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MM: Fachverband Metall- und Materialphysik

MM 19: Battery Materials

MM 19.1: Vortrag

Dienstag, 13. März 2018, 10:15–10:30, H 0106

Material and electrode design for sodium-ion batteries — •Yang Xu, Min Zhou, and Yong Lei — Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau, 98693, Ilmenau, Germany

Academic and industry interest in sodium-ion batteries (SIBs) has been resurrected in recent years, driven by the increasing market of electric vehicles and portable electronics. Sodium is one of the most abundant elements in the earth's crust and has similar chemical properties to lithium, indicating that sodium chemistry could be applied to a similar battery system to the Li counterpart. It is believed that cost-effective SIBs are an ideal replacement to lithium-ion batteries, but it requires further improvement of performance. We conduct our study of SIBs from a fundamental point of view, e.g., crystal structures, molecular structures and electrode structures, aiming at high capacity, cyclability and rate capability. Our material design has greatly promoted the performance of both inorganic (metals and oxides) and organic electrode materials, by controlling their atomic orderliness and utilizing defect chemistry. Our electrode design has proposed highly ordered nanoarrays as advanced electrode architectures to enhance surface ion availability, charge transport and electrode stability. We present here our recent work to demonstrate the material and electrode design, with the emphasis on metallic Sb and oxide-based anodes as well as organic carbonyl compounds. The design strategies could also be applicable in potassium-ion batteries.