Interfaces in All-Solid-State Li Metal Batteries: From Fundamental Research to Practical Applications

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• All-solid-state Li-metal batteries (ASSLMBs) are recognized for their potential in next-generation energy storage, offering high energy density and improved safety.
• Commercialization of ASSLMBs is hindered by complex interfacial phenomena that significantly impact electrochemical performance and long-term durability.

Purpose of the Study:

• To provide a comprehensive overview of interfacial science in ASSLMBs, integrating fundamental research and practical advancements.
• To critically evaluate strategies for addressing interfacial challenges at the Li anode/solid-state electrolyte (SE), cathode/SE, and internal SE interfaces.

Main Methods:

• Review of fundamental studies and practical developments in ASSLMB interfacial science.
• Analysis of advanced characterization techniques and computational simulations for probing interfacial evolution.
• Evaluation of strategies to enhance safety, performance, scalability, and cost-effectiveness.

Main Results:

• Identification of key interfacial challenges in ASSLMBs, including Li anode/SE, cathode/SE, and internal SE interfaces.
• Assessment of various strategies to mitigate these challenges and improve battery performance.
• Highlighting progress in safety, electrochemical performance, scalability, and cost-effectiveness from an interface-centered perspective.

Conclusions:

• Understanding and controlling interfacial phenomena are crucial for the successful commercialization of ASSLMBs.
• Advanced characterization and simulation tools are essential for diagnosing and understanding interfacial evolution.
• Bridging the gap between laboratory research and real-world applications requires an integrated interface-centered approach.