Challenges and Strategies of NASICON-Type Solid-State Electrolytes for High-Performance Lithium Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Solid-State Chemistry

Background:

• All-solid-state batteries (ASSBs) are promising for next-generation energy storage due to safety and energy density.
• Key challenges hindering ASSB deployment include interfacial issues, dendrite growth, and poor performance.
• Limited ionic conductivity of solid electrolytes is a primary constraint on battery performance.

Purpose of the Study:

• To review recent strategies for improving NASICON-type solid electrolytes.
• To analyze the mechanisms, effects, advantages, and disadvantages of these strategies.
• To provide guidance for developing high-performance, stable NASICON-type solid electrolytes.

Main Methods:

• Discusses element doping, synthesis methods, sintering additives, and densification for ionic conductivity enhancement.
• Summarizes inorganic protective layers, composite electrolytes, and hot-forming techniques for interfacial stability.
• Evaluates the advantages, disadvantages, and development potential of various approaches.

Main Results:

• Element doping, optimized synthesis, and densification can significantly improve ionic conductivity.
• Protective layers and composite electrolytes effectively mitigate interfacial instability.
• Hot-pressing and hot-forming techniques enhance interfacial contact and stability.

Conclusions:

• Addressing ionic conductivity and interfacial stability is crucial for high-performance NASICON-type ASSBs.
• A combination of material design and processing techniques is necessary for optimal results.
• This review offers theoretical and practical insights for future ASSB development.