Solid Electrolyte Interphase Architecture for a Stable Li-electrolyte Interface

Area of Science:

• Materials Science
• Electrochemistry
• Battery Technology

Background:

• Lithium metal anodes offer high theoretical capacity, making them ideal for next-generation batteries.
• Commercialization is hindered by lithium dendrite formation and electrolyte side reactions.
• An optimized solid electrolyte interphase (SEI) is crucial for stable lithium metal battery operation.

Purpose of the Study:

• To review strategies for artificial SEI engineering in lithium metal batteries.
• To highlight the importance of component, distribution, and structure in artificial SEI design.
• To provide perspectives for future SEI development and lithium metal battery research.

Main Methods:

• Summarizing artificial SEI fabrication strategies for both liquid and solid electrolytes.
• Analyzing the impact of SEI properties (stability, conductivity, compactness, flexibility) on performance.
• Reviewing existing literature on artificial SEI engineering.

Main Results:

• Artificial SEI can effectively suppress lithium dendrites and side reactions.
• Optimized artificial SEI exhibits enhanced stability, ionic conductivity, compactness, and flexibility.
• Careful consideration of SEI component, distribution, and structure is vital for ideal performance.

Conclusions:

• Artificial SEI engineering is a promising approach to enable high-performance lithium metal batteries.
• Further research into rational SEI design will accelerate the development of advanced energy storage solutions.
• This review provides a foundation for future advancements in lithium metal battery technology.