Designing composite solid-state electrolytes for high performance lithium ion or lithium metal batteries

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Solid-state electrolytes (SSEs) offer potential for next-generation lithium-ion batteries (LIBs) by inhibiting lithium dendrite growth.
• However, poor room temperature ionic conductivity and interfacial instability hinder the widespread application of SSEs in LIBs.

Purpose of the Study:

• To systematically review recent advancements in composite solid-state electrolytes (CSSEs).
• To provide a comprehensive understanding of CSSE design strategies for improved ionic conductivity and interfacial stability.
• To outline ion transfer pathways and lithium dendrite growth models in composite materials.

Main Methods:

• Literature review of inorganic composite and organic-inorganic composite solid-state electrolytes.
• Comparative analysis of CSSEs against their parent materials.
• Discussion of ion transport mechanisms and dendrite inhibition models.

Main Results:

• CSSEs demonstrate superior ionic conductivity and interfacial stability compared to single SSEs.
• Different types of CSSEs exhibit unique performance characteristics based on their composition.
• Understanding ion transfer pathways is crucial for mitigating lithium dendrite formation.

Conclusions:

• CSSEs are a promising approach to overcome the limitations of traditional SSEs for advanced LIBs.
• Strategic design of CSSEs can significantly enhance battery performance and safety.
• Further research into ion transport and dendrite growth models will accelerate the development of high-performance CSSEs.