We have applied the advanced scanning transmission electron microscopy and spectroscopy techniques to characterize catalysts, oxide thin film, materials for super-capacitors and electrode materials for Li-ion battery. In addition to the structural information, we are able to achieve the chemical information (composition, valence state, etc.) at sub-nano scale. Our results are essential to understand the relationship between structure/local chemistry and the property/activity in different systems, and help to improve the performance of catalysts/devices for energy convert/storage applications.
Kai He, Yongning Zhou, Peng Gao, Liping Wang, Nathalie Pereira, Glenn G Amatucci, Kyung-Wan Nam, Xiao-Qing Yang, Yimei Zhu, Feng Wang, Dong Su, Sodiation via Heterogeneous Disproportionation in FeF2 Electrodes for Sodium-Ion Batteries, ACS Nano, 8 (7), pp 7251–7259 (2014)
Xin Li, Xiaohua Ma, Dong Su, Lei Liu, Robin Chisnell, Shyue Ping Ong, Hailong Chen, Alexandra Toumar, Juan-Carlos Idrobo, Yuechuan Lei, Jianming Bai, Feng Wang, Jeffrey W Lynn, Young S Lee, Gerbrand Ceder, Direct visualization of the Jahn–Teller effect coupled to Na ordering in Na5/8MnO2, Nature Materials,13, 586–592(2014)
D. Su, F. Wang, C. Ma, N. Jiang, Engineering Nano-Composite Li4Ti5O12 Anodes via Scanning Electron-Probe Fabrication, Nano Energy, 2 (3), 343-350 (2013)
D. Su, Q. Meng, M.-G. Han, C. A. F. Vaz, Y. Segal, F. J. Walker, M. Sawicki, C. Broadbridge, and C. H. Ahn, Origin of 90o Domain Wall Pinning in Pb(Zr0.2Ti0.8)O3 Heteroepitaxial Thin Films, Applied Physical Letters, 99, 102902, (2011)
K. Gong, D. Su, R. R. Adzic, Platinum-Monolayer Shell on AuNi0.5Fe Nanoparticle Core Electrocatalyst with High Activity and Stability for the Oxygen Reduction Reaction, J. Am. Chem. Soc.,132, 14364(2010)