Presentation Title: Research Progress on the Intergrown Cathode Materials for High-Performance Lithium-Ion Batteries

Abstract: 

    The rapid development of emerging strategic industries such as portable devices, electric vehicles, and large-scale energy storage urgently requires the development of high-energy-density, long-life, and low-cost rechargeable battery technologies, which relies on the development of high-performance battery materials. Lithium-rich manganese-based cathode materials for lithium-ion batteries have always faced the dilemma of simultaneously achieving high specific capacity and high structural stability. This report, based on structural optimization of lithium-rich materials, proposes the concept of polycrystalline intergrown structures. This presentation reports recent progress of our group in the design and preparation of bulk layered/rock-salt intergrown cathodes and multi-scale bulk/surface layered/rock-salt intergrown cathodes. The presentation will elucidate the crucial role of niobium in material structure design and regulation, and reveals the stabilization mechanism of niobium on material interfaces and electrochemical performance by using advanced characterization methods such as synchrotron radiation. This opens up new research directions and broad prospects for the design and modification of high-performance electrode materials for next-generation high-capacity, long-life rechargeable batteries.

Biography: 

       Li Yongjian, Postdoctoral Fellow, School of Materials Science and Engineering, Beijing Institute of Technology. He also serves as the Person‑in‑Charge for Industrial Application of Li‑rich Mn‑based Cathode Materials at the Chongqing Innovation Center of Beijing Institute of Technology. His research focuses on the development of multi‑spectroscopic combined characterization techniques including synchrotron radiation and neutron source, as well as their applications in structural modulation and engineering implementation of cathode materials for lithium‑ion batteries. As first or corresponding author, he has published more than 20 papers in journals such as eScience, Advanced Functional Materials, and Energy Storage Materials. He has filed over 10 invention patents, among which 2 have been granted. He serves as a Youth Editorial Board Member for journals including Element. He presides over the Youth Project of Beijing Natural Science Foundation and participates in National Key R&D Program projects.