The new generation of core material for lithium battery, 3D composite current collector different from the traditional planar copper foil/aluminum foil, subverts "metal - polymer - metal" sandwich structure, with a three-dimensional porous skeleton constructed from flame-retardant fiber base membrane, and a double-sided deposited highly conductive metal layer (Cu/Al) to form a through-type three-dimensional conductive network. With four core strengths: ultra-lightweight, high conductivity, strong suppression of lithium dendrites and adaptation to solid-state batteries, it won the China first invention patent of 3D composite current collector.

Core Parameters (Sample Specification)

        Base material:  Flame retardant high performance fiber/carbon nanotube composite fiber (T 8 – 20 μ m)

        Porosity:  ≥70%

 Area resistance:  5-20mΩ/□

 Area density:  20-40 g/m² (Lighter ≥70% than conventional copper foil)   

 Spec.:  Customizable

Core Strengths：

      1. High-energy density: The 3D structure improves the active material loading, the improved battery energy density by 9 – 18%.

      2. Ultra-fast charging: The 3D conductive network shortens the ion migration path, the improved rate performance by 30% above.

      3. High safety: The porous structure buffers the volume expansion to inhibit the growth of lithium dendrites, adapted to the interface requirements of solid-state batteries.

      4. Long cycle life: Interface impedance (about 2/3) reduced, the cycle stability improved, the capacity decay in 1000 cycles<10%.

Application:

Lithium battery for consumer, power and energy storage; sodium battery for small power and  energy storage

Confidential and not for public disclosure........