Energy Storage Materials
·
2021
·
IF 17.789
Jie Jiang,Xiangjun Meng,Ling Li,Shun Guo,Ming Huang,Ji Zhang,Jing Wang,Xihong Hao,Heguo Zhu,Shan-Tao Zhang
Dielectric capacitors have drawn growing attention for their wide application in future high power and/or pulsed power electronic systems. However, the recoverable energy storage density ( W rec ) for dielectric ceramics is relatively low up to now, which largely restricts their actual application. Herein, the domain engineering is employed to construct relaxor antiferroelectric NaNbO 3 -BiFeO 3 bulk ceramics, which integrates the merits of antiferroelectrics and relaxors. It is revealed that the antiferroelectric phase transforms from orthorhombic P to R phase, and antiferroelectric domain evolves from micron-sized blocks to nanoscale clusters. Of particular importance is that the 0.90NaNbO 3 –0.10BiFeO 3 ceramic demonstrates ultrahigh W rec of 18.5 J cm −3 with giant electric breakdown strength of 99.5 kV mm −1 , which is superior than state-of-the-art bulk dielectric ceramics. Moreover, the 0.90NaNbO 3 –0.10BiFeO 3 ceramic exhibits superior frequency, cycling and thermal reliability, as well as the substantial current density (2140.6 A cm −2 ), ultrahigh power density (428.1 MW cm −3 ) and ultrafast discharge rate (14 ns). These results not only suggest that the NaNbO 3 -based relaxor antiferroelectric ceramics are promising candidates for advanced energy storage capacitors, but also provide feasible strategy of domain engineering to develop novel lead-free high-performance dielectric materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Jing Wang,Yu Rao,Xuhui Fan,Jin Zhang,Lei Zhao,Kongjun Zhu
AgNbO 3 -based ceramics have been the spotlight for the lead-free dielectric capacitors due to its unique antiferroelectric feature and the ever-increasing environmental concerns. Herein, synergic modulation on the energy storage properties of AgNbO 3 -based ceramics was reported, in which the over-stoichiometrical introduction of only 0.10 wt% MnO 2 at the atomic-scale leads to reduced leakage current, P r and enhanced antiferroelectric stability while the SiO 2 coating on the AgNbO 3 particles at the micro-scale greatly inhibits the grain growth, increases the breakdown strength and the electric filed inducing the AFE-FE transitions. As a result, a large recoverable energy density up to 3.34 J/cm 3 with efficiency of 60.0% was obtained in 0.10 wt% MnO 2 -doped AgNbO 3 @SiO 2 ceramic, which is 2.3 times larger than that of the pristine AgNbO 3 . This work provides a rational approach to synergically modulate the energy storage properties.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-9
·
IF 16.6
Liu Yi,Ma Yu,Zeng Xi,Xu Haojie,Guo Wuqian,Wang Beibei,Hua Lina,Tang Liwei,Luo Junhua,Sun Zhihua
Halide double perovskites have recently emerged as an environmentally green candidate toward electronic and optoelectronic applications owing to their non-toxicity and versatile physical merits, whereas study on high-temperature antiferroelectric (AFE) with excellent anti-breakdown property remains a huge blank in this booming family. Herein, we present the first high-temperature AFE of the lead-free halide double perovskites, (CHMA) 2 CsAgBiBr 7 ( 1 , where CHMA + is cyclohexylmethylammonium), by incorporating a flexible organic spacer cation. The typical double P-E hysteresis loops and J-E curves reveal its concrete high-temperature AFE behaviors, giving large polarizations of ~4.2 μC/cm 2 and a high Curie temperature of 378 K. Such merits are on the highest level of molecular AFE materials. Particularly, the dynamic motional ordering of CHMA + cation contributes to the formation of antipolar alignment and high electric breakdown field strength up to ~205 kV/cm with fatigue endurance over 10 4 cycles, almost outperforming the vast majority of molecule counterparts. This is the first demonstration of high-temperature AFE properties in the halide double perovskites, which will promote the exploration of new “green” candidates for anti-breakdown energy storage capacitor.
研究领域:
材料科学
·
能源存储
·
物理化学
✓ 已验证
DOI
高影响因子
Nanoscale Horizons
·
2025
·Vol. 10
·期 3
·561-567
·
IF 6.6
Yu Xing,Haoshen Ye,Guowei Du,Xu Li,Le-Ping Miao,Junchao Zhang,Xiong Luo,Xiyu Chen,Haoran Ye,Aoli Shen,Zhicheng Wang,Yumeng You,Shuai Dong,Linglong Li
The coexistence of electric and magnetic orders with intrinsic coupling, referred to as magnetoelectric coupling in multiferroics, has been extensively studied in oxide materials but remains relatively unexplored in van der Waals materials. Among these, CuCrP2S6 (CCPS) is notable for its emergent antiferromagnetic (AFM) and antiferroelectric (AFE) characteristics. However, investigations into magnetoelectric coupling in CCPS are limited, and the effects of dopants on its magnetic properties have yet to be fully addressed. In this study, we synthesized CuCr1−xFexP2S6 (CCFPS) samples using the chemical vapor transport (CVT) method to investigate the influence of iron doping on the magnetic and nonlinear optical properties of the CCFPS system. Our results indicate that the AFM state is preserved, while the Néel temperature (TN) varies with the doping concentration. First-principles calculations were employed to assess the exchange interactions among magnetic atoms. Notably, for samples with doping concentrations x < 0.5, we observed both magnetic-dielectric coupling and second harmonic generation (SHG) effects. However, these effects were absent at higher doping levels. Furthermore, our analysis revealed a distinct odd–even dependence of SHG, suggesting the presence of interlayer symmetry-breaking coupling. These findings advance our understanding of two-dimensional (2D) multiferroic materials and lay the groundwork for designing and optimizing magnetoelectric coupling materials with enhanced performance.
研究领域:
凝聚态物理
·
材料科学
·
二维材料
·
多铁材料
·
自旋电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）