Tomoya Kawaguchi

Research Interest

Tomoya Kawaguchi’s research focuses on the development and application of advanced synchrotron X-ray scattering techniques for studying functional materials under realistic operating conditions. His work combines operando and in situ X-ray methods with materials science and electrochemistry to investigate structural evolution, strain, and dynamic processes in energy materials, catalysts, and complex oxide systems.

His research interests include coherent diffraction imaging, X-ray photon correlation spectroscopy (XPCS), resonant X-ray scattering, diffraction anomalous fine structure (DAFS), and other coherent scattering approaches enabled by fourth-generation synchrotron sources. He has applied these methods to rechargeable battery materials, catalytic alloy nanoparticles, and oxide interfaces.

At the upgraded Advanced Photon Source (APS), his research aims to utilize the significantly enhanced coherent hard X-ray flux and advanced instrumentation capabilities to enable real-time studies of nanoscale structural and dynamical phenomena relevant to materials science.

Education

• Kyoto University, Ph.D. in Materials Science and Engineering, 2015
• Kyoto University, M.S. in Materials Science and Engineering, 2012
• Kyoto University, B.S. in Engineering Science, 2010

Experience

• Argonne National Laboratory, X-ray Science Division, Staff Scientist, 2025–Present
• Tohoku University, Institute for Materials Research, Assistant Professor (Prominent Research Fellow 2023-2025), 2018–2025
• Argonne National Laboratory, Materials Science Division, Resident Associate, 2017–2019
• Kyoto University, Office of Society-Academia Collaboration for Innovation, Research Assistant Professor, 2015–2017

Selected Publications

1. T. Kawaguchi, V. Komanicky, V. Latyshev, W. Cha, E. R. Maxey, R. Harder, T. Ichitsubo, and H. You, Electrochemically Induced Strain Evolution in Pt–Ni Alloy Nanoparticles Observed by Bragg Coherent Diffraction Imaging, Nano Letters 21, 2021
2. T. Kawaguchi, T. F. Keller, H. Runge, L. Gelisio, C. Seitz, Y. Y. Kim, E. R. Maxey, W. Cha, A. Ulvestad, S. O. Hruszkewycz, R. Harder, I. A. Vartanyants, A. Stierle, and H. You, Gas-Induced Segregation in Pt-Rh Alloy Nanoparticles Observed by In Situ Bragg Coherent Diffraction Imaging, Physical Review Letters 123, 2019
3. . Y. Chung, P. P. Lopes, P. F. B. D. Martins, H. He, T. Kawaguchi, P. Zapol, H. You, D. Tripkovic, D. Strmcnik, Y. Zhu, S. Seifert, S. Lee, V. R. Stamenkovic, and N. M. Markovic, Dynamic stability of active sites in hydr(oxy)oxides for the oxygen evolution reaction, Nature Energy 5, 222–230 (2020)
4. T. Kawaguchi, H. Sakurai, S. Fukui, X. Ye, H. Li, T. Mandai, N. L. Okamoto, and T. Ichitsubo, Amorphous oxide cathode enabling room-temperature rechargeable magnesium batteries, Communications Materials (2025)
5. T. Kawaguchi, N. Nemoto, H. Sakurai, N. L. Okamoto, and T. Ichitsubo, Utilization of Delithiation-Induced Amorphous Oxide as a Cathode for Rechargeable Magnesium Batteries, Chemistry of Materials 36, 2024
6. T. Kawaguchi, M. Yasuda, N. Nemoto, K. Shimokawa, H. Li, N. L. Okamoto, and T. Ichitsubo, Securing cation vacancies to enable reversible Mg insertion/extraction in rocksalt oxides, Journal of Materials Chemistry A 12, 2024
7. T. Kawaguchi, X. Bian, T. Hatakeyama, H. Li, and T. Ichitsubo, Influences of Enhanced Entropy in Layered Rocksalt Oxide Cathodes for Lithium-Ion Batteries, ACS Applied Energy Materials 5, 2022
8. T. Kawaguchi, Y. Liu, A. Reiter, C. Cammarota, M. S. Pierce, and H. You, Direct determination of one-dimensional interphase structures using normalized crystal truncation rod analysis, Journal of Applied Crystallography 51, 2018
9. T. Kawaguchi, K. Fukuda, K. Tokuda, K. Shimada, T. Ichitsubo, M. Oishi, J. Mizuki, and E. Matsubara, Revisit to diffraction anomalous fine structure, Journal of Synchrotron Radiation 21, 2014