Ben Breitung1,Simon Schweidler1,Anurag Khandelwal1,Yanjiao Ma1,Qingsong Wang2,Abhishek Sarkar1,Jasmin Aghassi-Hagmann1
Karlsruhe Institute of Technology1,Universität Bayreuth2
Ben Breitung1,Simon Schweidler1,Anurag Khandelwal1,Yanjiao Ma1,Qingsong Wang2,Abhishek Sarkar1,Jasmin Aghassi-Hagmann1
Karlsruhe Institute of Technology1,Universität Bayreuth2
Recently, the concept of high entropy has found its way into many different application areas. One example is applications whose operation is based on the properties of crystalline materials, which is a promising field for this type of materials.<br/>High-entropy materials are materials that contain many different elements in a single-phase crystal structure and therefore exhibit high configurational entropy. Due to the complex interactions between the contained elements and other structural features such as lattice distortion by ions of different sizes, high-entropy materials can exhibit diverse and unexpected properties compared to binary materials. High entropy ceramics have only been known since 2015<sup>1</sup>, so this field of research is still relatively unexplored, leaving room for further work.<br/>In this talk, the advantages of different high entropy ceramics in the field of energy and electrical applications will be highlighted.<sup>2</sup> In particular, various high entropy ceramics for energy storage and materials for electronic applications will be discussed. It has been shown that certain high entropy ceramics can stabilize Li- and Na-battery cycling, increase capacity, or suppress structural changes that might otherwise lead to structural degradation of the active material.<sup>3–5</sup> In addition, their implications for some electronic applications are discussed, e.g., for catalytic applications or as functional materials for printed electronics.<br/><br/>1. Rost, C. M. <i>et al.</i> Entropy-stabilized oxides. <i>Nat. Commun.</i> <b>6</b>, 8485 (2015).<br/>2. Ma, Y. <i>et al.</i> High entropy energy materials: challenges and new opportunities. <i>Energy Environ. Sci.</i> <b>14</b>, 2883–2905 (2021).<br/>3. Ma, Y. <i>et al.</i> High Entropy Metal-Organic Frameworks for Highly Reversible Sodium Storage. <i>Adv. Mater.</i> <b>33</b>, 2101342 (2021).<br/>4. Sarkar, A. <i>et al.</i> High entropy oxides for reversible energy storage. <i>Nat. Commun.</i> <b>9</b>, 3400 (2018).<br/>5. Wang, Q. <i>et al.</i> Multi-anionic and -cationic compounds: New high entropy materials for advanced Li-ion batteries. <i>Energy Environ. Sci.</i> <b>12</b>, 2433–2442 (2019).