Advanced Real Time Imaging: Energy & Environment
Sponsored by: TMS Functional Materials Division, TMS: Advanced Characterization, Testing, and Simulation Committee, TMS: Alloy Phases Committee
Program Organizers: Jinichiro Nakano, MatterGreen; David Alman, National Energy Technology Laboratory; Il Sohn, Yonsei University; Hiroyuki Shibata, Tohoku University; Antoine Allanore, Massachusetts Institute of Technology; Candan Tamerler, University of Kansas; Noritaka Saito, Kyushu University; Neslihan Dogan, TU Delft; Zuotai Zhang, Southern University of Science and Technology; Bryan Webler, Carnegie Mellon University; Anna Nakano, US Department of Energy National Energy Technology Laboratory

Wednesday 2:00 PM
February 26, 2020
Room: Theater A-4
Location: San Diego Convention Ctr

Session Chair: Anna Nakano, US Department of Energy National Energy Technology Laboratory; Jinichiro Nakano, MatterGreen


2:00 PM  Invited
In-operando Non-invasive Optical Visualization of Battery Reactions and Processes: Nian Liu1; Yutong Wu1; Yamin Zhang1; 1Georgia Institute of Technology
    Battery is a chemical reactor of multiple phases, interfaces, and reactions. In recent years, imaging has become an important tool to probe fundamental mechanisms in battery and provide design guidelines. In-operando electron and X-ray imaging has been utilized to study battery materials, although vacuum environment and beam damage have raised concern on the fidelity of observation, especially when sensitive materials are involved. Optical imaging is milder, operates in ambient condition, and is easily accessible. In this presentation, I will talk about our design of in-operando cell as well as in-operando optical microscopy/spectroscopy platform to study 1) sulfur electrochemistry in Li-S battery, 2) bromine electrochemistry in Zn-Br battery, and 3) zinc electrochemistry in alkaline electrolyte. New finding and their implication on battery performance improvement will be shown. This platform we have developed is expected to be adaptable for studying other electrochemical systems.

2:20 PM  Invited
In-situ Transmission Electron Microscopy Characterization of Advanced Nuclear Materials during Single and Dual Beam Irradiation: Osman El-Atwani1; Stuart Maloy1; 1Los Alamos National Laboratory
    In-situ electron microscopy characterization techniques of nuclear materials have been vital tools assisting in the fundamental understanding of the atomistic processes which give rise to the material’s response under extreme environments. Here we present in-situ transmission electron microscopy (TEM) characterization of advanced nuclear materials and their dynamic response to extreme irradiation conditions. Several material examples will be discussed including nanocrystalline materials and alloys. The advantages of the use of in-situ TEM techniques to solve nuclear materials problems and to fundamentally understand different and complex materials responses to various extreme irradiation environments (including dual beams) will be presented.

2:40 PM  
In-operando Investigation on Sequential Stages for Redox-triggered Phase Transformation of Natural Hematite Particles: Anna Nakano1; Jinichiro Nakano1; James Bennett2; 1U.S. Department of Energy National Energy Technology Laboratory/ Leidos Research Support Team; 2US Department of Energy National Energy Technology Laboratory
    Chemical looping combustion (CLC) is an alternative concept being explored to generate energy while enabling the high efficiency capture of CO2 as a process byproduct. In CLC process, oxygen carriers are typically subjected to repeated redox environments to exchange oxygen. Most oxygen carriers are metal-oxide based, with hematite being representative of this type. In the reducing reactor, oxygen is removed from carrier particles, while in the oxidizer, oxygen is chemically taken back within the carrier particle. On the oxygen carrier’s surface, oxygen exchange during reduction takes place first by adsorption and dissociation (ionization), followed by diffusion; while oxidation is conducted by diffusion, deionization, then desorption. In this work, timing of these stages occurring on natural hematite particles during redox-triggered phase transformations was investigated by a combined visual and “semi-calorimetric” approach using a custom-designed high temperature environmental optical microscope.

3:00 PM Concluding Comments