High-Voltage LiCoO2 (LCO) Dry Electrode (Disc, Sheet) with High Loading (~30 mg/cm2) for Li-Ion Battery, CLIBDEHLLCO
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A LiCoO2 (LCO) High-Loading Dry Electrode (~ 30 mg/cm2) represents an advanced high-energy-density configuration for lithium-ion batteries. While conventional wet-slurry casting of LCO struggles with severe binder migration, cracking, and delamination at high thicknesses due to rapid solvent evaporation, solvent-free dry film processing (utilizing fibrillated PTFE or similar sustainable binder networks) overcomes these limitations. This allows for the successful fabrication of thick, crack-free, high-capacity cobalt-based cathodes. This allows for the successful fabrication of thick, crack-free, high-capacity cobalt-based cathodes.
The advantages of dry-process LCO at high loadings (~30 mg/cm2) are: (1) Elimination of Solvent Defects: Completely bypasses toxic solvent (NMP) drying stages, preventing the pinholes, vertical binder segregation, and mud-cracking common in thick wet-coated LCO electrodes. (2) High Tap Density & Structural Integrity: The intense mechanical shearing and calendering involved in dry-film fabrication yield a dense, uniform electrode structure with optimized porosity, ensuring high volumetric energy density crucial for portable electronics and high-end pouch cells. (3) Enhanced High-Voltage Stability: When paired with stable solid-state or gel polymer electrolyte systems (such as those incorporating PEO/PGMA or fluorinated acrylates like TFMA/TFOA), thick high-voltage LCO dry electrodes suppress cobalt dissolution and interfacial side reactions during deep charging cycles.
The round disc shape with single-side coating is suitable for coin cell testing, while the rectangle sheet shape with single- or double-side coating is designed for single-layer or multiple-layer pouch cell testing.
| Part Number | CLIBDEHLLCO (C-LIB-DEHL-LCO) |
| Current collector | 15 um aluminum foil with carbon coating (1 um on each side) |
| Dry Coating Material | LCO Polycrystalline powder |
| Active Portion | 96.5% |
| Electrode Features |
(1) Round disc shape: D = 10 -15 mm (2) Rectangle sheet shape: L120 mm*W90 mm (single-side). The double-side coating is not available yet. |
| Area Density (Loading) |
30 mg/cm2 (single-side) |
| Compaction Density |
~3.0 g/cm3 |
| Package Size |
Round disk D=10-15 mm (50 pcs/pack) Rectangle sheet with SS & DS coating (5 pcs/pack) |
| First Discharging Capacity |
~190 mAh/g (0.1 C, testing voltage range of 3.0-4.5 V) |
| First Columbic Efficiency | 95.2 % |
Notes: (1) Please store the dry LCO electrodes in a dry area (glovebox is preferred); (2) The battery electrodes are highly recommended to be dried at 80-100°C in a vacuum oven for 6-12 h before use.
References:
- W. Yao, et al. A 5 V-class cobalt-free battery cathode with high loading enabled by dry coating, Energy Environ. Sci. (2023) 16 (4): 1620–1630.
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J. Wang, et al. High-Area-Capacity Cathode by Ultralong Carbon Nanotubes for Secondary Binder-Assisted Dry Coating Technology, ACS Appl. Mater. Interfaces (2024) 16 (20): 26209–26216.