In Situ TEM Characterization of Battery Materials.

Area of Science:

• Materials Science
• Electrochemistry
• Analytical Chemistry

Background:

• Transmission electron microscopy (TEM) is crucial for atomic-level materials analysis.
• In situ TEM enables observation of dynamic material transformations under stimuli.
• Advanced in situ TEM can mimic battery operating conditions for nanoscale analysis.

Purpose of the Study:

• To review the application of in situ TEM in battery materials research.
• To cover various in situ TEM sample cell configurations and approaches (open/closed cell).
• To discuss in situ TEM studies for lithium, sodium, and other battery chemistries.

Main Methods:

• Review of historical development of electron microscopy and battery research.
• Detailed examination of various in situ TEM sample cell designs.
• Comprehensive analysis of published in situ TEM studies on battery materials.

Main Results:

• In situ TEM provides unique insights into beam-sensitive, air-sensitive, or light-element battery materials.
• It reveals nanoscale changes in electrodes, interfaces, and electrolytes during battery operation.
• The technique is applicable to various battery chemistries beyond lithium-ion.

Conclusions:

• In situ TEM is an indispensable tool for understanding battery material dynamics.
• Further advancements in sample preparation and imaging conditions are needed.
• Enhanced collaboration between in situ TEM and battery research communities is vital for progress.