April 22 - 26, 2024
Seattle, Washington
May 7 - 9, 2024 (Virtual)
Symposium Supporters
2024 MRS Spring Meeting
CH04.07.01

4D-STEM Imaging of The Evolution and Performance Relevance of Microstructures in Cathode Nanoparticles

When and Where

Apr 25, 2024
8:00am - 8:30am
Room 443, Level 4, Summit

Presenter(s)

Qian Chen, University of Illinois at Urbana-Champaign

Co-Author(s)

Qian Chen1

University of Illinois at Urbana-Champaign1

Abstract

Qian Chen1

University of Illinois at Urbana-Champaign1
In this talk, I will discuss our recent efforts on utilizing four-dimensional scanning transmission electron microscopy (4D-STEM) to image the microstructures in cathode nanoparticles in rechargeable multivalent-ion batteries. We use metal oxide nanoparticles, either single-crystalline or defect-laden ones, as the cathodes, which undergo electrochemically driven phase transformation during charge and discharge cycles. The phase transformation induces the emergence of complex microstructures in the nanoparticles, such as phase orientation domains, domain boundaries, and defects such as stacking faults and dislocations. These microstructures ultimately change the energy barriers associated with ion diffusivity, the capacity, and cyclability of the battery systems. Our work demonstrates the prospect of “microstructure” engineering in energy storage materials, where spatiotemporal heterogeneity from the atomic to the nanoscale can impact macroscopic performances.

Keywords

phase transformation | transmission electron microscopy (TEM)

Symposium Organizers

Yuzi Liu, Argonne National Laboratory
Michelle Mejía, Dow Chemical Co
Yang Yang, Brookhaven National Laboratory
Xingchen Ye, Indiana University

Session Chairs

Qian Chen
Yuzi Liu
Judith Yang

In this Session