Description
ATOMFAIR® High-Efficiency NFS Sodium Iron Sulfate PowderRESEARCH GRADE | ADVANCED NFS SULFATE MATERIAL
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TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official institutional quotations.
EMAIL: inquiry@atomfair.com
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Brand Owner: Atomfair LLC
Brand: ATOMFAIR®
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This cathode powder requires strict moisture control during storage and handling to preserve its polyanionic sulfate structure. Electrolyte compatibility must be validated prior to cell assembly to ensure optimal electrochemical performance.
- Storage Requirements: Store the powder in an airtight container under inert gas to prevent moisture absorption and oxidative degradation.
- Electrolyte Compatibility: Validate electrolyte compatibility before use to avoid undesirable side reactions that could reduce Coulombic efficiency.
How does the carbon coating ratio of 1–3 wt% influence the electrochemical performance of this NFS cathode powder?
The 1–3 wt% carbon coating provides sufficient electronic conductivity to achieve a high initial Coulombic efficiency ≥97% and fast-charge capacity ≥77 mAh/g at 5C, without significantly reducing the active material fraction. This ratio is optimized within the specified impurity constraints (Al ≤50 ppm, etc.) to balance rate capability and capacity.
What are the impurity limits for transition metals like manganese and titanium in this NFS powder, and why are they important?
The impurity thresholds are Mn ≤150 ppm, Ti ≤50 ppm, and total unbound metals (Fe+Ni+Cr+Zn) ≤1 ppm. These strict limits prevent metal dissolution and cathode degradation during cycling, directly supporting the ≥97% initial Coulombic efficiency and stable fast-charge performance. The powder is Agilent ICP-OES verified for sodium content and contaminant levels.
What storage and handling protocols are required to maintain the specified moisture content below 1000 ppm?
The powder must be stored in sealed, dry containers (e.g., argon or vacuum) to keep residual moisture ≤1000 ppm, as confirmed by Karl Fischer at 200°C. Additionally, due to fine particle size (D90 ≤10 μm), handling should be conducted in a dry room or glovebox to prevent moisture uptake and electrostatic dust dispersion. The tapped density (0.7–1.2 g/cm³) suggests reasonable flow but fine particles require care.
This high-voltage NFS cathode powder delivers ≥97% initial Coulombic efficiency and ≥77 mAh/g at 5C, enabling fast-charge sodium-ion cells with tight cell-to-cell consistency, though its ≤1000 ppm moisture ceiling and sub-1 ppm unbound metal threshold demand rigorous dry-room and precursor purity controls.
Positive
- Exceptional initial Coulombic efficiency: With a 0.1C ICE ≥ 97%, this material minimizes parasitic side reactions during formation, providing reliable baseline performance for electrolyte and cell validation studies.
- Fast-charge kinetic capability: Maintaining ≥ 77 mAh/g at 5C discharge demonstrates robust rate performance, supporting high-power sodium-ion cell designs and rapid charging protocols.
Trade-offs
- Moisture-sensitive handling required: Residual moisture content is capped at 1000 ppm (Karl Fischer at 200°C), meaning the powder must be stored and processed in a dry environment (≤ -40°C dew point) to prevent capacity fade from hydrolysis.
- Ultra-low metallic impurity tolerance: Total unbound single metals (Fe+Ni+Cr+Zn) are limited to ≤ 1 ppm, which requires high-purity raw materials and dedicated processing lines to avoid contamination that could trigger self-discharge or voltage decay.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
