Effects of BiScO3 Doping on the Phase Structure, Ferroelectric, Energy Storage, Strain, and Dielectric Properties of Bi0.5Na0.5TiO3 Ceramics

2020 ◽  
Vol 15 (3) ◽  
pp. 345-352
Author(s):  
Yabin Sun ◽  
Hua Wang ◽  
Guobao Liu ◽  
Hang Xie ◽  
Ling Yang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Dielectric Properties ◽  
Phase Structure ◽  
Rhombohedral Phase ◽  
Maximum Energy ◽  
Cubic Phase ◽  
Relaxor Behavior ◽  
Storage Efficiency ◽  
Average Grain Size ◽  
Energy Storage Efficiency

In this study, (1–x)Bi0.5Na0.5TiO3– xBiScO3 (BNT–xBS) ceramics were synthesized via conventional solidstate reaction sintering. The effects of the BiScO3 content on the surface microstructure, energy storage, strain, and dielectric properties of BNT–xBS ceramics were systemically investigated. Results indicated that the phase structure of BNT–xBS ceramics transformed from the rhombohedral phase into the pseudo-cubic phase. As the increasing BiScO3 content, the average grain size decreased. BiScO3 destroyed the long-range ordered ferroelectric phase, enhancing relaxor behavior. Energy storage density initially increased and then decreased, reaching a maximum of 0.17 J/cm3 at x = 0.1. In addition, the maximum energy storage efficiency was 59% at x = 0.2. The BiScO3 content significantly affected the electrical properties of BNT– xBS ceramics.

scholarly journals Investigation of the coupling effect of flexoelectricity and ferroelasticity on energy storage efficiency of relaxor ferroelectrics

2021 ◽  
Author(s):  
X. F. Zhao ◽  
A. K. Soh
Keyword(s):  
Energy Storage ◽  
Electric Field ◽  
Domain Switching ◽  
Coupling Effect ◽  
Landau Theory ◽  
Elastic Field ◽  
Relaxor Ferroelectrics ◽  
Relaxor Behavior ◽  
Storage Efficiency ◽  
Energy Storage Efficiency

The Ginzburg–Landau theory and dipole defect model have been employed to investigate the flexoelectric and ferroelastic effects on the ferroelectric and energy storage properties of relaxor ferroelectrics (RFs). The results obtained show that due to the existence of polar nanoregions (PNRs) in RFs, the elastic field of the material, which is induced by both the flexoelectric and ferroelastic effects, leads to the increase of the domain switching energy and coercive field and the decrease of the energy storage efficiency. In contrast, the short-range electric field induced by the dipole defects enhances the energy storage efficiency of the material by enhancing the material’s relaxor behavior. Hence, the energy storage efficiency of RFs can be effectively functionalized by modulating the composition ratio and the electric field of the RF materials.

scholarly journals Mechanical design and energy storage efficiency research of a variable stiffness elastic actuator

2020 ◽  
Vol 17 (5) ◽  
pp. 172988142093095
Author(s):  
Bo Liu ◽  
Wenjie Ge ◽  
Donglai Zhao ◽  
Zhihua Zou ◽  
Bowei Li
Keyword(s):  
Energy Storage ◽  
Mechanical Design ◽  
Variable Stiffness ◽  
Maximum Energy ◽  
Stiffness Ratio ◽  
Storage Efficiency ◽  
Apparent Stiffness ◽  
Simulation And Experiment ◽  
Energy Storage Efficiency ◽  
Machine Interaction

The energy storage efficiency is an important performance of a robot or a man–machine interaction device. This article will introduce the process of design and energy storage research of a variable stiffness elastic actuator with a two-elements and one actuator mod. Firstly, the principle model will be present to analyze the operation theory. Then, the simulation and experiment model will be described to calculate the characteristics of the device. The stiffness ratio of the two springs constituting the elastic element of the device will be studied in detail, and the results can present the rule of the energy storage value. Finally, the performance of the device, the error of the experiment, and a special mechanism which presented at the extreme shape condition of the ratio will be discussed. The conclusion is that the maximum energy that the device can store is 1.415 J at the stiffness ratio equaling 0.46, and the energy storage efficiency is 1.3608 at the ratio equaling 0.45, when the weight of the device is 3.54 kg and the apparent stiffness is about 3450 N/m.

Optical, Dielectric Properties and Energy Storage Efficiency of ZnO/Epoxy Nanocomposites

2018 ◽  
Vol 29 (2) ◽  
pp. 456-464 ◽  
Author(s):  
Wissal Jilani ◽  
Najla Fourati ◽  
Chouki Zerrouki ◽  
Olivier Gallot-Lavallée ◽  
Hajer Guermazi
Keyword(s):  
Energy Storage ◽  
Dielectric Properties ◽  
Storage Efficiency ◽  
Epoxy Nanocomposites ◽  
Optical Dielectric ◽  
Energy Storage Efficiency

scholarly journals The Impact of Active and Passive Thermal Management on the Energy Storage Efficiency of Metal Hydride Pairs Based Heat Storage

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3006
Author(s):  
Serge Nyallang Nyamsi ◽  
Ivan Tolj
Keyword(s):  
Heat Transfer ◽  
Energy Storage ◽  
Thermal Management ◽  
Metal Hydride ◽  
Heat Storage ◽  
Energy Storage Density ◽  
Storage Efficiency ◽  
Transfer Enhancement ◽  
Storage Density ◽  
Energy Storage Efficiency

Two-tank metal hydride pairs have gained tremendous interest in thermal energy storage systems for concentrating solar power plants or industrial waste heat recovery. Generally, the system’s performance depends on selecting and matching the metal hydride pairs and the thermal management adopted. In this study, the 2D mathematical modeling used to investigate the heat storage system’s performance under different thermal management techniques, including active and passive heat transfer techniques, is analyzed and discussed in detail. The change in the energy storage density, the specific power output, and the energy storage efficiency is studied under different heat transfer measures applied to the two tanks. The results showed that there is a trade-off between the energy storage density and the energy storage efficiency. The adoption of active heat transfer enhancement (convective heat transfer enhancement) leads to a high energy storage density of 670 MJ m−3 (close to the maximum theoretical value of 755.3 MJ m−3). In contrast, the energy storage efficiency decreases dramatically due to the increase in the pumping power. On the other hand, passive heat transfer techniques using the bed’s thermal conductivity enhancers provide a balance between the energy storage density (578 MJ m−3) and the energy efficiency (74%). The utilization of phase change material as an internal heat recovery medium leads to a further reduction in the heat storage performance indicators (142 MJ m−3 and 49%). Nevertheless, such a system combining thermochemical and latent heat storage, if properly optimized, can be promising for thermal energy storage applications.

Extraordinary energy storage performance and thermal stability in sodium niobate-based ceramics modified by the ion disorder and stabilized antiferroelectric orthorhombic R phase

2021 ◽  
Author(s):  
Ruirui Kang ◽  
Zepeng Wang ◽  
Weijie Yang ◽  
Xiaopei Zhu ◽  
Peng Shi ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electric Vehicles ◽  
High Performance ◽  
Hybrid Electric Vehicles ◽  
Sodium Niobate ◽  
Storage Efficiency ◽  
Storage Performance ◽  
Energy Storage Properties ◽  
Energy Storage Efficiency ◽  
Storage Properties

Developing high-performance dielectric capacitors is essential to meet the growing demands of hybrid electric vehicles and high-power applications. The energy storage efficiency and the temperature-variant energy storage properties should be...

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