Understanding and Designing Lithiophilic Alloyed Metal Anodes for Practical Metal Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Battery Technology

Background:

• Lithium metal batteries (LMBs) face challenges in manufacturability and cycling stability.
• Lithiophilic alloyed metal anodes (LAMAs) show potential to overcome these limitations.
• A quantitative framework for understanding lithiophilicity in LAMAs is currently lacking.

Purpose of the Study:

• To establish a descriptor-based paradigm for quantitatively defining and understanding lithiophilicity in LAMAs.
• To critically analyze current strategies for LAMA design and fabrication.
• To identify future research opportunities for developing industrially viable LAMAs.

Main Methods:

• Systematic review and analysis of existing literature on LAMAs.
• Development of a descriptor-based framework integrating thermodynamic, kinetic, and electronic-structure properties.
• Evaluation of temporal stability of lithiophilic interfaces.

Main Results:

• A unifying framework for elucidating lithiophilicity has been established.
• Current LAMA strategies including alloy-embedded architectures and interfacial engineering are analyzed.
• Insights into temporal stability of lithiophilic interfaces are provided.

Conclusions:

• LAMAs present a viable path towards high-energy, stable lithium metal batteries.
• Rational design principles coupling materials chemistry, interfacial science, and manufacturing are crucial.
• Further research is needed to accelerate the development and industrialization of LAMAs.