Frontiers in Theoretical Analysis of Solid Electrolyte Interphase Formation Mechanism.

Area of Science:

• Materials Science
• Electrochemistry
• Computational Chemistry

Background:

• The solid electrolyte interphase (SEI) is crucial for battery performance, affecting safety, power, and lifespan.
• SEI forms from electrolyte decomposition during initial battery charging.
• Current methods struggle to capture intermediate SEI growth stages.

Purpose of the Study:

• To elucidate the SEI layer growth mechanism.
• To provide guidelines for designing stable SEI layers.
• To overcome limitations of conventional theoretical and experimental approaches.

Main Methods:

• Review of recent theoretical advancements.
• Focus on a novel multiscale simulation method.
• Analysis of reduction product aggregation and SEI morphology influence.

Main Results:

• Multiscale simulations provide deeper insights into SEI formation.
• Understanding of how reduction products influence SEI morphology.
• Identification of key factors governing SEI growth.

Conclusions:

• Recent theoretical work, particularly multiscale simulations, has significantly advanced SEI growth mechanism understanding.
• This knowledge is vital for engineering stable SEI layers.
• Guidelines are provided for developing next-generation batteries with enhanced stability and performance.