Description
ATOMFAIR 1.12 Ah NCM811 Fast-Charging Graphite Dry Pouch CellRESEARCH GRADE CELL ARCHITECTURE
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ATOMFAIR 1.12 Ah NCM811 Fast-Charging Graphite Dry Pouch Cell – Handling and Storage Specifications – Handling
This dry pouch cell is supplied without electrolyte and must be stored in a dry, inert atmosphere to prevent moisture-induced degradation of the NCM811 cathode. It requires controlled electrolyte injection and formation cycling prior to use, with a safe voltage window of 2.75 V to 4.2 V.
- Design Capacity: The cell's nominal design capacity of 1.12 Ah is achieved only after proper electrolyte filling and formation.
- Voltage Window: The operating voltage window of 2.75 V to 4.2 V defines the safe electrical limits and fast-charge cutoff control.
- NP Ratio: The negative-to-positive capacity ratio of 1.130 is set for fast-charge safety balancing and must be maintained during cell assembly.
- Separator Coating: The separator includes a 2 µm Al₂O₃ ceramic coating for thermal and mechanical stability during high-rate cycling.
- Lamination Stack: The 9/10 coated multilayer electrode arrangement requires precise alignment to prevent internal short circuits during lamination.
How does the NP ratio of 1.130 influence fast-charge performance and safety in this NCM811/graphite dry pouch cell?
The NP ratio of 1.130 provides a highly regulated fast-charge safety balance by ensuring the negative electrode capacity exceeds the positive, preventing lithium plating during high-rate charging. This ratio is critical for maintaining cycle stability at the 4.2 V cutoff while enabling the 1.12 Ah nominal capacity target after activation.
What formation protocol is recommended for activating the dry pouch cell to achieve the 205 mAh/g cathode capacity?
The cell is supplied as a dry assembly without electrolyte and requires the researcher to infuse their own electrolyte and execute a formation cycling protocol appropriate for NCM811 and graphite chemistries. The cathode baseline specific capacity of 205 mAh/g and anode 345 mAh/g are baseline values achieved after activation, typically using a low-rate formation cycle to establish the solid electrolyte interphase.
What are the environmental requirements for handling and storing this dry pouch cell prior to electrolyte filling?
The dry cell assembly is moisture-sensitive and should be stored and handled in a dry, inert atmosphere such as an argon-filled glovebox with low water and oxygen content. The 12 μm PE + 2 μm Al2O3 ceramic separator provides mechanical integrity, but exposure to ambient air can degrade the dry electrodes and compromise the benchmarking fidelity.
This 1.12 Ah dry pouch cell with ultra-high nickel NCM811 cathode and high-rate graphite anode is optimized as a baseline platform for fast-charge electrolyte validation. Delivered without electrolyte, it requires user infusion and activation cycling to achieve its rated capacity.
Positive
- High-fidelity benchmarking platform: Assembled as a dry pouch cell without electrolyte, this configuration provides a controlled baseline to eliminate variables during fast-charge electrolyte formulation verification and localized polarization growth modeling.
- Regulated NP ratio for safety: The negative-to-positive capacity ratio of 1.130 is precisely balanced to ensure safe fast-charge operation, minimizing the risk of lithium plating during high-rate cycling.
Trade-offs
- Requires user electrolyte infusion: Delivered as a dry pouch cell without liquid electrolyte, the end user must perform electrolyte filling and wetting steps before any electrochemical testing can commence.
- Capacity requires activation cycling: The nominal 1.12 Ah capacity is a target after activation; initial cycling and formation protocols are necessary to reach the stated high-rate baseline performance.
