在铜基陶中实现特殊的储能性能,通过弱合的放松器和谷物边界增强设计
Wentao Zhong1, Xuyu Liu1, Xiangting Zheng1
1Lab for Nanoelectronics and NanoDevices, Department of Electronics Science and Technology, Hangzhou Dianzi University, Hangzhou 310018, China.
ACS applied materials & interfaces
|February 18, 2025
概括
一种新的无黄铜放松器铁电陶基于Sr$_{0.6}$Ba$_{0.4}$Nb$_{2}$O$_{6}$ (SBN) 实现了高能量储存密度. 这种材料为先进的介电陶电容器提供了有前途的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 陶工程 陶工程 陶工程
背景情况:
- 介电陶电容对于脉冲动力系统至关重要,要求高能量存储密度.
- 现有的材料在实现大可回收能储密度 (Wrec) 方面面临限制.
- 在先进的电容器应用中,人们对无放松铁电有很大的需求.
研究的目的:
- 设计和研究一种新的铜放松器铁电陶,用于增强能量存储.
- 探索Bi$^{3+}$和Fe$^{3+}$兴奋剂对结构和介电性质的影响.
- 为了提高高性能电容器的断裂场强度 (EBDS).
主要方法:
- 合成一种基于Sr$_{0.6}$$Ba$_{0.4}$Nb$_{2}$O$_{6}$ (SBN) 的陶,添加了Bi$^{3+}$和Fe$^{3+}$以及CuO.
- 使用先进技术分析晶体结构和调制的结构特征.
- 电气性能测量以确定可回收能源储存密度 (Wrec) 和效率 (η).
主要成果:
- 设计的陶实现了8.74 J·cm$^{-3}$的可回收能量储存密度 (Wrec) 和740 kV·cm$^{-1}$的高效率 (η) ~90.9%.
- 兴奋剂改进了晶体结构,诱导了不相称的调制,并通过极性纳米区域 (PNR) 增强了放松器行为.
- 在谷物边界的CuO聚合加强了结构,并改善了分解场强度 (EBDS).
结论:
- 成功开发了一种具有竞争力的无黄铜放松器铁电陶.
- 该材料表现出优异的储能能力,使其适用于先进的介电陶电容器.
- 这项研究扩大了高性能,环保的储能解决方案的材料选择.
更多相关视频
14:51An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature
Published on: September 23, 2018
6.9K
08:00Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
Published on: March 27, 2018
11.0K
相关概念视频
01:26Residual Stresses
203
Residual stresses reside in a structure even after removing the original stress inducer. This phenomenon often arises from varied plastic deformations across different parts of a structure. Consider a rod stretched beyond its yield point. It will not regain its original length due to permanent deformation. Even after load removal, the rod does not entirely lose stress because of uneven plastic deformations, resulting in residual stresses. The computation of these stresses in structures is...
203
01:20Strain-Energy Density
353
Understanding the strain energy density in materials under axial load is crucial for evaluating their mechanical behavior and durability. When a rod is subjected to such a load, it elongates and stores energy, known as strain energy, as potential energy within the material. This energy is measured in terms of energy per unit volume.
In the elastic region of a material, the relationship between the stress and the strain is linear and follows Hooke's Law. The strain energy density in this...
In the elastic region of a material, the relationship between the stress and the strain is linear and follows Hooke's Law. The strain energy density in this...
353
02:54Trends in Lattice Energy: Ion Size and Charge
23.6K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.6K
01:20Elastic Strain Energy for Shearing Stresses
154
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
154
01:22Elastic Strain Energy for Normal Stresses
131
Strain energy quantifies the energy stored within a material due to deformation under loading conditions, a fundamental concept in materials science and engineering. The strain energy can be modeled when a material is subjected to axial loading with uniformly distributed stress. In this scenario, the stress experienced by the material is the internal force divided by the cross-sectional area, and the strain induced is directly proportional to this stress through the modulus of elasticity.
If...
If...
131
01:12Bonding and Strength of Aggregate
137
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
137