Interface Crystallographic Optimization of Crystal Plane for Stable Metallic Lithium Anode.

Area of Science:

• Materials Science
• Electrochemistry
• Battery Technology

Background:

• Lithium metal anodes are ideal for rechargeable batteries due to their high energy density.
• Key challenges include uneven interface kinetics and lithium dendrite growth, hindering practical application.
• Existing solutions often struggle with stability and efficiency.

Purpose of the Study:

• To address limitations of lithium metal anodes by developing an interface crystallographic optimization strategy.
• To design a stable and efficient lithium metal anode with enhanced interface kinetics and suppressed dendrite formation.

Main Methods:

• Applied a customized magnetron sputtering technique to deposit a preferred orientation copper (Cu) coating on a current collector.
• Investigated the crystallographic matching between the sputtered Cu layer and lithium metal.
• Evaluated the electrochemical performance of the modified anode in commercial carbonate electrolytes.

Main Results:

• The sputtered Cu layer demonstrated stability against reactive lithium metal, creating a lithiophilic surface.
• Achieved promoted interface kinetics due to perfect interface-crystal plane matching between Cu and Li.
• The dendrite-free Li anode exhibited stable interface kinetics and a lifespan of 200 cycles during plating/stripping.

Conclusions:

• Interface crystallographic optimization using a preferred orientation copper coating is a promising strategy for stable lithium metal anodes.
• This approach enhances interface kinetics and suppresses dendrite growth, leading to improved battery cycle life.
• The findings offer valuable insights for designing advanced alkali metal anodes (Li, Na, K, Zn, Mg, Al).