,

NEI Introduces Sodium Ferric Pyrophosphate (“NFPP”) electrode sheets

April 10, 2025

NEI is pleased to now offer Sodium Ferric Pyrophosphate (Na4Fe3(PO4)2P2O7) electrode sheets. NFPP has emerged as an attractive cathode material for sodium-ion batteries. The advantages of NFPP mirror that of LiFePO₄ (LFP) in lithium-ion batteries, such as excellent cycling stability and relatively low cost for high volume applications. Similar to LFP, NFPP has a NASICON-type structure with a structurally stable 3D framework. In addition to demonstrating a reversible capacity of about 100 mAh/g, NFPP has an operating voltage of 3.1V (Na+/Na). The intrinsic electronic conductivity of NFPP is low, as it is in most other phosphate-based materials.

NEI NFPP SEM images

SEM images showing the surface and cross section of NANOMYTE® NAB-65E NFPP electrode

NANOMYTE® NAB-65E

NEI’s NAB-65E electrodes are fabricated using ultrafine NFPP particles with carbon in such a fashion that the inherent drawbacks of NFPP are overcome. In addition to being able to customize the loading and electrode formulation for NAB-65E, NEI can also customize the composition of NFPP through substitution of the cations.

Product Specifications:

  • Active Material Formula: Na4Fe3(PO4)2P2O7
  • Average Particle Size (D50): 6.5 µm
  • Specific Surface Area: 7.4 m2/g
  • Current Collector: Aluminum (16 µm thick)
  • Sheet Dimensions: 5 in x 10 in (127 mm x 254 mm); coated edge-to-edge
  • Calendared: Yes
  • Electrode Coating: Single or Double-sided sheets (as specified)
  • Coating Thickness: 100 µm ± 5% (excluding current collector)
  • Standard Expected Areal Capacity: 1.0 mAh/cm2 ± 5% (per side)
  • Active Material Loading: 10.0 mg/cm2 ± 5% (per side)

Technical Links:
View Specification Sheet (pdf) | View Safety Data Sheet (pdf)

Available Quantities:
NEI electrode sheets are available in packs of 2, 5, & 10-sheet packs or larger. Request a quote today!

NEI Sodium-ion Electrode Sheets

NEI produces an extensive range of Na-ion cathode and anode electrode sheets, with the option to choose from our standard specifications or customized to meet your specific research needs. Our sodium-ion battery electrode sheets offer a reliable and efficient solution for researchers and developers pushing the boundaries of this exciting energy storage technology. Learn More »

Electrode Customization Options

Don’t settle for a one-size-fits-all solution! NEI understands that your battery development needs are unique. With NEI’s customizable electrode fabrication services, you have the power to create the perfect lithium-ion battery solution for your unique needs. NEI’s electrodes can be customized to your specification in order to accommodate different active material loadings, electrode composition, coating widths and thickness, binder type & content, and more. To make your custom request, fill out our quote form, select “Custom” under specifications, and let us know your requirements in the comments.

About NEI Corporation:

For over 27 years, NEI Corporation has provided advanced material solutions to customers worldwide. NEI excels in designing, developing, and producing application-specific materials. The company offers a comprehensive range of solutions, including cathode, anode, and electrolyte materials for lithium-ion and sodium-ion batteries, as well as extensive in-house materials development, characterization, and testing services. NEI’s materials science expertise facilitates close partnerships and seamless product integration.

 

/by