O3-Type Layered Oxide NaNi1/3Fe1/3Mn1/3O2 (NFM111) Dry Electrode (Disc, Sheet) with High Loading (29-58 mg/cm2) for Na-Ion Battery, CSIBDEHLNFM111
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Developing O3-type NaNi₁/3Fe₁/3Mn₁/3O2 (NFM111) dry electrodes is a strategic move for high-energy-density sodium-ion batteries. Applying dry electrode technology to NFM111 is particularly beneficial because O3-type oxides are notoriously sensitive to moisture and air, which can lead to the formation of NaOH or Na2CO3 on the surface when using traditional NMP-based wet slurries.
For NFM111, the PTFE fibrillation process must be finely tuned to handle the particle morphology of the layered oxide. (1) High-Shear Mixing: NFM111 particles are typically spherical secondary clusters (micrometer scale). These must be mixed with 5–8% PTFE and conductive agents (like Super P + CNT) using a high-intensity mixer to ensure the PTFE "web" encapsulates the active material without crushing the secondary spheres. (2) The "Dough" Formation: Unlike NFPP, NNFMO is more rigid. The mixture must often be heated to 80-100 degrees during the initial mixing/shearing phase to soften the PTFE and encourage fibril formation. (3) Precision Calendering: To achieve high loading (e.g., 20-40 mg/cm}^2), the gap between the calender rolls must be adjusted in small increments to prevent the NNFMO particles from fracturing under excessive pressure.
O3-Type Layered Oxide NaNi1/3Fe1/3Mn1/3O2 (NFM111) Dry Electrode can be used as sodium-ion battery cathode. 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 | CSIBDEHLNFM111 (C-SIB-DEHL-NFM111) |
| Current collector | 15 um aluminum foil with carbon coating (1 um on each side) |
| Dry Coating Material | NaNi1/3Fe1/3Mn1/3O2 (NFM111) powder |
| Active Portion | 96.3% |
| Electrode Features |
(1) Round disc shape: D = 10 -15 mm (2) Rectangle sheet shape: (a) 29 mg/cm2, single-side, 2.1 g/cm3, L120 mm*W90 mm (b) 58 mg/cm2, double-side, 2.9 g/cm3, L120 mm*W90 mm |
| Package Size |
Round disk D=10-15 mm (50 pcs/pack) Rectangle sheet with SS & DS coating (5 pcs/pack) |
| First Discharging Capacity |
~115 mAh/g (0.1 C, testing voltage range of 2.0-4.0 V, Electrolyte:1.0M NaPF6 in EC:DMC:EMC=1:1:1 Vol% with 1.0%FEC) |
| First Columbic Efficiency | 92.8 % |
Notes: (1) Please store the dry NFM111 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. Tang, et al. Enhanced stability and electrochemical performance of O3-type NaNi1/3Fe1/3Mn1/3O2 cathode material via yttrium doping for advanced sodium-ion batteries, Ionics, 2024, 30, 7026-7036.
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N. Hong, et al. Full-Scale Regulation Enabled High-Performance Sodium O3-Type Layered Cathodes, Angew. Chem. Int. Ed., 2025, 64, e202423479.
