Fiber separators: optimizing bulk and interface behaviors in high energy batteries

Area of Science:

• Materials Science
• Electrochemistry
• Battery Technology

Background:

• High energy density batteries require advanced separators, critical inactive components.
• Reducing separator thickness is a strategy to increase battery energy density.
• Separator mechanical properties pose challenges for thinner designs, risking dendrite penetration and interfacial stress.

Purpose of the Study:

• To systematically review the interaction mechanisms of fiber separators within batteries.
• To elucidate the role of fiber separators in tuning ion solvation and solid electrolyte interphase formation.
• To highlight advanced characterization and simulation methods for addressing separator challenges in high energy density batteries.

Main Methods:

• Systematic literature review of fiber separator interactions.
• Analysis of mechanisms influencing ion solvation structures.
• Examination of methods for promoting stable solid electrolyte interphase (SEI) formation.
• Review of advanced characterization and multi-scale simulation techniques.

Main Results:

• Fiber separators play a crucial role in tuning ion solvation structures.
• They promote the formation of a stable solid electrolyte interphase (SEI).
• Advanced fiber separator designs can mitigate dynamic interfacial stress.

Conclusions:

• Meticulous fiber separator design is essential for enhancing high energy density battery performance.
• Understanding separator-bulk and separator-interface interactions is vital.
• Advanced characterization and simulation are key to overcoming current limitations and application challenges.