katherine jungjohann

Katherine Jungjohann

Group Research Manager III-Materials Science


Katherine Jungjohann is a group manager at NREL. She joined NREL in 2021, after starting her career within the U.S. Department of Energy’s Nanoscale Science Research Centers, including the Center for Integrated Nanotechnologies and the Center for Functional Nanomaterials. Her research began with liquid-cell scanning/transmission electron microscopy (S/TEM) of nanoparticle synthesis and catalytic nanoparticles. During her tenure at Sandia National Laboratories, she worked heavily on lithium metal anode characterization using in situ electrochemical S/TEM and cryogenic electron microscopy methods. In addition, she led the development of a microelectromechanical system (MEMS) device fabrication to advance in situ S/TEM capabilities, which resulted in a patent. Jungjohann has supported research on an array of user projects that required in situ S/TEM (electrical biasing, electrochemistry, heating, heating in liquids, and cryogenic, straining, and environmental TEM). She now supports her group’s role in providing advanced analytical microscopy and imaging characterization to NREL and NREL’s collaborators.

Research Interests

In situ scanning/transmission electron microscopy

Clean energy degradation mechanisms

Solid-liquid interfacial reactions in energy storage and corrosion


Ph.D., Materials Science and Engineering, University of California, Davis

B.S., Chemistry, University of Redlands

Professional Experience

Group Manager, National Renewable Energy Laboratory (2021–present)

Thrust Lead, In-Situ Characterization and Nanomechanics, Center for Integrated Nanotechnologies (2019–2021)

Research Scientist, Sandia National Laboratories (2013–2021)

Postdoctoral Fellow, Brookhaven National Laboratory (2012–2013)

Associations and Memberships

Chair, Focused Interest Group on Electron Microscopy in Liquids and Gases, Microscopy Society of America

Member, The Minerals, Metals & Materials Society

Member, Materials Research Society

Featured Work

Cryogenic Laser Ablation Reveals Short-Circuit Mechanism in Lithium Metal Batteries, ACS Energy Letters (2021)

Effects of Applied Interfacial Pressure on Li-Metal Cycling Performance and Morphology in 4M LiFSI in DME, ACS Applied Materials & Interfaces (2021)

Uncovering the Relationship Between Aging and Cycling on Lithium Metal Battery Self-Discharge, ACS Applied Energy Materials (2021)

Degradation-Resistant TiO2@Sn Anodes for High-Capacity Lithium-Ion Batteries, Journal of Materials Science (2021)

Possibility of an Integrated Transmission Electron Microscope: Enabling Complex In-Situ Experiments, Journal of Materials Science (2021)

Localized Corrosion of Low-Carbon Steel at the Nanoscale, npj Materials Degradation (2019)

Cryogenic Specimens for Nanoscale Characterization of Solid-Liquid Interfaces, MRS Bulletin (2019)

Advanced Microelectromechanical Systems-Based Nanomechanical Testing: Beyond Stress and Strain Measurements, MRS Bulletin (2019)

Lithium Self-Discharge and Its Prevention: Direct Visualization Through In Situ Electrochemical Scanning Transmission Electron Microscopy, ACS Nano (2017)

In Situ and Operando, Transmission Electron Microscopy (2016)


Integrated Transmission Electron Microscope, U.S. Patent App. 17/035,267 (2021)

Mechanical Interfacial Control of Lithium Metal Anodes, U.S. Patent App. 16/782,591 (2020)

Active Mechanical-Environmental-Thermal MEMS Device for Nanoscale Characterization, U.S. Patent No. 10,641,733 (2020)

Awards and Honors

Placement Office Service Award, Microscopy Society of America (2020)

Up and Coming Innovator Award, Sandia National Laboratories (2018)

Best Instrumentation/Software Development Paper, Microscopy and Microanalysis (2012)