Gain in-depth insight into the imaging fundamentals during electron-matter interactions, and develop innovative multi-dimensional super-resolution TEM and STEM imaging techniques breaking the intrinsic resolution limit of electron microscopes. Centering on multi-dimensional correlations among time, space and energy, this work focuses on the intrinsic correlations between light-element (H, C, N, O) atomic coordination, chemical composition, dynamic structural evolution and energy storage/conversion in functional and energy materials, so as to precisely unravel the structure-performance relationships of materials.

Recently, we achieved two important progresses:

1) We developed a world-first super-resolution TEM imaging technique—with a resolution of 14 picometers. It enables frontier researches including hydrogenation mechanisms of hydrogen-containing functional materials with temporal resolution of tens of milliseconds and energy resolution of hundreds of meV simultaneously.

2) We mastered electron ptychography 3D imaging technology, which supports super-resolution investigations on the bulk phase, interfaces and microstructures of energy and information functional materials in three dimensions.