A Review of Solid Electrolyte Interphases on Lithium Metal Anode

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Lithium metal batteries (LMBs) offer high energy density but suffer from dendrite growth, limiting their practical use.
• The solid electrolyte interphase (SEI) is crucial for inhibiting dendrite formation and enhancing battery cycling performance.

Purpose of the Study:

• To review SEI formation mechanisms, structure models, and analysis techniques.
• To discuss factors influencing SEI properties and summarize methods for SEI modification.
• To highlight the need for advanced strategies to achieve robust SEI for efficient energy storage.

Main Methods:

• Summarization of SEI formation mechanisms and structure models.
• Emphasis on analysis methods for SEI characterization (surface chemistry, morphology, electrochemical properties).
• Comprehensive debate on factors affecting SEI formation (electrolyte, temperature, current density).

Main Results:

• SEI formation and structure are influenced by electrolyte composition, temperature, and current density.
• Various methods exist for SEI modification, including new electrolyte systems, additives, protective layers, and electrode design.
• Current approaches provide insights but lack robust, precise routes for SEI engineering.

Conclusions:

• Effective SEI engineering is critical for overcoming dendrite issues in LMBs.
• Further research is needed to establish structure-property relationships for SEI.
• A multidisciplinary approach is essential for developing advanced SEI for high-performance energy storage systems.