scholarly journals Effect of Composition on Polarization Hysteresis and Energy Storage Ability of P(VDF-TrFE-CFE) Relaxor Terpolymers

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1343
Author(s):  
Yusra Hambal ◽  
Vladimir V. Shvartsman ◽  
Daniil Lewin ◽  
Chieng Huo Huat ◽  
Xin Chen ◽  
...  
Keyword(s):  
Energy Storage ◽  
Hysteresis Loops ◽  
Freezing Temperature ◽  
Relaxor Behavior ◽  
Ferroelectric State ◽  
Storage Performance ◽  
Relaxor State ◽  
A Charge ◽  
First Time ◽  
Discharge Efficiency

The temperature dependence of the dielectric permittivity and polarization hysteresis loops of P(VDF-TrFE-CFE) polymer films with different compositions are studied. Among them, the three compositions, 51.3/48.7/6.2, 59.8/40.2/7.3, and 70/30/8.1, are characterized for the first time. Relaxor behavior is confirmed for all studied samples. Increasing the CFE content results in lowering the freezing temperature and stabilizes the ergodic relaxor state. The observed double hysteresis loops are related to the field-induced transition to a ferroelectric state. The critical field corresponding to this transition varies with the composition and temperature; it becomes larger for temperatures far from the freezing temperature. The energy storage performance is evaluated from the analysis of unipolar polarization hysteresis loops. P(VDF-TrFE-CFE) 59.8/40.2/7.3 shows the largest energy density of about 5 J·cm−3 (at the field of 200 MV·m−1) and a charge–discharge efficiency of 63%, which iscomparable with the best literature data for the neat terpolymers.

Energy-storage performance of NaNbO3 based multilayered capacitors

2021 ◽  
Author(s):  
Li-Feng Zhu ◽  
Yongke Yan ◽  
Haoyang Leng ◽  
Xiaotian Li ◽  
Li-Qian Cheng ◽  
...  
Keyword(s):  
Energy Storage ◽  
Grain Refinement ◽  
Relaxor Behavior ◽  
Storage Performance ◽  
Multilayer Capacitors

Energy-storage performances of NaNbO3 system were effectively enhanced by composition engineering inducing relaxor behavior and grain refinement. Excellent Wrec = 3.7 J cm−3 and η = 82.1% were achieved in the NN-0.04CZ-0.16BNT multilayer capacitors.

scholarly journals Enhanced energy storage performance and fatigue resistance of Mn-doped 0.7Na0.5Bi0.5TiO3–0.3Sr0.7Bi0.2TiO3 lead-free ferroelectric ceramics

2020 ◽  
pp. 1-10
Author(s):  
Jinbo Wang ◽  
Huiqing Fan
Keyword(s):  
Energy Storage ◽  
Fatigue Resistance ◽  
Dielectric Response ◽  
Lead Free ◽  
Ferroelectric Ceramics ◽  
Relaxor Behavior ◽  
Storage Performance ◽  
Energy Storage Properties ◽  
Mn Doped ◽  
Storage Properties

The validity of Mn element on enhanced energy storage performance and fatigue resistance of Mn-doped 0.7Na0.5Bi0.5TiO3–0.3Sr0.7Bi0.2TiO3 lead-free ferroelectric ceramics (BNT–BST–xMn) is certified by doping. The effects of Mn modification on the dielectric behavior, ferroelectric, energy storage properties, and AC impedance are comprehensively investigated. It is found that the average grain size of the ceramics modified by Mn additions is reduced slightly. Moreover, the relaxor properties are evidently enhanced with the increased Mn content. The AC impedance spectra can even better clarify the dielectric response and relaxor behavior. The results suggest that both of the dielectric response and relaxor behavior are determined by defects especially concentration of the oxygen vacancy. The superior energy storage properties are realized at x = 0.05 with an energy storage density (Wrec) of 1.33 J/cm3 as well as energy storage efficiency (η) of 86.2% at 100 kV/cm, accompanied with a superior thermal stability. BNT–BST–5Mn ceramics can maintain a stable energy storage performance within 106 fatigue cycles, indicating an excellent fatigue resistance.

