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1. High-Entropy Materials for Lithium Batteries

   https://doi.org/10.3390/batteries10030096  

   Ritter, Timothy G; Pappu, Samhita; Shahbazian-Yassar, Reza (March 2024, Batteries)

   High-entropy materials (HEMs) constitute a revolutionary class of materials that have garnered significant attention in the field of materials science, exhibiting extraordinary properties in the realm of energy storage. These equimolar multielemental compounds have demonstrated increased charge capacities, enhanced ionic conductivities, and a prolonged cycle life, attributed to their structural stability. In the anode, transitioning from the traditional graphite (372 mAh g−1) to an HEM anode can increase capacity and enhance cycling stability. For cathodes, lithium iron phosphate (LFP) and nickel manganese cobalt (NMC) can be replaced with new cathodes made from HEMs, leading to greater energy storage. HEMs play a significant role in electrolytes, where they can be utilized as solid electrolytes, such as in ceramics and polymers, or as new high-entropy liquid electrolytes, resulting in longer cycling life, higher ionic conductivities, and stability over wide temperature ranges. The incorporation of HEMs in metal–air batteries offers methods to mitigate the formation of unwanted byproducts, such as Zn(OH)4 and Li2CO3, when used with atmospheric air, resulting in improved cycling life and electrochemical stability. This review examines the basic characteristics of HEMs, with a focus on the various applications of HEMs for use as different components in lithium-ion batteries. The electrochemical performance of these materials is examined, highlighting improvements such as specific capacity, stability, and a longer cycle life. The utilization of HEMs in new anodes, cathodes, separators, and electrolytes offers a promising path towards future energy storage solutions with higher energy densities, improved safety, and a longer cycling life. 

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2. High-entropy materials: fundamentals and applications

   https://doi.org/10.1016/j.jmrt.2023.02.189  

   Brechtl, Jamieson; Lee, Chanho; Liaw, Peter K. (March 2023, Journal of Materials Research and Technology)
3. Functional two-dimensional high-entropy materials

   https://doi.org/10.1038/s43246-023-00341-y  

   Nemani, Srinivasa Kartik; Torkamanzadeh, Mohammad; Wyatt, Brian C.; Presser, Volker; Anasori, Babak (February 2023, Communications Materials)

   Abstract Multiple principal element or high-entropy materials have recently been studied in the two-dimensional (2D) materials phase space. These promising classes of materials combine the unique behavior of solid-solution and entropy-stabilized systems with high aspect ratios and atomically thin characteristics of 2D materials. The current experimental space of these materials includes 2D transition metal oxides, carbides/carbonitrides/nitrides (MXenes), dichalcogenides, and hydrotalcites. However, high-entropy 2D materials have the potential to expand into other types, such as 2D metal-organic frameworks, 2D transition metal carbo-chalcogenides, and 2D transition metal borides (MBenes). Here, we discuss the entropy stabilization from bulk to 2D systems, the effects of disordered multi-valent elements on lattice distortion and local electronic structures and elucidate how these local changes influence the catalytic and electrochemical behavior of these 2D high-entropy materials. We also provide a perspective on 2D high-entropy materials research and its challenges and discuss the importance of this emerging field of nanomaterials in designing tunable compositions with unique electronic structures for energy, catalytic, electronic, and structural applications. 

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4. Era of entropy: Synthesis, structure, properties, and applications of high-entropy materials

   https://doi.org/10.1063/5.0245693  

   Rost, Christina M; Mazza, Alessandro R; McCormack, Scott J; Page, Katharine; Sarkar, Abhishek; Ward, T Zac (November 2024, Applied Physics Letters)
5. Machine-learning and high-throughput studies for high-entropy materials

   https://doi.org/10.1016/j.mser.2021.100645  

   Huang, E-Wen; Lee, Wen-Jay; Singh, Sudhanshu Shekhar; Kumar, Poresh; Lee, Chih-Yu; Lam, Tu-Ngoc; Chin, Hsu-Hsuan; Lin, Bi-Hsuan; Liaw, Peter K. (January 2022, Materials Science and Engineering: R: Reports)