Group_Picture







1 / 3
In inorganic-organic composite electrolytes, it is believed that an interface forms between the inorganic and organic phases. There is a major and long-term debate on ion transport pathways: Li ions can transport via organic matrix, inorganic fillers, organic-inorganic interface, or the combination of the three. Tracer-exchange NMR, developed by our group, has successfully probed Li-ion transport pathways in composite electrolytes, which combines 6Li -> 7Li isotope exchange with high-resolution 6Li NMR. The methodology and results shed light on the design, synthesis, and modification of solid electrolytes for the next-generation of Li-ion batteries.
2 / 3
1.Design and discovery of Heteroanionic materials as fast-ion conductors 2.Provide understanding of ion conduction in HAM framework 3.Establish set of guidelines governing ion transport in mixed-anion sublattice 4.Provide insights in designing structural frameworks with enhance functionality
Magnetic Resonance Image (MRI) as a non-invasive technique has been developed and applied to understand the Li redistribution and microstructure formation during the electrochemical operation. Intensity variation among those different electrochemical-treated pellets is demonstrated here based on 3D 7Li MRI. The distribution of Li ion within the solid-state electrolyte among different layers was tracked by the 2D projection of the 3D image as well as the line profile of normalized intensity at each layer. From the histogram of short-circuit LLZO image, a larger deviation confirmed the increased heterogeneity within cross-sections.

Research Interests

Our research efforts focus on developing and improving solid-state nuclear magnetic resonance (NMR) techniques to achieve enhanced detection sensitivity, improved spectral resolution, and operando characterizations. We also leverage advanced ex situ and in situ multinuclear solid-state NMR methods and the state-of-the-art facility at the National High Magnetic Field Lab (NHMFL or MagLab) for investigating structure-property correlations and elucidating reaction mechanisms (In fact, almost 50% of our research efforts are performed at the MagLab! Here is a brief introduction about what we do overthere: The Scientist & the Sample ). We aim to gain a fundamental understanding of interfacial processes that have important scientific and technological implications. Foundational knowledge gained from our research will have significant impact on developing advanced electrochemical energy conversion and storage systems, efficient heterogeneous catalysis, and compatible interfaces in composite materials.

Research Interests

Grants