Dry Anode-Free Pouch Cells with NVP + Al/C for Sodium-Ion Battery, 1 Ah/pcs/pack, CSIBAFDPCNVPA

Dry Anode-Free Pouch Cells using Na3V2(PO4)3 (NVP) as the cathode and Carbon-coated Aluminum (Al/C) as the current collector represent a highly advanced, low-cost configuration for Sodium-Ion Batteries (SIBs).

While Copper (Cu) is the standard for anode-free Lithium cells, Aluminum (Al) is a game-changer for Sodium-ion research: (1) Cost & Weight: Aluminum is significantly lighter and cheaper than copper. (2) Oxidation Resistance: Unlike copper, aluminum is stable at the lower potentials required for sodium plating. (3) Role of Carbon (C): Bare aluminum has a native oxide layer (Al2O3) that is poorly conductive and "sodiophobic." The Carbon coating (often applied via your Slot-Die or Roll-to-Roll Coater) provides a conductive, high-surface-area interface that promotes a dense, "dendrite-free" sodium morphology.

Testing Processes:

(1) Electrolyte Filling with recommended amount in glovebox.
(2) First Time Aging: 45°C, aging time ≥ 15h in an oven.
(3) Formation conditions: 45°C, 5 min rest; 0.02C constant current charging (10% theoretical capacity or 5 h); 0.1C constant current charging (30% theoretical capacity, 3 h); 5 min rest; total capacity is 40% or 8 h;
(4) Second Time Aging: 45°C, aging time ≥ 24h in a oven
(5) Battery Analyzer for charging and discharging.

References:

1. Y. Jin, et al., Low-solvation electrolytes for high-voltage sodium-ion batteries, Nat. Energy, 2022, 7, 718–725. 
2. B. Liu, et al., Super-wetting interface engineering of space-confined micron-sized alloying anodes for high-performance sodium-based dual-ion batteries, Matter, 2025, 8, 102294.