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In-situ x-ray photoelectron spectroscopy of fuel cell reactions.

The Chueh group in lab, August 2015.

X-ray absorption spectromicroscopy showing heterogeneous lithiation in battery particles.

Custom chamber for in-situ surface x-ray diffraction.

Tahoe retreat, January 2015.

The Chueh Group explores efficient electrochemical routes for converting solar energy to chemical fuels and subsequently to electricity. The group also develops next-generation electrochemical energy storage materials.


We take a rational approach towards materials discovery and optimization. Using powerful electron, X-ray, and optical microscopy and spectroscopy techniques, we visualize electrochemical reactions as they take place on length scales ranging from tens of microns down to sub-nm. These fundamental observations, combined with atomistic- and continuum-level models, lead to new insights into the design of functional materials with novel compositions and structures. We utilize a wide range of solution, vapor, and solid-state routes to create high-performance electrochemical devices, such as photo-electrochemical cells, fuel cells, electrolyzers and metal-air batteries.

Highlights - see all

Mentorship opens doors to undergraduate student unraveling lithiation pathways in heterogeneous battery electrodes

Understanding the reaction pathway and rate-limiting steps in ceria-based fuel cells and electrolyzers

Unusual many-particle effects in phase-separating battery electrodes revealed by local current density mapping