Prof. Naoaki Yabuuchi
1 Department of Chemistry and Life Science, Yokohama National University
2 Advanced Chemical Energy Research Center, Institute of Advanced Sciences, Yokohama National University

Hosted by the Electrochemical Energy Laboratory

Abstract: Ni-enriched layered materials, like LiNi0.8Co0.1Mn0.1O2, are widely used as positive electrode materials in Li-ion batteries for electric vehicle applications. Nevertheless, there remains an ever-growing demand for technological advancements in this field. In this presentation, recent research progress from my group is introduced: 1) A defectengineered Ni-based layered material, Li0.975Ni1.025O2, as a high-performance, Co-free positive electrode material. (Energy Storage Materials 2024, 66, 103200); 2) High-energy, Co-/Ni-free Mn-based positive electrode materials, which are targeted for costeffective electric vehicle applications. (ACS Energy Lett. 2023, 8, 2753; Adv. Energy Mater. 2024, 14, 2304074; ACS Cent. Sci. 2024, 10, 1718); 3) A vanadium-based electrode material, Li8/7Ti2/7V4/7O2, with a dimensionally invariable character, developed for practical all solid-state battery applications under low stack pressure. (Nat. Mater. 2023, 22, 225); 4) The development of Na insertion materials composed of Earth-abundant elements for Na-ion batteries as a cost-effective and complementary system to Li-ion
batteries. (Energy Mater. Adv. 2021, 2021, 9857563; Chem. Commun. 2025, 61, 338; Adv. Funct. Mater., DOI: 10.1002/adfm.202417830). Based on these results, our material design strategies and the future development of Li/Na insertion materials for advanced and practical battery applications are discussed.

Biography: Biography: Naoaki Yabuuchi is a professor at Yokohama National University. He completed his PhD at Osaka City University in 2006 and his postdoc at MIT, with research expertise in the development of new electrode materials and studies on reaction mechanisms for high-energy Li/Na batteries. He is a fellow of the Royal Society of Chemistry and an associated editor of Energy Storage Materials. He is the recipient of First International Award, “Science Award Electrochemistry” by Volkswagen and BASF, The 2nd ISSI Young Scientist Award, and ISE Prize for Applied Electrochemistry, The Periodic Table of Younger Chemists (Niobium) from The International Union of Pure and Applied Chemistry (IUPAC) among other honors.