About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior at the Nanoscale VI
|
Presentation Title |
Nanoscale Characterization of Electrochemical-mechanical Mechanisms with Electron Microscopy |
Author(s) |
Katherine Jungjohann, Daniel Long, Katharine Harrison, Laura Merrill, Zach Milne, Khalid Hattar |
On-Site Speaker (Planned) |
Katherine Jungjohann |
Abstract Scope |
In-situ scanning/transmission electron microscopy (S/TEM) and cryogenic electron microscopy are being used to explore nanoscale mechanical degradation and failure in electrochemical systems. The combination of environmental reactions with mechanical stress dictates the electrode performance, commonly used for Li-ion batteries. The mechanical effects span the battery cell from the electrode/electrolyte interfaces through the polymeric separator. This presentation will cover the use of cryogenic electron microscopy to study the nanoscale mechanical response of lithium electrodes after charge cycling under varied pressures and at different rates. In addition, we have been developing a microelectromechanical system (MEMS) platform for in-situ S/TEM observation of the electrode response to applied tension during electrochemical cycling. Progress on these two topics will be discussed, including opportunities and limitations for each beyond energy storage systems. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Energy Conversion and Storage, Environmental Effects |