Cryogenic Transmission Electron Microscopy for Battery Materials and Interphases Webinar

Lithium batteries are critical for the decarbonization of the transportation sector to address climate change. However, the deployment of improved battery chemistries is limited due to a poor understanding of the complex interfaces and structures within the battery. Most prominent among these structures is the solid-electrolyte interphase (SEI), a passivation layer that exists on the negative electrode (anode) of the battery. This SEI has been referred to as the “most important and the least understood” aspect of the battery, as it dictates the stability and cyclability of the anode, while remaining resistant to nanoscale interrogation by electron-optical methods such as transmission electron microscopy (TEM) as a result of their sensitivity to air, moisture, and electron irradiation. 

Owing to recent developments in cryogenic TEM for materials science, it becomes possible to image Li-based battery materials in the TEM without side reactions and beam damage. The chemistry and nanostructure of the SEI can now be visualized and directly correlated to battery performance, offering unprecedented insight into electrochemical behavior and aging phenomena within batteries. In this talk, William Huang will highlight his recent works using cryo-TEM to understand SEI properties and failure modes in next-generation silicon and metallic lithium anodes.

Presenter
William Huang, Materials Science and Engineering Department, Stanford University

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Thursday, October 8, 2020
8:00 am - 9:00 am