High-Entropy Materials (HEM)

The High Entropy Materials Group focuses on the fundamental understanding of the high entropy concept as well as on correlating material structure and composition to its properties for a wide range of applications.

Group Photo HEM — High-Entropy Materials Group

The High-Entropy Materials group works on the comprehensive understanding of the high-entropy concept and on the utilization of high entropy materials (HEM) for different applications. Due to the versatility of HEM regarding composition and the connected structure/property relationships, a multitude of different areas of applications is conceivable.

Besides general investigations about the high-entropy concept itself and how to predict propterties in HEM, more application oriented topics are in our focus of interest and presented more in detail on the respective topic pages below. They include applications in electronic devices and energy storage, catalysis, band structure tailoring, and mangetism, as well as method development of high-throughput synthesis and analysis.

Our Research on High Entropy Materials

HEM promise manifold interesting properties and a huge variety of possible applications. We research HEM with respect to many different aspects.

Structure, Theory, and Synthesis

Investigating HEM structures, understanding the theoretical background, and developing new synthesis routes.

General Features

Electrochemical Properties

Application of HEMs for energy storage materials, electrolytes and utilization as catalysts.

Electrochemistry of HEM

High-Throughput Methods

High-throuput methods for HEM using automated synthesis and analysis in combination with machine learning.

HTSA

Magneto-Electronic Properties

Exploring the magento-electronic phase space of HEMs utilizing chemical disorder and strain engineering

Mangeto-Electronics

Recent Publications

Researchers Working on High-Entropy Materials
Name	E-Mail	Phone
Sarkar, Abhishek	abhishek sarkarJcf6∂kit edu	+49 721 608-28830
Breitung, Ben	ben breitungWig4∂kit edu	+49 721 608-23109
Stenzel, David	david stenzelAet5∂kit edu	+49 721 608-28906
Neuper, Felix	felix neuperJjg6∂kit edu	+49 721 608-28687
Hahn, Horst	horst hahnNfq6∂kit edu	+49 721 608-26351
Issac, Ibrahim	ibrahim issacHbo9∂kit edu	+49 721 608-28919
Wang, Junbo	junbo wangQmd7∂kit edu	+49 721 608-28923
Velasco Estrada, Leonardo	leonardo estradaCog5∂kit edu	+49 721 608-28830
Lin, Ling	ling linSlm4∂partner kit edu	+49 721 608-26364
Botros, Miriam	miriam botrosZzt6∂kit edu	+49 721 608-28973
Anitha Sukkurji, Parvathy	parvathy anithaNrd8∂partner kit edu	+49 721 608-26963
Wang, Qingsong	qingsong wangIkn4∂kit edu	+49 721 608-28102
Kruk, Robert	robert krukJmg5∂kit edu	+49 721 608-25916
Schweidler, Simon	simon schweidlerPdx0∂kit edu	+49 (0) 721 608-28906
Singaraju, Surya Abhishek	surya singarajuRkx5∂kit edu	+49 721 608-26978
Baby, Tessy Theres	tessy babyXfd0∂kit edu	+49 721 608-28973
Ma, Yanjiao	yanjiao maAol0∂kit edu	+49 721 608-26444
Cui, Yanyan	yanyan cuiPil6∂partner kit edu	+49 721 608-28115

Selected Publications

High Entropy and Low Symmetry: Triclinic High-Entropy Molybdates.
Stenzel, D.; Issac, I.; Wang, K.; Azmi, R.; Singh, R.; Jeong, J.; Najib, S.; Bhattacharya, S. S.; Hahn, H.; Brezesinski, T.; Schweidler, S.; Breitung, B.
2020. Inorganic chemistry, 60 (1), 115–123. doi:10.1021/acs.inorgchem.0c02501

