Research Progress on Nitride Solid-State Electrolytes
Research Seminar Series
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Date
03 Jun 2026
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Organiser
Department of Industrial and Systems Engineering, PolyU
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Time
16:30 - 17:30
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Venue
BC404
Speaker
Prof. Weihan Li
Remarks
If you have enquiries regarding E-certificate after the seminar, please contact david.kuo@polyu.edu.hk.
Summary
Interfacial instability between solid-state electrolytes and lithium metal, together with limited lithium-ion transport, remains a major challenge for high-performance all-solid-state lithium metal batteries. This presentation reports the design of nitride solid-state electrolytes guided by reaction thermodynamic stability theory, aiming to achieve both strong lithium compatibility and high ionic conductivity. By introducing a cooperative Li/N vacancy regulation strategy, vacancy-rich Li9N2Cl3 and β-Li3N electrolytes were developed, significantly reducing lithium-ion migration barriers and increasing carrier concentration. Their room-temperature ionic conductivity was enhanced by 40–100 times, reaching 2.14 mS/cm. Advanced diffraction, spectroscopy, tomography, and molecular dynamics simulations clarified the relationship between vacancy structure, ion transport, and interfacial stability. The optimized electrolytes enabled stable lithium plating/stripping and full-cell cycling for 5,000 cycles at 1C, with fast charging and high areal capacity. This work highlights nitride electrolytes as promising candidates for next-generation solid-state lithium metal batteries.
Keynote Speaker
Prof. Weihan Li
Associate Professor
College of Science, Eastern Institute of Technology (EIT), Ningbo, China
Dr. Weihan Li, Recipient of National Outstanding Young Talents Programme (Overseas), Founding Associate Professor (Research Fellow and PhD Supervisor) at the Eastern Institute of Technology, Ningbo, where he also serves as Deputy Director of the Institute of Materials and Energy, Adjunct PhD Supervisor at Shanghai Jiao Tong University. His research focuses on solid-state batteries, lithium (sodium)-ion batteries, and synchrotron-based characterization, with recent original contributions to nitride solid-state electrolytes, all-solid-state battery development, and in situ synchrotron studies. He has published over 120 SCI-indexed papers in journals including Nature and Science, with more than 13,000 citations and an H-index of 68, including nearly 30 first/corresponding-author papers in leading journals such as Nature Nanotechnology, Science Advances, Advanced Materials, Energy & Environmental Science, and JACS. He was listed among the World's Top 2% Scientists (2023–2025) and has received honors including the First Prize of the Anhui Provincial Natural Science Award (2023) and Chinese Academy of Sciences Presidential Scholarship (2016).
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