Relaxor behavior and energy storage performance of ferroelectric PLZT thin films with different Zr/Ti ratios

2014 ◽  
Vol 40 (1) ◽  
pp. 557-562 ◽  
Author(s):  
Zhongqiang Hu ◽  
Beihai Ma ◽  
Shanshan Liu ◽  
Manoj Narayanan ◽  
Uthamalingam Balachandran
Keyword(s):  
Thin Films ◽  
Energy Storage ◽  
Relaxor Behavior ◽  
Storage Performance ◽  
Plzt Thin Films

Influence of Bi-site Substitution on the Ferroelectricity of the Aurivillius Compound Bi2SrNb2O9

1998 ◽  
Vol 13 (9) ◽  
pp. 2565-2571 ◽  
Author(s):  
P. Durán-Martín- ◽  
A. Castro ◽  
P. Millán ◽  
B. Jiménez
Keyword(s):  
Dielectric Constant ◽  
Electric Conductivity ◽  
Remanent Polarization ◽  
Hysteresis Loops ◽  
Relaxor Behavior ◽  
Paraelectric Phase Transition ◽  
Thermally Activated ◽  
Coupling Factors ◽  
Higher Temperature ◽  
First Time

Ceramics based on the composition Bi2SrNb2O9 with isomorphic substitutions of cations in the Bi2O22+ and the perovskite layers, Bi2−xTexSr1−xNa(K)xNb2O9, have been prepared by solid state reaction. The ferroelectricity of this Aurivillius type structure has been studied. Dielectric measurements as a function of the temperature show a low temperature maximum in the dielectric constant that would correspond to a ferro-;paraelectric phase transition. The temperature of this maximum increases when the radius of the ion that substitutes Sr for decreases. A second maximum in the dielectric constant is found at higher temperature possibly corresponding to a relaxor ferroelectric. Measurements of remanent polarization as a function of the temperature seem to confirm the relaxor behavior, because the polarization disappears at temperatures between the two maxima of the dielectric constant. Saturated hysteresis loops are obtained for all the substituted samples at temperatures above 300 °C. Ferroelectric parameters such as the polarization, coercive field, and coupling factors of the BSN family compounds were obtained for the first time. The ac electric conductivity shows anomalies at temperatures close to those where the remanent polarization disappears. Activation energies calculated from measurements of dc electric conductivity, impedance arcs, and dielectric modulus data may be associated with thermally activated oxygen vacancies.

Improvement of Dielectric Breakdown Strength in (1-x)Sr0.7Ba0.3Nb2O6-xSr0.7Bi0.2TiO3 Ceramics

2020 ◽  
Vol 842 ◽  
pp. 153-159
Author(s):  
Lei Cao ◽  
Ying Yuan ◽  
En Zhu Li ◽  
Shu Ren Zhang
Keyword(s):  
Energy Storage ◽  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Relaxor Behavior ◽  
Energy Storage Density ◽  
Dielectric Breakdown Strength ◽  
Storage Density ◽  
Storage Performance

In this work, a series of (1-x)Sr0.7Ba0.3Nb2O6-xSr0.7Bi0.2TiO3 ceramics were formulated by a phase-mixed sintering, the microstructure and energy storage performance were studied. The introduction of SBT induces the formation of equiaxed crystals leading to the denser microstructure, thus improving the dielectric breakdown strength. In addition, the enhancement of relaxor behavior improves the energy storage performance. For 0.94Sr0.7Ba0.3Nb2O6-0.06Sr0.7Bi0.2TiO3, an energy storage density of 0.49J/cm3 and an efficiency of 94.2% were achieved.

Bimetallic nickel cobalt selenides: a new kind of electroactive material for high-power energy storage

2015 ◽  
Vol 3 (47) ◽  
pp. 23653-23659 ◽  
Author(s):  
Haichao Chen ◽  
Si Chen ◽  
Meiqiang Fan ◽  
Chao Li ◽  
Da Chen ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Power ◽  
Power Delivery ◽  
Electroactive Material ◽  
Storage Performance ◽  
Nickel Cobalt ◽  
First Time

For the first time, bimetallic Ni–Co selenides are synthesized and show improved power-delivery and energy-storage performance.

Ergodic Relaxor State with High Energy Storage Performance Induced by Doping Sr0.85Bi0.1TiO3 in Bi0.5Na0.5TiO3 Ceramics

2016 ◽  
Vol 45 (10) ◽  
pp. 5146-5151 ◽  
Author(s):  
Qing-Ning Li ◽  
Chong-Rong Zhou ◽  
Ji-Wen Xu ◽  
Ling Yang ◽  
Xin Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Energy ◽  
Storage Performance ◽  
Relaxor State ◽  
High Energy Storage
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