Yokohama National University, Japan

报告摘要：

Ni-enriched layered materials, such as stoichiometric LiNiO₂, are promising electrode materials for Li-ion batteries (LIBs) but suffer from capacity loss at high voltages and Ni ion migration. Recent advancements address these issues through non-stoichiometry and anti-site defect engineering without metal substitution. For cost-effective electric vehicles, Co-/Ni-free Mn-based positive electrode materials are being explored. Recently, nanostructured LiMnO₂ with high-energy density (~800 Wh/kg) is successfully synthesized by using a conventional calcination reaction, offering potential for economical applications. Solid electrolytes are crucial for safe, high-energy LIBs, but maintaining a stable interface with electrode materials during cycling is challenging. Innovations include nanostructured cation-disordered rocksalt oxides that exhibit dimensional stability and excellent reversibility with solid electrolytes. Sodium-ion batteries represent an attractive alternative to LIBs, particularly Mn-based layered oxides, despite challenges with Mn ion dissolution. Recent research has shown progress in enhancing the reversibility of Mn-based oxides. From these results, the importance of nano-structured lithium insertion materials for practical Li/Na-ion battery applications is discussed.

报告人简介：

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 study on reaction mechanisms for high energy Li/Na batteries. He has over 130 publications in these areas. 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.

联系人：陆雅翔（82649845，yxlu@iphy.ac.cn）

本次活动由中国科学院物理研究所青促会小组主办