Description
ATOMFAIR 1.0 Ah NCM811 Graphite Anode Dry Pouch CellRESEARCH GRADE CELL ARCHITECTURE
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Store the dry pouch cell in a dry, inert atmosphere (argon or nitrogen) to prevent moisture absorption by the ultra-high nickel cathode and graphite anode. Avoid mechanical deformation, puncture, or short-circuiting to eliminate the risk of thermal runaway.
- Moisture Sensitivity: Minimize exposure to ambient humidity by handling and storing the cell in a glovebox or dry room with a dew point below -40°C.
- Electrical Safety: Keep the cell terminals insulated and avoid contact with conductive surfaces to prevent inadvertent short circuits.
- Temperature Stability: Maintain storage temperature between 15°C and 25°C to slow degradation of the ceramic-coated separator and electrode materials.
- Mechanical Integrity: Do not apply excessive pressure or fold the pouch as the laminated stack relies on precise layer alignment and seal integrity.
This dry pouch cell is supplied without electrolyte and must be activated in an inert atmosphere prior to electrochemical testing. Follow these steps to safely fill, seal, and form the cell for reproducible benchmark results.
Required Equipment: Argon-filled glovebox (H₂O, O₂ < 0.1 ppm), Electrolyte injection syringe with Luer lock, Pouch heat sealer with vacuum port, Battery cycler with temperature chamber
- Transfer to glovebox
Place the dry pouch cell into an argon-filled glovebox with moisture and oxygen levels below 0.1 ppm before unsealing the outer packaging. - Inject electrolyte
Draw the selected electrolyte into a syringe and inject the recommended volume (typically 0.8–1.2 mL) through the pre-cut fill port of the pouch. - Seal the pouch
Apply vacuum during sealing to eliminate gas pockets, then heat-seal the fill port using a pulsed sealer at 180–190°C for 2–3 seconds. - Allow rest period
Let the sealed cell rest at open circuit for 4–12 hours to ensure complete wetting of the separator and electrode pores. - Perform formation cycling
Connect the cell to a battery cycler and run a formation protocol with a C/10 charge to 4.25 V and discharge to 2.5 V for at least two cycles.
How does the negative-to-positive capacity ratio of 1.116 affect cell safety versus energy density in this NCM811/Gr dry pouch cell?
The NP ratio of 1.116 provides an 11.6% anode excess over cathode capacity, which reduces the risk of lithium plating at the 4.25 V high-voltage cutoff by ensuring the anode can accommodate all lithium ions intercalated from the cathode. This excess capacity slightly decreases the overall energy density of the cell due to the additional anode mass, but it is a deliberate trade-off to enable safe evaluation of novel electrolyte additives and high-voltage cycling protocols.
What cathode and anode areal loading asymmetry exists in this dry pouch cell and why is it important for electrolyte additive testing?
The cathode has a single-side coating areal density of 15 mg/cm² with dimensions 45.5 mm × 64 mm, while the anode has 9.5 mg/cm² with dimensions 46.5 mm × 65 mm. The larger anode footprint and lower areal loading relative to the cathode, combined with the regulated NP ratio of 1.116, ensure complete cathode coverage and prevent edge-initiated lithium plating. This precise geometric and capacity balancing provides a reliable baseline for isolating electrolyte additive effects on impedance growth and gas evolution.
What storage conditions are recommended for this dry pouch cell prior to electrolyte filling to maintain cathode integrity?
The un-functionalized NCM811 cathode is highly sensitive to ambient moisture and carbon dioxide; storage in a sealed container under an inert argon atmosphere with H2O and O2 levels below 0.1 ppm is standard practice to prevent surface carbonate formation and capacity fading. The product is shipped dry without electrolyte, and after receipt it should be kept in a dry room or glovebox to preserve the pristine cathode surface for accurate electrolyte screening experiments.
This dry pouch cell offers a precisely engineered NCM811/graphite benchmarking platform with a controlled NP ratio of 1.116 and 97.2% active cathode mass fraction, enabling reproducible electrolyte and impedance studies. However, the cell is supplied without electrolyte, requiring user-performed wetting and activation in an inert atmosphere, and the 4.25 V upper cutoff demands rigorous voltage management to mitigate high-nickel cathode degradation.
Positive
- High-fidelity baseline for validation: The dry pouch assembly with stable intercalation configuration provides an absolute baseline for variable elimination in electrolyte additive verification, high-voltage impedance growth modeling, and gas evolution screening.
- Engineered NP ratio and stack design: A negative-to-positive capacity ratio of 1.116 and precise laminated multi-layer stack layout ensure reproducible electrochemical behavior and consistent layer-to-layer contact during testing.
Trade-offs
- Requires user-performed electrolyte filling: The cell is shipped dry; the operator must infuse liquid electrolyte and activate the cell under inert conditions, demanding glovebox infrastructure and expertise in pouch cell wetting protocols.
- High-nickel cathode at elevated cutoff: The 4.25 V upper voltage window stresses the un-functionalized NCM811 cathode, increasing the risk of capacity fade and gas evolution if cycling parameters are not meticulously controlled.
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 for completely unopened items).
