Lithium Copper Composite Tape Solid-state Battery Negative Electrode Lithium Foil Material

​Product Overview​​

Lithium-copper (Li-Cu) composite foil is an advanced anode material designed for high-performance solid-state batteries (SSBs). By combining ultra-thin lithium metal (≤20 μm) with a copper current collector, this hybrid structure addresses critical challenges of lithium dendrite growth, interfacial instability, and volume expansion in SSBs. The Cu substrate enhances mechanical strength and current distribution, enabling ​​>500 Wh/kg​​ energy density and ​​>1,000 cycles​​ lifespan.

Material Advantages​​

1. ​​Dendrite-Free Lithium Deposition​​

   • Copper foil’s lithiophilic surface (e.g., Cu₂S coating) guides uniform Li plating/stripping, eliminating dendrites.
   • Achieves ​​Coulombic efficiency >99.9%​​ in symmetric cells.

2. ​​Mechanical Robustness​​

   • Cu substrate provides tensile strength (>100 MPa), preventing electrode deformation during cycling.
   • Reduces Li volume change by ​​>80%​​ vs. pure Li foil.

3. ​​Solid-State Compatibility​​

   • Compatible with ​​Li₆PS₅Cl (sulfide)​​ and ​​LLZO (oxide)​​ solid electrolytes.
   • Low interfacial impedance (<10 Ω·cm²) after 500 cycles.

4. ​​Manufacturing Scalability​​

   • Roll-to-roll (R2R) production of ​​≤20 μm Li-Cu foils​​ via thermal evaporation or electroplating.
   • Cost: ​​$4.30/m²​​ (projected for gigafactory-scale production).

Applications​​

• ​​Solid-State Lithium Batteries​​: EV powertrains, aerospace, medical devices.
• ​​Hybrid Anodes​​: Pre-lithiated Si/C anodes with Li-Cu current collectors.
• ​​Research​​: Prototyping high-energy-density SSBs.

​​Storage​​: Argon-sealed (<0.1 ppm O₂/H₂O) at 20°C.

Key Specifications​