diluted tenfold, captured at a 50 times magnification using an optical microscope. (b) The corresponding binary image obtained through image processing. 63
Figure 3.17. An illustration summarizing the internal structure of the anode slurry, incorporating all the previously discussed findings. 65