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Towards lithium-free solid-state batteries with nanoscale Ag/Cu sputtered bilayer electrodes
Lorenzo Fallarino1, Uzair Naveed Chishti1, Arianna Pesce1
1Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein 48, Vitoria-Gasteiz 01510, Spain. plopez@cicenergigune.com.
Chemical Communications (Cambridge, England)
|September 28, 2023
Summary
This study introduces a novel nanoscale material design for lithium-free solid-state batteries. Nanometric Ag-Cu bilayers on LLZO electrolyte enable stable, reversible lithium cycling without external pressure.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Solid-state batteries offer enhanced safety over conventional lithium-ion batteries.
- Achieving efficient and reversible lithium deposition is crucial for solid-state battery performance.
- Current methods often require high pressures or complex interfaces.
Purpose of the Study:
- To develop a "Li-free" solid-state battery with enhanced reversible lithium deposition.
- To investigate the use of nanoscale material design for stable cycling.
- To explore the compatibility of new interfaces with lithium garnet electrolytes.
Main Methods:
- Utilizing nanometric Silver-Copper (Ag-Cu) bilayers directly sputtered onto Lithium Lanthanum Zirconium Oxide (LLZO) electrolyte.
- Fabricating thin film bilayers compatible with the LLZO surface.
- Conducting electrochemical cycling tests to evaluate performance.
Main Results:
- Demonstrated effective control over lithium deposition using the Ag-Cu bilayer interface.
- Achieved stable and reversible cycling of the lithium-free solid-state battery.
- The robust bilayer accommodated volume changes during cycling without external pressure.
Conclusions:
- Nanoscale Ag-Cu bilayers provide a viable pathway for enhancing reversible lithium growth in "Li-free" solid-state batteries.
- This approach offers a stable and pressure-independent cycling solution.
- The developed material design is compatible with LLZO electrolytes, paving the way for practical applications.
