The solid solutions of the (1-x)Na0.5Bi0.5TiO₃-xNa0.5K0.5NbO₃ system were produced by the conventional ceramic technology using mechanical activation of the synthesized product. It was found that in the (1-x)Na0.5Bi0.5TiO₃-xNa0.5K0.5NbO₃ system at room temperature, a number of morphotropic phase transitions occur: rhombohedral → cubic → tetragonal → monoclinic phases. The introduction of a small amount of Na0.5K0.5NbO₃ leads to an increase in the temperature stability of the dielectric properties of ceramics. A change in the relaxor properties of the solid solutions of the (1-x)Na0.5Bi0.5TiO₃-xNa0.5K0.5NbO₃ system was shown. The increase in energy density and energy efficiency was found at additive 10mol.% of Na0.5K0.5NbO₃.

PbZrO₃-based antiferroelectric (AFE) ceramics are promising dielectrics for high-energy-density capacitors due to their reversible phase transitions during charge–discharge cycles. In this work, a new composition series, [Pb0.93−xLa0.02(Li1∕2Bi1∕2)xSr0.04][Zr0.57Sn0.34Ti0.09]O₃, with Li+ and Bi3+ substitution of Pb2+ at x=0, 0.04, 0.08, 0.12, 0.16 is investigated for the microstructure evolution, ferroelectric (FE) and dielectric properties. It is found that Li+ and Bi3+ substitution can significantly reduce the sintering temperature and simultaneously enhance the dielectric breakdown strength. An ultrahigh energy efficiency (94.0%) and a large energy density (3.22J/cm3) are achieved in the composition of x=0.12 with a low sintering temperature (1075^∘C).

Ferroelectric ceramics have the potential to be widely applied in the modern industry and military power systems due to their ultrafast charging/discharging speed and high energy density. Considering the structural design and electrical properties of ferroelectric capacitor, it is still a challenge to find out the optimal energy storage of ferroelectric ceramics during the phase-transition process of amorphous/nanocrystalline and polycrystalline. In this work, a finite element model suitable for the multiphase ceramic system is constructed based on the phase field breakdown theory. The nonlinear coupling relationship of multiple physical fields between multiphase ceramics was taken into account in this model. The basic structures of multiphase ceramics are generated by using the Voronoi diagram construction method. The specified structure of multiphase ceramics in the phase-transition process of amorphous/nanocrystalline and polycrystalline was further obtained through the grain boundary diffusion equation. The simulation results show that the multiphase ceramics have an optimal energy storage in the process of amorphous polycrystalline transformation, and the energy storage density reaches the maximum when the crystallinity is 13.96% and the volume fraction of grain is 2.08%. It provides a research plan and idea for revealing the correlation between microstructure and breakdown characteristics of multiphase ceramics. This simulation model realizes the nonlinear coupling of the multiphase ceramic mesoscopic structure and the phase field breakdown. It provides a reference scheme for the structural design and performance optimization of ferroelectric ceramics.

超级电容器是良好的储能器件，具有功率密度高、使用寿命长、充电速度快等优点。激光诱导石墨烯（LIG）是一种常见的双电层电容器电极材料，但LIG双电层电容器通常表现出较低的电化学性能，而活性物质的掺入会提高超级电容器性能。针对如何控制活性物质的掺入问题，提出一种基于激光直写表面滴涂硝酸铁［Fe（NO₃）₃］的聚酰亚胺（PI）薄膜以制备LIG-Fe₃O₄复合物电极的微型超级电容器的方法。激光处理过的区域会同时发生PI薄膜烧蚀与Fe（NO₃）₃分解，产生Fe₃O₄与LIG复合的LIG-Fe₃O₄复合物电极。所制备的LIG-Fe₃O₄复合物微型超级电容器性能与LIG微型超级电容器相比提高了7.58倍。所提方法为制备高性能LIG微型超级电容器提供了一条新途径。

(Pb0.8Ba0.2)[(Zn1/3Nb2/3)0.7Ti0.3]O₃ relaxor-type ferroelectric ceramics was obtained via classical solid-state reaction. The hysteresis loop results were discussed in the frame of ergodicity criterium around the characteristic ferroelectric relaxor freezing temperature. Slimer hysteresis loops were observed below the freezing temperature reflecting an ergodic relaxor behavior. Above this temperature, estimated around 223K for the studied system, larger and unsaturated like ferroelectric hysteresis loops were observed. This temperature also coincides with the slope change on maximum polarization and inflection point of remnant polarization curves. Energy storage, energy loss and efficiency values were determined in a wide temperature range. While the recoverable energy density shows relatively low values (0.23J/cm³), there are interesting behaviors for this parameter and for the efficiency, since the two physical quantities increase versus temperature and the efficiency even reaches the value of 97%.

可逆质子导体陶瓷电化学电池(R-PCEC)是一种既能够将化学能转化为电能，又能将电能转化为化学能的新兴高效能源转换装置。R-PCEC在燃料电池和电解电池双重模式下的可逆操作具有高度灵活性，是能量高效转换和存储最有发展前途的方式之一。然而，对于R-PCEC而言，其在实际操作条件下，电解质电导率，阴阳极的催化活性、耐久性是制约其性能的主要因素。为了对目前国内外R-PCEC技术发展现状形成全面的认识，本文详细介绍了R-PCEC各组成部分的研发现状，包括电解质材料、氢电极和空气电极的研究进展，重点阐述了可逆电池空气电极的材料要求、电极性能和反应机理等最新进展，最后对R-PCEC的发展前景进行了分析和展望。

Dielectric materials with high energy storage density (Wrec) and efficiency (η) are expected for energy storage capacitors. In this work, 〈001〉-textured Na0.7Bi0.1NbO₃ (NBN) ceramics were prepared by a templated grain growth technique. The effects of microstructure and orientation degree on dielectric properties, polarization and energy storage performance were investigated. The textured ceramic with an optimized orientation degree (70%) showed a high Wrec of 2.4 J/cm³ and η of 85.6%. The excellent energy storage properties of textured ceramic originate from the co-effect of interfacial polarization and clamping effect. The results indicate that texture development is a potential candidate to optimize the energy storage properties of functional ceramics.

二维材料粉体具有比表面积大、催化活性位点丰富、易于溶液加工、微结构可调等特性，在能源、电子器件、催化和环境等领域展现出巨大的应用前景。高品质二维材料粉体的低成本、批量化、微结构调控制备是发展其大规模应用的重要前提。本文总结了基于硅藻土模板法制备二维材料粉体(如石墨烯、石墨双炔、过渡金属氮化物、过渡金属硫属化合物粉体)的研究进展；介绍了所获得的二维材料粉体在能量存储器件、印刷电子学、电催化析氢、废水处理等领域的应用研究；最后讨论了基于硅藻土模板法的二维材料粉体制备研究中尚存的问题与挑战，以及二维材料粉体可能的应用方向。