SKM 2023 – wissenschaftliches Programm

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TUT: Tutorien

TUT 4: Strategic elements and sustainability (joint session MA/TUT)

TUT 4.1: Hauptvortrag

Sonntag, 26. März 2023, 16:00–16:30, HSZ 04

Making better batteries? -- From Li-ion to Na-ion batteries — •Philipp Adelhelm — Humboldt-University Berlin, Berlin, Germany — Helmholtz-Zentrum Berlin, Berlin, Germany

The shift to electromobility is one of the most important transformations currently taking place in our society. This is associated with a sharp increase in battery production, which on the one hand opens up new opportunities, but on the other hand also has a massive impact on raw material supply and supply chains. In addition, new large markets are emerging, such as stationary energy supply or mobile robotics. Lithium-ion batteries are currently the most attractive technology for this. However, due to the large demand for batteries and the different application scenarios, other technologies are also being pursued. Sodium ion batteries can be produced on the same production lines as lithium ion batteries and are therefore considered a "drop-in" technology. The aim here is to replace not only costly lithium but also other expensive elements such as nickel or copper. Work is therefore being done worldwide on a cell chemistry for sodium ion batteries that works almost as well as lithium ion technology, but at the same time is cheaper and more readily available, or has other specific advantages. The tutorial gives an introduction to sodium ion technology. The motivation and state-of-the art are explained in more detail and material aspects are discussed. In particular, the question is addressed which electrode materials are promising for sodium ion batteries, what is needed to achieve further progress and what actually happens when lithium ions are replaced by sodium ions in a battery.