Adhesive Ion‐Gel as Gate Insulator of Electrolyte‐Gated Transistors.
Jeong, J.; Singaraju, S. A.; Aghassi‐Hagmann, J.; Hahn, H.; Breitung, B.
2020. ChemElectroChem, 7 (13), 2735–2739. doi:10.1002/celc.202000305

Spinel to Rock-Salt Transformation in High Entropy Oxides with Li Incorporation.
Wang, J.; Stenzel, D.; Azmi, R.; Najib, S.; Wang, K.; Jeong, J.; Sarkar, A.; Wang, Q.; Sukkurji, P. A.; Bergfeldt, T.; Botros, M.; Maibach, J.; Hahn, H.; Brezesinski, T.; Breitung, B.
2020. Electrochem, 1 (1), 60–74. doi:10.3390/electrochem1010007

Lithium containing layered high entropy oxide structures.
Wang, J.; Cui, Y.; Wang, Q.; Wang, K.; Huang, X.; Stenzel, D.; Sarkar, A.; Azmi, R.; Bergfeldt, T.; Bhattacharya, S. S.; Kruk, R.; Hahn, H.; Schweidler, S.; Brezesinski, T.; Breitung, B.
2020. Scientific reports, 10, Art.-Nr.: 18430. doi:10.1038/s41598-020-75134-1

Mechanochemical synthesis: route to novel rock-salt-structured high-entropy oxides and oxyfluorides.
Lin, L.; Wang, K.; Azmi, R.; Wang, J.; Sarkar, A.; Botros, M.; Najib, S.; Cui, Y.; Stenzel, D.; Anitha Sukkurji, P.; Wang, Q.; Hahn, H.; Schweidler, S.; Breitung, B.
2020. Journal of materials science, 55, 16879–16889. doi:10.1007/s10853-020-05183-4

High entropy oxides: The role of entropy, enthalpy and synergy.
Sarkar, A.; Breitung, B.; Hahn, H.
2020. Scripta materialia, 187, 43–48. doi:10.1016/j.scriptamat.2020.05.019

Gassing Behavior of High‐Entropy Oxide Anode and Oxyfluoride Cathode Probed Using Differential Electrochemical Mass Spectrometry.
Breitung, B.; Wang, Q.; Schiele, A.; Tripković, Đ.; Sarkar, A.; Velasco, L.; Wang, D.; Bhattacharya, S. S.; Hahn, H.; Brezesinski, T.
2020. Batteries & supercaps, 3 (4), 361–369. doi:10.1002/batt.202000010

On the homogeneity of high entropy oxides: An investigation at the atomic scale.
Chellali, M. R.; Sarkar, A.; Nandam, S. H.; Bhattacharya, S. S.; Breitung, B.; Hahn, H.; Velasco, L.
2019. Scripta materialia, 166, 58–63. doi:10.1016/j.scriptamat.2019.02.039

High-Entropy Oxides: Fundamental Aspects and Electrochemical Properties.
Sarkar, A.; Wang, Q.; Schiele, A.; Chellali, M. R.; Bhattacharya, S. S.; Wang, D.; Brezesinski, T.; Hahn, H.; Velasco, L.; Breitung, B.
2019. Advanced materials, 1806236. doi:10.1002/adma.201806236

High entropy oxides as anode material for Li-ion battery applications: A practical approach.
Wang, Q.; Sarkar, A.; Li, Z.; Lu, Y.; Velasco, L.; Bhattacharya, S. S.; Brezesinski, T.; Hahn, H.; Breitung, B.
2019. Electrochemistry communications, 100, 121–125. doi:10.1016/j.elecom.2019.02.001

High entropy oxides for reversible energy storage.
Sarkar, A.; Velasco, L.; Wang, D.; Wang, Q.; Talasila, G.; de Biasi, L.; Kübel, C.; Brezesinski, T.; Bhattacharya, S. S.; Hahn, H.; Breitung, B.
2018. Nature Communications, 9 (1), Article number: 3400. doi:10.1038/s41467-018-05774-5