A microscopic view of solid-state lithium batteries.

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Growing demand for safe, high-energy-density storage solutions.
• Limitations of conventional lithium-ion batteries necessitate advanced alternatives.
• Solid-state batteries (SSBs) offer superior safety and energy density but face interface challenges.

Purpose of the Study:

• To review micro- and nanoscale characterization techniques for diagnosing SSB degradation.
• To explore how these techniques can guide the development of improved SSB materials and architectures.
• To provide insights into interfacial processes crucial for SSB performance and durability.

Main Methods:

• Survey of existing research on SSB materials and degradation phenomena.
• Examination of advanced micro- and nanoscale characterization techniques.
• Focus on specific degradation mechanisms: grain boundaries, dendrites, interphases, heterogeneities, and contact loss.

Main Results:

• Characterization techniques are vital for understanding interfacial processes in SSBs.
• Key degradation modes include dendrite formation, unstable interfaces, and material heterogeneities.
• Insights from characterization can inform strategies to mitigate degradation and enhance performance.

Conclusions:

• Advanced characterization is essential for unlocking the full potential of solid-state batteries.
• Further development of characterization methods will deepen understanding of SSB operation and degradation.
• This knowledge is critical for designing more durable and efficient solid-state energy storage systems.