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Multi-scale synergic optimization strategy for dielectric energy storage ceramics

Journal of Advanced Ceramics 2023年第4期12卷 649-680页

作者： Xuhui Fan Jing Wang Hao Yua Zehan Zheng Ji Zhang Kongjun Zhu State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China School of Materials Science and Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China

dielectric capacitors,serving as the indispensable components in advanced high-power energy storage devices,have attracted ever-increasing attention with the rapid development of science and *** various dielectric capacitors,ceramic capacitors with perovskite structures show unique advantages in actual application,e.g.,excellent adaptability in high-temperature *** the optimization of their energy storage performance has become a hot research topic *** review presents the basic principles of energy storage in dielectric ceramics and introduces multi-scale synergic optimization strategies according to the key factors for superior energy storage *** summarizing the common points in numerous works,several universal modification strategies are reviewed,and future research on fatigue fracture of ceramic capacitors under multi-field including but not limited to force,electric,and thermal coupling conditions is also anticipated.

关键词： dielectric capacitors high-power energy storage multi-scale

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Phase engineering in NaNbO_(3) antiferroelectrics for high energystorage density

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Journal of Materiomics 2022年第4期8卷 753-762页

作者： Zhengu Chen Shuaifei Mao Li Ma Gengguang Luo Qin Feng Zhenyong Cen Fujita Toyohisa Xiuning Peng Laijun Liu Huanfu Zhou Changzheng Hu Nengneng Luo School of Chemistry&Chemical Engineering Guangxi UniversityNanning530004China Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning530004China Center on Nanoenergy Research School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning530004China School of Civil Engineering and Architecture Guangxi UniversityNanning530004China College of Materials Science and Engineering Guilin University of TechnologyGuilin541004China

The NaNbO_(3) antiferroelectrics have been considered as a potential candidate for dielectric capacitorsapplications. However, the high-electric-field-unstable antiferroelectric phase resulted in low energystorage density and efficiency. Herein, good energy storage properties were realized in (1-x)NaNbO_(3)- xNaTaO_(3) ceramics, by building a new phase boundary. As a result, a high recoverable energy density(Wrec) of 2.2 J/cm3 and efficiency (h) of 80.1% were achieved in 0.50NaNbO_(3)-0.50NaTaO_(3) ceramic at300 kV/cm. The excellent energy storage performance originates from an antiferroelectric-paraelectricphase boundary with simultaneously high polarization and low hysteresis, by tailoring the ratio ofantiferroelectric and paraelectric phases. Moreover, the 0.50NaNbO_(3)-0.50NaTaO_(3) ceramic also exhibitedgood temperature and frequency stability, together with excellent charge-discharge performance. Theresults pave a good way of designing new NaNbO_(3)-based antiferroelectrics with good energy storageperformance.

关键词： NaNbO_(3)ceramics Antiferroelectrics Paraelectrics Energy storage density dielectric capacitors

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Review of recent advances of polymer based dielectrics for high-energy storage in electronic power devices from the perspective of target applications

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Frontiers of Chemical Science and Engineering 2021年第1期15卷 18-34页

作者： Wenjie Sun Jiale Mao Shuang Wang Lei Zhang Yonghong Cheng State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong UniversityXi’an 710049China School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China

Polymer-based dielectric capacitors are widely-used energy storage ***,although the functions of dielectrics in applications like high-voltage direct current transmission projects,distributed energy systems,high-power pulse systems and new energy electric vehicles are similar,their requirements can be quite *** electric loss is a critical prerequisite for capacitors for electric grids,while high-temperature stability is an essential pre-requirement for those in electric *** paper reviews recent advances in this area,and categorizes dielectrics in terms of their foremost properties related to their target *** for polymer-based dielectrics in various power electronic equipment are emphasized,including high energy storage density,low dissipation,high working temperature and fast-response *** paper considers innovations including chemical structure modification,composite fabrication and structure re-design,and the enhancements to material performances *** advantages and limitations of these methods are also discussed.

关键词： dielectric capacitors polymer-based dielectrics energy density dielectric loss working temperature frequency response

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Preparation and energy storage properties of <001>-textured NaNbO_(3)-based ceramics

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Journal of Advanced dielectrics 2023年第4期13卷 69-75页

作者： Zhengu Chen Fan Chang Gengguang Luo Li Ma Ju Chen Jinge Pei Zhenyong Cen Qin Feng Fujita Toyohisa Nengneng Luo School of Chemistry&Chemical Engineering Guangxi University Nanning 530004P.R.China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures School of Resources Environment and MaterialsGuangxi UniversityNanning 530004P.R.China

dielectric materials with high energy storage density(Wrec)and efficiency(η)are expected for energy storage *** this work,-textured Na0.7Bi0.1NbO_(3)(NBN)ceramics were prepared by a templated grain growth *** effects of microstructure and orientation degree on dielectric properties,polarization and energy storage performance were *** textured ceramic with an optimized orientation degree(70%)showed a high Wrec of 2.4 J/cm^(3) andηof 85.6%.The excellent energy storage properties of textured ceramic originate from the co-effect of interfacial polarization and clamping *** results indicate that texture development is a potential candidate to optimize the energy storage properties of functional ceramics.

关键词： NaNbO_(3) ceramics grain orientation energy storage density dielectric capacitors

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