Roll-to-Roll Electrochemical Intercalation and Exfoliation System for Continuous Fabrication of Two-Dimensional Sheets, ETDSR2REIES
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A lab-scale electrochemical cell for anodization and electropolishing (EP) is designed to perform high-voltage dielectric oxide growth or controlled anodic dissolution on valve metals (Al, Ti, Zr, Nb, Ta) and alloys (stainless steel, Nitinol, Co-Cr).Both processes treat the workpiece as the anode, but they operate under divergent electrochemical regimes: electropolishing drives mass-transport-limited leveling and micro-smoothing, whereas anodization drives field-assisted oxide growth and self-assembled nanopore/nanotube formation.
The choice of operational polarity dictates the defect density, lateral flake size, and electronic quality of the resulting 2D sheets. There are two types of electrochemical intercalation and exfoliation: anodic exfoliation and cathodic exfoliation.
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References:
- C. C. Chen, et al. Electrochemical characteristics of surface of titanium formed by electrolytic polishing and anodizing, Journal of Materials Science, 2005, 40, 4053-4059.
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A. Acquesta, et. al., The Electropolishing of Additively Manufactured Parts in Titanium: State of the Art, Advanced Engineering Materials, 2021, 23, 2100545