Research.

Our research focuses on the use of electron, ion, and X-ray microscopy methods to characterize materials relevant to the energy transition — solar fuels, batteries, catalysis, and energy-efficient electronics.

Area 01

Battery materials & architectures

We study how cathode particles, solid-state electrolytes, and interfaces evolve across hundreds of cycles. Using cryo-STEM, 4D-STEM, and time-of-flight secondary ion mass spectrometry, we connect atomic-scale chemistry to cell-level performance.

  • Cation migration & phase evolution in layered oxides
  • Solid electrolyte interphase formation and failure
  • Lithium-metal plating and dendrite nucleation
DOE Office of ScienceBattery500 ConsortiumArgonne NL
STEM-EELS mapping of lithium, lithium hydride, and SEI in a lithium-metal battery anode
Area 02

Catalytic nanomaterials

How do nanoparticle catalysts restructure under reaction conditions? We develop gas- and liquid-cell microscopy to watch active sites form, migrate, and deactivate in real time.

  • CO₂ reduction on Cu-based alloys
  • Homogeneous catalysts for solar fuels
  • Hydrogen-evolution electrocatalysts
CHASE EFRCBrookhaven NLUNC Chapel HillYale
HAADF-STEM image of Pt single atoms and clusters on an anatase TiO2 support
Area 03

Energy-efficient electronics

Wide-bandgap semiconductors and ferroelectric materials offer dramatic efficiency gains. We image polarization, strain, and composition across working devices.

  • Structure and strain in AlScN-based ferroelectrics
  • Polarization dynamics in HfO₂-based ferroelectrics
  • 2D material integration for low-power logic
EELS map of a Ga-doped AlScN ferroelectric thin-film device cross-section
Cross-cutting

Technique development runs through all of it.

Every research area feeds — and is fed by — new measurement capabilities. These methods let us watch atoms, ions, and electrons do their work in realistic environments.

Method 01

Operando gas-cell (S)TEM

Microreactor holders that combine electron imaging with mass-spec product analysis — catalysis under real reaction conditions, at the atomic scale.

Method 02

Cryogenic STEM & 4D-STEM

Low-dose, low-temperature workflows for beam-sensitive battery interfaces, polymer electrolytes, and hybrid perovskites.

Method 03

Liquid-cell electrochemistry

In-situ cells for watching nanoparticle growth, corrosion, and plating at electrode–electrolyte interfaces in near-native conditions.

Method 04

Correlative X-ray & electron microscopy

Co-registered synchrotron and lab-scale measurements — bulk statistics on the same volumes we later image at the atomic scale.

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