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MM: Fachverband Metall- und Materialphysik

MM 7: Materials for Storage and Conversion of Energy II (joint session MM/KFM)

MM 7.4: Talk

Monday, March 18, 2024, 12:30–12:45, C 264

Preparation of Prussian blue analogue materials and their application to sodium ion storage — •Ping Hong, Huaping Zhao, and Yong Lei — Fachgebiet Angewandte Nanophysik, Institut für Physik & IMN MacroNano, Technische Universität Ilmenau, 98693 Ilmenau, Germany

The development of a new generation of energy storage systems is necessary due to the limited availability of non-renewable energy resources and the substantial environmental impact associated with the utilization of renewable energy. Sodium ion batteries are likely to become the next generation of large-scale commercial energy storage systems because of their low cost and high energy density. Among various materials, Prussian blue analogs (PBAs) have received great attention for their open three-dimensional framework structure and rapid sodium ion insertion/de-insertion capability. And derivatives synthesized using PBAs as templates have been widely studied. Therefore, in this work, PBAs with a well-defined structure were prepared as cost-effective electrode materials by a simple co-precipitation method. The PBAs materials were applied to sodium ion batteries, showing excellent performance. To achieve outstanding performance, a series of adjustments were made to the binder, electrolyte, and voltage range used in the batteries. at a current density of 100 mA g-1 within the voltage range of 2.0-4.2 V, the capacity remains around 120 mAh g-1. Even at ultra-high loadings, the material demonstrates excellent capacity and cycling stability.

Keywords: Na ion battery; Prussian blue analogs