News & Events
Department Events

Events

  • Apr
    17

    ME512 Seminar- Distinguished Speaker Donald Siegel

    McCormick - Mechanical Engineering (ME)

    3:00 PM LR3, Technological Institute

    EVENT DETAILS

    ME512 Seminar Series
    Distinguished Speaker

    Donald Siegel

    University of Texas at Austin

    Li metal-solid state batteries (LMSSB) require that interfacial contact between the Li metal anode and the solid electrolyte (SE) be maintained during cycling. A reduction in contact area during Li stripping increases the local current density during subsequent Li plating, fostering dendrite nucleation. The contact area is influenced by the rate of Li transport within the anode toward the interface. Relevant transport mechanisms include diffusion and creep, with faster rates of these processes resulting in improved performance. Given the importance of these transport modes, predicting them as a function of the anode’s microstructure, stress state, and temperature is helpful in the design of LMSSB.

    Here, the rates of diffusion and creep in Li are predicted using atomic-scale simulations. A primary goal is to understand if and how Li microstructure impacts the performance of LMSSB. First, molecular dynamics is used to estimate the rate of Li diffusion along dislocations and grain boundary triple junctions. By combining this data with that from a prior study of grain boundary diffusion, the dominant diffusion mechanisms and overall rates of self-diffusion in Li polycrystals are predicted as a function of grain size, grain shape, dislocation density, and temperature. A 1D continuum model for interfacial contact is parameterized using the computed diffusion data. The model predicts that high dislocation densities (~10¹²/cm²) and/or small grain sizes (~10 µm) enable achieving battery performance targets.

    Secondly, the dominant creep deformation mechanisms are predicted as a function of applied stress, grain size, and temperature. Grain boundary sliding and Coble creep are observed to be the primary mechanisms for micron-sized grains. Finally, a kinetic lattice Monte Carlo model is developed to monitor the dynamics of Li voids as a function of interfacial thermodynamics and the presence of grain boundaries.

    BIO
    Don Siegel is Professor and Chair of the Walker Department of Mechanical Engineering at the University of Texas at Austin. He also has appointments in the Oden Institute for Computational Engineering and Sciences and the Texas Materials Institute. At UT, he is a Temple Foundation Endowed Professor and holds a Cockrell Family Chair for Departmental Leadership. Prior to joining UT in 2021, Prof. Siegel spent 12 years at the University of Michigan, with earlier posts in industry (Ford Motor Company) and at national laboratories (Sandia National Laboratories and the U.S. Naval Research Laboratory). Siegel is a computational materials scientist whose research targets the development of energy storage materials and lightweight alloys. He is a recipient of the NSF CAREER Award and a Gilbreth Lectureship from the National Academy of Engineering.

    more less

    TIME Friday, April 17, 2026 at 3:00 PM - 4:00 PM

    LOCATION LR3, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Jeremy Wells    jeremywells@northwestern.edu EMAIL

    CALENDAR McCormick - Mechanical Engineering (ME)

  • Apr
    15

    Center for Synthetic Biology presents: Dario Robleto | Ancient Beacons Long for Notice

    Block Museum of Art

    3:00 PM Block Museum of Art, Mary and Leigh

    EVENT DETAILSmore info

    TIME Wednesday, April 15, 2026 at 3:00 PM - 5:00 PM

    LOCATION Block Museum of Art, Mary and Leigh    map it

    ADD TO CALENDAR

    CONTACT Block Museum of Art    block-museum@northwestern.edu EMAIL

    CALENDAR Block Museum of Art

  • Apr
    20

    ME512 Seminar- Pulkit Agrawal

    McCormick - Mechanical Engineering (ME)

    3:00 PM L211, Technological Institute

    EVENT DETAILS

    TIME Monday, April 20, 2026 at 3:00 PM - 4:00 PM

    LOCATION L211, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Jeremy Wells    jeremywells@northwestern.edu EMAIL

    CALENDAR McCormick - Mechanical Engineering (ME)

  • Apr
    22

    CRB Seminar: "The Challenges to Realize Embodied AI", Wolfram Burgard, University of Technology Nuremberg

    Center for Robotics and Biosystems (CRB)

    11:00 AM M416, Technological Institute

    EVENT DETAILSmore info

    TIME Wednesday, April 22, 2026 at 11:00 AM - 12:00 PM

    LOCATION M416, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Amy Nedoss    amy.nedoss@northwestern.edu EMAIL

    CALENDAR Center for Robotics and Biosystems (CRB)

  • Apr
    23

    TAM Seminar - Padmini Rangamani

    McCormick - Mechanical Engineering (ME)

    11:00 AM B211, Technological Institute

    EVENT DETAILS

    TIME Thursday, April 23, 2026 at 11:00 AM - 12:00 PM

    LOCATION B211, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Jeremy Wells    jeremywells@northwestern.edu EMAIL

    CALENDAR McCormick - Mechanical Engineering (ME)

  • May
    4

    ME512 Seminar- H. Jerry Qi

    McCormick - Mechanical Engineering (ME)

    3:00 PM L211, Technological Institute

    EVENT DETAILS

    TIME Monday, May 4, 2026 at 3:00 PM - 4:00 PM

    LOCATION L211, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Jeremy Wells    jeremywells@northwestern.edu EMAIL

    CALENDAR McCormick - Mechanical Engineering (ME)

  • May
    5

    Ted Belytschko Seminar- George Karniadakis

    McCormick - Mechanical Engineering (ME)

    2:00 PM 2350, Ford Motor Company Engineering Design Center

    EVENT DETAILS

    TIME Tuesday, May 5, 2026 at 2:00 PM - 3:00 PM

    LOCATION 2350, Ford Motor Company Engineering Design Center    map it

    ADD TO CALENDAR

    CONTACT Jeremy Wells    jeremywells@northwestern.edu EMAIL

    CALENDAR McCormick - Mechanical Engineering (ME)

  • May
    14

    TAM Seminar - Carlos Portela

    McCormick - Mechanical Engineering (ME)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Thursday, May 14, 2026 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

    ADD TO CALENDAR

    CONTACT Jeremy Wells    jeremywells@northwestern.edu EMAIL

    CALENDAR McCormick - Mechanical Engineering (ME)