Electrochemical and Structural Analysis in All-Solid-State Lithium Batteries by Analytical Electron Microscopy:...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Advanced scanning transmission electron microscopy (STEM) is crucial for characterizing all-solid-state (ASS) lithium batteries at the nanoscale.
• In situ STEM techniques provide insights into interfacial dynamics and heterogeneity during battery cycling.
• Light elements like lithium and oxygen in battery interphases are beam-sensitive, posing challenges for high-resolution analysis.

Purpose of the Study:

• To review the contributions of advanced STEM to ASS lithium battery research.
• To identify current challenges in applying STEM for interfacial analysis in ASS lithium batteries.
• To explore opportunities for combining cryo-electron microscopy with STEM phase contrast imaging.

Main Methods:

• Utilizing advanced scanning transmission electron microscopy (STEM) for nanoscale characterization.
• Employing in situ techniques to observe dynamic interfacial behavior.
• Investigating cryo-electron microscopy and STEM phase contrast imaging for overcoming beam damage.

Main Results:

• STEM provides detailed localized information on structure, morphology, chemistry, and electronic states.
• In situ studies reveal dynamic interfacial behavior and heterogeneity.
• Beam sensitivity of light elements like Li and O presents a significant obstacle.

Conclusions:

• Advanced STEM has significantly advanced ASS lithium battery characterization.
• Overcoming beam damage for interfacial studies remains a key challenge.
• Combining cryo-EM with STEM phase contrast imaging presents a promising future direction.