Speaker: Linda F. Nazar, University Professor & Canada Research Chair in Solid State Energy MaterialsUniversity of Waterloo
Title: Understanding and Enhancing Li-Ion Transport in Solids and at Interfaces for All-SolidÂState Electrochemical Energy Storage
Abstract: All-solid-state lithium-ion batteries (ASSBs) have emerged as exc1tmg alternatives to conventional liquid electrolyte cells for electrochemical energy storage, owing to their enhanced safety and higher energy densities. ASSBs are founded on high performance fast-ion conducting electrolytes, where the search for new crystalline and glassy materials materials hinges on understanding their intrinsic nature. Currently, a comprehensive knowledge of the factors that dictate facile Li-ion transport remains elusive, as does mastering the interface of the solid electrolyte with the electrode materials. The seminar will cover an overview of the state-of-the art in the field, followed by a focus on recent findings in our laboratory based on neutron scattering that are complemented by analysis using the maximum entropy method, ab initio molecular dynamics simulations and solid-state NMR studies. We correlate structure with ionic conductivity in a range of newly developed fast ion Li conductors to understand how cation disorder and a frustrated energy landscape impacts conductivity and activation energy. These considerations lead to an overarching understanding for design concepts for ion transport and electrolyte-electrode interfaces in solid state batteries, which serves as the theme of the presentation. Translation of our findings to high performance practical solid-state batteries whose high performance exceeds that of their liquid electrolyte counterparts will be introduced at the end.
via Zoom Sherri Tatum This email address is being protected from spambots. You need JavaScript enabled to view it. https://mse.umd.edu/seminar-series