Review of high entropy ceramics: design, synthesis, structure and properties
TL;DR: High entropy ceramics are novel materials with no less than four different cations or anions as mentioned in this paper, and they have recently generated significant interest with the publication of 70+ related papers since 2015.
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Abstract: High entropy ceramics are novel materials with no less than four different cations or anions. The development of high entropy ceramics follows the ‘configurational entropy stabilized single phase’ concept, which was first demonstrated for high entropy metal alloys in 2004. The advantages of high entropy ceramics are their compositional and structural diversity, and many of them have a band gap, which makes them potential functional materials for a wide range of applications. They have recently generated significant interest with the publication of 70+ related papers since 2015. In this review we have summarized the recent progress in this rapidly growing field. We emphasize the progress by researchers to answer the following three fundamental questions for high entropy ceramics: (1) which combinations of cations or anions can be synthesized as single-phase materials; (2) are the component elements truly random down to the atomic scale; and (3) what new physics, properties and applications will the incorporation of multi-elements elements bring. These fundamental questions are still open at this stage and warrant further studies. The objective of this review is to give a comprehensive overview of the literature to date on high entropy ceramics and to guide further investigation in this emerging field.
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Citations
High-entropy ceramics: Present status, challenges, and a look forward
Huimin Xiang,Yan Xing,Fu zhi Dai,Hongjie Wang,Lei Su,Lei Miao,Guo-Jun Zhang,Yiguang Wang,Xiwei Qi,Lei Yao,Hailong Wang,Biao Zhao,Jianqiang Li,Yanchun Zhou +13 more
TL;DR: High-entropy ceramics (HECs) as mentioned in this paper are solid solutions of inorganic compounds with one or more Wyckoff sites shared by equal or near-equal atomic ratios of multi-principal elements.
High-entropy energy materials: challenges and new opportunities
Yanjiao Ma,Yuan Ma,Qingsong Wang,Simon Schweidler,Miriam Botros,Tongtong Fu,Horst Hahn,Torsten Brezesinski,Ben Breitung +8 more
TL;DR: A comprehensive review of high-entropy materials in the energy field, including alloys, oxides and other entropy-stabilized compounds and composites, in various energy storage and conversion systems.
High-entropy ceramics: Review of principles, production and applications
TL;DR: High-entropy ceramics with five or more cations have recently attracted significant attention due to their superior properties for various structural and functional applications as mentioned in this paper, and significant efforts were started to increase the entropy, minimize the Gibbs free energy, and achieve stable single-phase high-entropically stable ceramic films.
511
Cation-disordered rocksalt-type high-entropy cathodes for Li-ion batteries
Zhengyan Lun,Zhengyan Lun,Bin Ouyang,Bin Ouyang,Deok-Hwang Kwon,Deok-Hwang Kwon,Yang Ha,Emily E. Foley,Tzu-Yang Huang,Tzu-Yang Huang,Zijian Cai,Zijian Cai,Hyun-Chul Kim,Mahalingam Balasubramanian,Yingzhi Sun,Yingzhi Sun,Jianping Huang,Yaosen Tian,Yaosen Tian,Haegyeom Kim,Bryan D. McCloskey,Bryan D. McCloskey,Wanli Yang,Raphaële J. Clément,Huiwen Ji,Gerbrand Ceder,Gerbrand Ceder +26 more
TL;DR: It is shown here that the HE concept can lead to very substantial improvements in performance in battery cathodes, particularly in cation-disordered rocksalt-type cathodes for Li-ion batteries.
High entropy oxides-exploring a paradigm of promising catalysts: A review
Shaima H. Albedwawi,Asala AlJaberi,Gregory N. Haidemenopoulos,Gregory N. Haidemenopoulos,Kyriaki Polychronopoulou +4 more
TL;DR: In this article, a review of the structural elements of high entropy oxides (HEO) is presented and a critical comparison with medium and low entropy metal oxides in terms of the important functionality of HEO to exhibit higher oxygen mobility and withhold high population of oxygen vacancies as well as leading to high metal dispersion.
224
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