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Rapid Communication | Open Access

Pyrochlore-based high-entropy ceramics for capacitive energy storage

Yiying CHENJunlei QIMinhao ZHANGZixi LUOYuan-Hua LIN( )
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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Graphical Abstract


High-performance dielectrics are widely used in high-power systems, electric vehicles, and aerospace, as key materials for capacitor devices. Such application scenarios under these extreme conditions require ultra-high stability and reliability of the dielectrics. Herein, a novel pyrochlore component with high-entropy design of Bi1.5Zn0.75Mg0.25Nb0.75Ta0.75O7 (BZMNT) bulk endows an excellent energy storage performance of Wrec 2.72 J/cm3 together with an ultra-high energy efficiency of 91% at a significant enhanced electric field Eb of 650 kV/cm. Meanwhile, the temperature coefficient (TCC) of BZMNT (~ -220 ppm/℃) is also found to be greatly improved compared with that of the pure Bi1.5ZnNb1.5O7 (BZN) (~ -300 ppm/℃), demonstrating its potential application in temperature-reliable conditions. The high-entropy design results in lattice distortion that contributes to the polarization, while the retardation effect results in a reduction of grain size to submicron scale which enhances the Eb. The high-entropy design provides a new strategy for improving the high energy storage performance of ceramic materials.


