Structural density of dendritic microstructures grown in circular domains: Micro- and nano-scale investigation
Physics of Fluids, cilt.37, sa.5, 2025 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 37 Sayı: 5
- Basım Tarihi: 2025
- Doi Numarası: 10.1063/5.0267533
- Dergi Adı: Physics of Fluids
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC, zbMATH
- Boğaziçi Üniversitesi Adresli: Evet
Özet
The stochastic instigation and growth of needle-like microstructures during the charging period in the rechargeable batteries can cause hazard and short circuit during the utilization, such that they control the state of health and longevity. Herein, we aim at establishing the relationship between the solid-mass/empty-space fractions of the growing electrodeposits and elaborate on the interrelation of such structural density with the electrodeposition parameters. We initially tackle on estimating the micro-scale density ρ Micro behavior through percolation-based image processing of the copper electrodeposition experiments and correlate them to the bulk salt concentration C 0 as well as the applied voltage V 0 . Subsequently, we establish a theoretical model for the growth rate of microstructures, considering both micro- and nano-scale porosity. Since the porosity of the growing microstructures directly correlates with their kinetics (i.e., rate) of growth, we have estimated the nano-scale density on the order of ρ Nano ∼ [ 10 − 4 , 10 − 3 ] via comparing the rate of porous ramification in the experiments and modeling frameworks. Consequently, we address the branching pattern of the dendritic microstructures and compute their real-time fractal dimension vs the applied voltage as well as the concentration and explain it in terms of oscillatory behavior between the nucleation and the branching. The obtained understanding from the correlation of density with the concentration and applied voltage, as well as the inherent atomic-scale density range in the amorphous electrodeposits, could help to tune the morphology of the electrodeposits, which could be helpful in applications such as rechargeable batteries to avoid short circuit and enhance longevity.