报告人: Dr. Xiulei Ji, Oregon State University
会议ID：804 596 058，
Abstract: The battery research community is at the crossroads to shift to a new paradigm of storage batteries. The primary evaluation metrics of storage batteries are the levelized energy cost and safety, which provides the leeway for the design of diverse battery chemistries. In this talk, I will describe five dimensions of considerations for investigating storage battery chemistries, which is from a chemical reaction’s point of view. Electrode materials and ion charge carriers are the reactants; electrolytes are the reaction medium; battery configurations describe the reactors. It is pivotal to recognize that electrode-ion chemical bonding reveals the nature of the reaction. The permutations of these five dimensions result in ten unique research sectors. For Li-ion batteries or Na-ion batteries, the electrode-ion interactions are largely taken as purely ionic; nevertheless, the electrode-ion interactions may be of much donor-acceptor covalency when charge carriers carry anti-bonding orbitals. Covalent-ionic bonding brings implications of kinetic and thermodynamic behaviors in batteries. The understanding of the bonding chemistry in the dynamic redox environments represents the nexus to engender a constellation of novel solutions. The design of storage batteries entails a holistic view with these five dimensions considered. The chemical-reaction nature of batteries can be a vantage that unifies rather than compartmentalizes a new paradigm of storage battery research.
Prof. Xiulei (David) Ji graduated from Jilin University with a B.Sc. in chemistry in 2003. He obtained his Ph.D. degree from the University of Waterloo in 2009. He was an NSERC Postdoctoral Fellow at the University of California, Santa Barbara from 2010 to 2012. Dr. Ji is currently an Associate Professor at the Department of Chemistry, Oregon State University. He has published more than 120 articles in journals, including Nature Materials, Nature Chemistry, Nature Energy, J. Am. Chem. Soc., and Angew. Chem. Int. Ed. and the citations are more than 16,600 (Google Scholar).