Enhanced energy storage density and efficiency in A/B-site-engineered silver niobate ceramics

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-09-01 DOI:10.1016/j.ceramint.2025.06.190

Renzhong Xue , Xiaosong Liu , Yuping Yang , Xiang Zhu , Haiyan Wang

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引用次数: 0

Abstract

Lead-free silver niobate (AgNbO₃, AN) ceramics have great potential in the pulse power equipment and other application fields due to fast charge and discharge speeds and high power density. However, their inferior energy storage density and efficiency limit their application. To address these issues, the cooperative optimization of A/B-sites in AN ceramics through Sm³⁺, Ca²⁺ and Ta⁵⁺ co-doping was performed in the present work. Such modification strategy inhibited the grain growth, while promoting the formation of a room-temperature M₂-M₃ phase boundary, enhancing the antiferroelectric stability and relaxation feature. The breakdown field strength increased from 210 kV/cm for AN to 394 kV/cm for Ag_0.75Sm_0.05Ca_0.05Nb_0.9Ta_0.1O₃ ceramic. As a result, an ultrahigh energy storage density of 7.16 J/cm³ and a high efficiency of 81.2 % at 385 kV/cm along with excellent frequency, temperature and cycle stabilities were achieved in Ag_0.8Sm_0.04Ca_0.04Nb_0.9Ta_0.1O₃ ceramics. Therefore, this study demonstrates the effectiveness of comprehensive regulation of AN energy storage performance and its applicability for modern electrical and electronic equipment.

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增强了A/ b位点工程铌酸银陶瓷的储能密度和效率

无铅铌酸银（AgNbO3， AN）陶瓷由于充放电速度快、功率密度高，在脉冲功率设备等应用领域具有很大的潜力。但其储能密度和效率较低，限制了其应用。为了解决这些问题，本工作通过Sm3+、Ca2+和Ta5+共掺杂对AN陶瓷的A/ b位点进行了协同优化。这种改性策略抑制了晶粒的生长，同时促进了室温M2-M3相边界的形成，增强了反铁电稳定性和弛豫特性。击穿场强由AN的210 kV/cm提高到ag0.75 sm0.05 ca0.05 nb0.9 ta0.1 . o3陶瓷的394 kV/cm。结果表明，Ag0.8Sm0.04Ca0.04Nb0.9Ta0.1O3陶瓷具有7.16 J/cm3的超高储能密度和81.2%的385 kV/cm效率，并具有良好的频率、温度和循环稳定性。因此，本研究证明了AN储能性能综合调控的有效性及其对现代电气电子设备的适用性。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.