Na4Fe3(PO4)2P2O7 (NFPP432) Coated Aluminum Foil as Cathode Electrode (Disc, Sheet) for Na-Ion Battery, CSIBCENFPP432
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Using Na4Fe3(PO4)2P2O7 (NFPP432) on carbon-coated Aluminum foil represents one of the most commercially viable pathways for Sodium-ion batteries (SIBs). NFPP is a mixed-phosphate polyanion material that offers a "best-of-both-worlds" scenario: the structural stability of phosphates and a higher theoretical capacity (~129 mAh/g) than standard NVP, thanks to its unique crystal framework.
NFPP belongs to a class of materials with a complex 3D framework that allows for rapid sodium-ion diffusion. (1) High Thermal Stability: The strong P-O covalent bonds prevent oxygen release, making NFPP much safer than layered oxides (like Na-NCM) during thermal runaway. (2) Voltage Profile: It exhibits a very flat discharge plateau at approximately 3.1V, which simplifies battery management system (BMS) integration. (3) Low Volume Expansion: NFPP is a "zero-strain" material, meaning the crystal lattice expands/contracts very little (< 4%) during cycling, leading to an exceptionally long cycle life (often > 5,000 cycles).
Na4Fe3(PO4)2P2O7 (NFPP) coated on aluminum foil electrode (disc, sheet) 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 | CSIBCENFPP432 (C-SIB-CE-NFPP432) |
| Current collector | 15 um aluminum foil |
| Coating Material | Na4Fe3(PO4)2P2O7 (NFPP432) powder |
| Active Material Portion | 94.5% |
| Electrode Features |
(1) Round disc shape: D = 10 -15 mm (other diameter discs are also available). (2) Rectangle sheet size: (a) L150mm*W110mm, Single-Side, 13 mg/cm2, 1.51 g/cm3 (b) L150mm*W110mm, Single-Side, 22 mg/cm2, 1.58 g/cm3 (c) L150mm*W110mm, Double-Side, 26 mg/cm2, 2.35 g/cm3 |
| Package Size |
Round disk D=10-15 mm (50 pcs/pack) Rectangle sheet with SS & DS coating (5 pcs/pack) |
| First Discharging Specific Capacity |
~110 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 | 95.5 % |
Notes: (1) Please store the NFFP432 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:
- H. Yang, et al. Phase Regulation Promotes High Rate-Long Term Na4Fe3(PO4)2P2O7 Cathode for Sodium-Ion Batteries, Battery & SuperCaps, 2024, 7, e202400438.
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P. Zhu, et al. Promises and Challenges of Na4Fe3(PO4)2(P2O7) Cathode for Electric Vehicles and Energy Storage From an Industrial Perspective, Small, 2026, 22, e14884.