Pan H, Li F, Liu Y, et al. Ultrahigh-energy density lead-free dielectric films via polymorphic nanodomain design. Science 2019, 365: 578-582.
Wang G, Lu ZL, Li Y, et al. Electroceramics for high-energy density capacitors: Current status and future perspectives. Chem Rev 2021, 121: 6124-6172.
Yang LT, Kong X, Li F, et al. Perovskite lead-free dielectrics for energy storage applications. Prog Mater Sci 2019, 102: 72-108.
Zhang MH, Qi JL, Liu YQ, et al. High energy storage capability of perovskite relaxor ferroelectrics via hierarchical optimization. Rare Met 2022, 41: 730-744.
Lin XR, Salari M, Arava LMR, et al. High temperature electrical energy storage: Advances, challenges, and frontiers. Chem Soc Rev 2016, 45: 5848-5887.
Zhao PY, Cai ZM, Wu LW, et al. Perspectives and challenges for lead-free energy-storage multilayer ceramic capacitors. J Adv Ceram 2021, 10: 1153-1193.
Li DX, Zeng XJ, Li ZP, et al. Progress and perspectives in dielectric energy storage ceramics. J Adv Ceram 2021, 10: 675-703.
Zhang RZ, Reece MJ. Review of high entropy ceramics: Design, synthesis, structure and properties. J Mater Chem A 2019, 7: 22148-22162.
Amiri A, Shahbazian-Yassar R. Recent progress of high-entropy materials for energy storage and conversion. J Mater Chem A 2021, 9: 782-823.
Li F, Zhou L, Liu JX, et al. High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials. J Adv Ceram 2019, 8: 576-582.
Cantor B, Chang ITH, Knight P, et al. Microstructural development in equiatomic multicomponent alloys. Mater Sci Eng A 2004, 375-377: 213-218.
Yeh JW, Chen SK, Lin SJ, et al. Nanostructured high-entropy alloys with multiple principal elements: Novel alloy design concepts and outcomes. Adv Eng Mater 2004, 6: 299-303.
Oses C, Toher C, Curtarolo S. High-entropy ceramics. Nat Rev Mater 2020, 5: 295-309.
Rost CM, Sachet E, Borman T, et al. Entropy-stabilized oxides. Nat Commun 2015, 6: 8485.
Rost CM, Rak Z, Brenner DW, et al. Local structure of the MgxNixCoxCuxZnxO (x = 0.2) entropy-stabilized oxide: An EXAFS study. J Am Ceram Soc 2017, 100: 2732-2738.
Chen KP, Pei XT, Tang L, et al. A five-component entropy-stabilized fluorite oxide. J Eur Ceram Soc 2018, 38: 4161-4164.
Vayer F, Decorse C, Bérardan D, et al. New entropy-stabilized oxide with pyrochlore structure: Dy2(Ti0.2Zr0.2Hf0.2Ge0.2Sn0.2)2O7. J Alloys Compd 2021, 883: 160773.
Sarkar A, Djenadic R, Wang D, et al. Rare earth and transition metal based entropy stabilised perovskite type oxides. J Eur Ceram Soc 2018, 38: 2318-2327.
Dąbrowa J, Stygar M, Mikuła A, et al. Synthesis and microstructure of the (Co,Cr,Fe,Mn,Ni)3O4 high entropy oxide characterized by spinel structure. Mater Lett 2018, 216: 32-36.
Yang WT, Zheng GP. High energy storage density and efficiency in nanostructured (Bi0.2Na0.2K0.2La0.2Sr0.2)TiO3 high-entropy ceramics. J Am Ceram Soc 2022, 105: 1083-1094.
Xiang HM, Xing Y, Dai FZ, et al. High-entropy ceramics: Present status, challenges, and a look forward. J Adv Ceram 2021, 10: 385-441.
Subramanian MA, Aravamudan G, Subba Rao GV. Oxide pyrochlores—A review. Prog Solid State Chem 1983, 15: 55-143.
Wang XL, Wang H, Yao X. Structures, phase transformations, and dielectric properties of pyrochlores containing bismuth. J Am Ceram Soc 2005, 80: 2745-2748.
Nino JC, Lanagan MT, Randall CA. Phase formation and reactions in the Bi2O3-ZnO-Nb2O5-Ag pyrochlore system. J Mater Res 2001, 16: 1460-1464.
Da Silva SA, Zanetti SM. Processing of Bi1.5ZnNb1.5O7 ceramics for LTCC applications: Comparison of synthesis and sintering methods. Ceram Int 2009, 35: 2755-2759.
Levin I, Amos TG, Nino JC, et al. Structural study of an unusual cubic pyrochlore Bi1.5Zn0.92Nb1.5O6.92. J Solid State Chem 2002, 168: 69-75.
Valant M, Davies PK. Crystal chemistry and dielectric properties of chemically substituted (Bi1.5Zn1.0Nb1.5)o7 and Bi2(Zn2/3Nb4/3)O7 pyrochlores. J Am Ceram Soc 2000, 83: 147-153.
Tian HY, Wang Y, Wang DY, et al. Dielectric properties and abnormal C-V characteristics of Ba0.5Sr0.5TiO3-Bi1.5ZnNb1.5O7 composite thin films grown on MgO (001) substrates by pulsed laser deposition. Appl Phys Lett 2006, 89: 142905.
Sarkar A, Wang QS, Schiele A, et al. High-entropy oxides: Fundamental aspects and electrochemical properties. Adv Mater 2019, 31: 1806236.
Ye YF, Wang Q, Lu J, et al. High-entropy alloy: Challenges and prospects. Mater Today 2016, 19: 349-362.
Zhao Z, Buscaglia V, Viviani M, et al. Grain-size effects on the ferroelectric behavior of dense nanocrystalline BaTiO3 ceramics. Phys Rev B 2004, 70: 024107.
Qi JL, Cao MH, Chen YY, et al. Effects of sintering temperature on microstructure and dielectric properties of Sr0.985Ce0.01TiO3 ceramics. J Alloys Compd 2018, 762: 950-956.
Qi JL, Cao MH, Chen YY, et al. Cerium doped strontium titanate with stable high permittivity and low dielectric loss. J Alloys Compd 2019, 772: 1105-1112.
Du HL, Yao X. Structural trends and dielectric properties of Bi-based pyrochlores. J Mater Sci Mater Electron 2004, 15: 613-616.
Thayer RL, Randall CA, Trolier-McKinstry S. Medium permittivity bismuth zinc niobate thin film capacitors. J Appl Phys 2003, 94: 1941-1947.
Liu WH, Wang H, Li KC, et al. Bi1.5ZnNb1.5O7 cubic pyrochlore ceramics prepared by aqueous solution-gel method. J Sol Gel Sci Technol 2009, 52: 153-157.
Journal of Advanced Ceramics
Pages 1179-1185
Cite this article:
CHEN Y, QI J, ZHANG M, et al. Pyrochlore-based high-entropy ceramics for capacitive energy storage. Journal of Advanced Ceramics, 2022, 11(7): 1179-1185.








Web of Science





Received: 01 May 2022
Accepted: 18 May 2022
Published: 25 May 2022
© The Author(s) 2022.

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