We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Structural Kinetics Model to Describe the Thixotropic Behavior of Cathode Slurry for Lithium-Ion Batteries.
- Authors
Zhao, Bin; Gao, Yunfei; Ren, Jinagtao; Yin, Deshun
- Abstract
The thixotropic properties of electrode slurry used in the manufacturing of lithium-ion batteries affect the coating processes. Understanding the relationship between its structural parameters and microstructure evolution will be helpful for slurry preparation and coating processes. In this work, a structural kinetics constitutive model is proposed to describe the thixotropy of slurry, in which the structural parameter λ is utilized to assess the evolution of the microstructure. The results show that the proposed model is in good agreement with experimental data for steady-state flow, and the degree of structure can be well described by the structural parameter λ for different cathodes slurries, indicating that coarse Li(Ni,Mn,Co)O2 (NMC) powder forms an extremely brittle network structure with no significant yield stress, while fine LiFePO4 (LFP) powder presents a robust network structure. Besides, the strength of the structure is distinctly improved by adding the high-molecular polyvinylidene difluoride (PVDF) as binder and carbon black as conductive agent.
- Subjects
SLURRY; LITHIUM-ion batteries; STEADY-state flow; POLYVINYLIDENE fluoride; LITHIUM-ion battery manufacturing
- Publication
Journal of Electronic Materials, 2021, Vol 50, Issue 12, p6818
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-021-09236-5