scholarly journals Improved Energy Storage Performance of All-Organic Composite Dielectric via Constructing Sandwich Structure

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1972
Author(s):  
Mengjia Feng ◽  
Tiandong Zhang ◽  
Chunhui Song ◽  
Changhai Zhang ◽  
Yue Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Sandwich Structure ◽  
Volume Ratio ◽  
High Energy ◽  
Energy Storage Density ◽  
Storage Efficiency ◽  
Storage Density ◽  
Energy Storage Efficiency ◽  
High Dielectric ◽  
High Energy Storage

Improving the energy storage density of dielectrics without sacrificing charge-discharge energy storage efficiency and reliability is crucial to the performance improvement of modern electrical and electronic systems, but traditional methods of doping high-dielectric ceramics cannot achieve high energy storage densities without sacrificing reliability and storage efficiency. Here, an all-organic energy storage dielectric composed of ferroelectric and linear polymer with a sandwich structure is proposed and successfully prepared by the electrostatic spinning method. Additionally, the effect of the ferroelectric/linear volume ratio on the dielectric properties, breakdown, and energy storage is systematically studied. The results show that the structure has good energy storage characteristics with a high energy storage density (9.7 J/cm3) and a high energy storage efficiency (78%). In addition, the energy storage density of the composite dielectric under high energy storage efficiency (90%) is effectively improved (25%). This result provides theoretical analysis and experience for the preparation of multilayer energy storage dielectrics which will promote the development and application of energy storage dielectrics.

An effective approach to achieve high energy storage density and efficiency in BNT-based ceramics by doping AgNbO3

2019 ◽  
Vol 48 (48) ◽  
pp. 17864-17873 ◽  
Author(s):  
Hua Wang ◽  
Xiaoli Jiang ◽  
Xiaoqin Liu ◽  
Ruonan Yang ◽  
Yang Yang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Energy Storage ◽  
High Energy ◽  
Frequency Stability ◽  
Energy Storage Density ◽  
Storage Efficiency ◽  
Storage Density ◽  
Energy Storage Efficiency ◽  
High Energy Storage Density ◽  
High Energy Storage

The BNBLT–0.01AN ceramic with the highest energy storage density (Ws) value of ∼1.697 J cm−3 and energy storage efficiency (η) of ∼82.3% exhibits optimal thermal stability and frequency stability.

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.

Lead‐free Ag 1−3 x La x NbO 3 antiferroelectric ceramics with high‐energy storage density and efficiency

2019 ◽  
Vol 102 (8) ◽  
pp. 4640-4647 ◽  
Author(s):  
Nengneng Luo ◽  
Kai Han ◽  
Laijun Liu ◽  
Biaolin Peng ◽  
Xinpeng Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Energy ◽  
Lead Free ◽  
Energy Storage Density ◽  
Storage Density ◽  
High Energy Storage Density ◽  
High Energy Storage
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