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​

GUANGDONG XWELL TECHNOLOGY CO., LTD. is a high-tech enterprise specializing in intelligent equipment design, production and sales, providing mechanical engineering technology design and consulting services, electronic engineering design and consulting services. XWELL's core team was established in 2010 and officially established in June 2014. XWELL relies on South China University of Technology(SCUT), and the core team is composed of several doctors and masters from SCUT.

XWELL's main products are battery production line machines, such as spot welding machine, battery sorting machine, battery sticking machine, battery capacity grading machine, battery charge and discharge aging machine, battery general testing machine, and so on. The main application areas are new energy lithium batteries, automobiles and other industries, Especially in the fields of new energy, automotive wiring welding and other fields, XWELL has accumulated rich engineering experience and mastered a full set of core technologies, and can provide customers with a complete set of services from technology to equipment, helping customers to establish efficient and reliable production lines in the shortest time .