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Flexible lead-free oxide film capacitors with ultrahigh energy storage performances in extremely wide operating temperature EI
期刊论文 | 2019 , 57 , 519-527 | Nano Energy
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Abstract :

Here, large-scaled flexible Ba(Zr0.35Ti0.65)O3 ferroelectric film capacitors not only exhibit ultrahigh energy storage performances but also have excellent mechanical flexibility and ferroelectric fatigue endurance. In ultra-wide temperature range from −100 °C to 200 °C, the flexible Ba(Zr0.35Ti0.65)O3 film capacitors show excellent thermal stability with recoverable energy density (Wrec) of over 65.1 J/cm3 and efficiency (η) of over 72.9%, which presents the highest Wrec obtained up to now not only in flexible polymer film dielectric capacitors but also in the ceramic film capacitors including lead-free and lead-based film capacitors on rigid substrates in this measuring temperature range. All these results demonstrate that the flexible Ba(Zr0.35Ti0.65)O3 film capacitors have huge potential in the applications of flexible electronics operated in cold polar regions, extreme altitudes and outer space, as well as high temperature regions. © 2018 Elsevier Ltd

Keyword :

Ceramic film capacitors Dielectric capacitors Flexible device High temperature Lead-free ferroelectrics Measuring temperature Mechanical flexibility Operating temperature

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GB/T 7714 Liang, Zhongshuai , Ma, Chunrui , Shen, Lvkang et al. Flexible lead-free oxide film capacitors with ultrahigh energy storage performances in extremely wide operating temperature [J]. | Nano Energy , 2019 , 57 : 519-527 .
MLA Liang, Zhongshuai et al. "Flexible lead-free oxide film capacitors with ultrahigh energy storage performances in extremely wide operating temperature" . | Nano Energy 57 (2019) : 519-527 .
APA Liang, Zhongshuai , Ma, Chunrui , Shen, Lvkang , Lu, Lu , Lu, Xiaoli , Lou, Xiaojie et al. Flexible lead-free oxide film capacitors with ultrahigh energy storage performances in extremely wide operating temperature . | Nano Energy , 2019 , 57 , 519-527 .
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Strain Coupling and Dynamic Relaxation in a Molecular Perovskite-Like Multiferroic Metal–Organic Framework EI Scopus
期刊论文 | 2018 | Advanced Functional Materials
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© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Magnetic metal–organic frameworks (MOFs) with a perovskite structure AMX3 are emerging single-phased multiferroics with different sources of magnetic and electric ordering. However, the atomic mechanism underlying the multiple ferroic coupling is convincingly clarified. In this work, large single crystals of [(CH3)2NH2][Ni(HCOO)3] are synthesized and shown to exhibit a first-order ferroelectric phase transition at ≈178 K during heating and at ≈151 K during cooling, as confirmed by temperature-dependent differential scanning calorimetry, Raman scattering, and X-ray diffraction studies. Resonant ultrasound spectroscopy (RUS) is used to investigate the elastic and anelastic properties between 5 and 300 K. The RUS results show an abrupt disappearance of resonance peaks above the ferroelectric transition point of ≈178 K. This is probably due to the unfreezing of dimethylammonium cation motion which couples with local strain. Small changes in elastic properties associated with two known magnetic transition at ≈35 and ≈15 K, respectively, are indicative of weak magnetoelastic coupling. An apparent peak in acoustic loss accompanying the canted antiferromagnetic ordering (≈35 K) and spin reorientation transition (≈15 K) is attributed to dynamical magnetoelastic coupling on the RUS time scale of ≈10−6 s. In comparison with the same MOF structures containing Mn2+ and Co2+, the smaller Ni2+ ions effectively generate an internal chemical pressure and induce a compressed ion force on the anion frameworks. This study opens up a new landscape to explore possibilities for ferroic-order coupling in molecular MOFs.

Keyword :

ferroelastic ferroelectric magnetoelastic coupling metal–organic frameworks multiferroic perovskite strain

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GB/T 7714 Xin, Lipeng , Zhang, Zhiying , Carpenter, Michael A. et al. Strain Coupling and Dynamic Relaxation in a Molecular Perovskite-Like Multiferroic Metal–Organic Framework [J]. | Advanced Functional Materials , 2018 .
MLA Xin, Lipeng et al. "Strain Coupling and Dynamic Relaxation in a Molecular Perovskite-Like Multiferroic Metal–Organic Framework" . | Advanced Functional Materials (2018) .
APA Xin, Lipeng , Zhang, Zhiying , Carpenter, Michael A. , Zhang, Ming , Jin, Feng , Zhang, Qingming et al. Strain Coupling and Dynamic Relaxation in a Molecular Perovskite-Like Multiferroic Metal–Organic Framework . | Advanced Functional Materials , 2018 .
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Enhanced piezoelectric, electrocaloric and energy storage properties at high temperature in lead-free Bi0.5(Na1-xKx)0.5TiO3 ceramics EI
期刊论文 | 2018 | Ceramics International
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Abstract :

The piezoelectric, electrocaloric and energy storage properties were systemically investigated in lead-free Bi0.5(Na1-xKx)0.5TiO3 ceramics from room temperature to high temperature region. These ceramics can be poled completely to obtain large piezoelectric coefficient (104–153 pC/N) at low electric field of ~30 kV/cm. The piezoelectric property shows good thermal stability due to high depolarization temperature (Td). For BNKT20, a large low electric field-induced strain of 0.36% is obtained at 120 °C under 50 kV/cm, the corresponding normalized strain coefficient is up to 720 pm/V, which is larger than other BNT-based ceramics at high temperature region. The electrocaloric properties of these ceramics are studied via indirect and direct methods. Large EC value (~1.08 K) in BNKT20 ceramic is obtained at 50 kV/cm using indirect calculation. Above 100 °C, the dielectric energy storage density and efficiency of BNKT20 is still up to ~0.85 J/cm3 and 0.75, respectively. The BNKTx ceramics may become promising candidates in the fields of actuators, electrocaloric cooling and energy storage at high temperature region. © 2018 Elsevier Ltd and Techna Group S.r.l.

Keyword :

Depolarization temperature Electric-field-induced strain Electrocaloric Energy storage properties Lead-Free Piezoelectric Piezoelectric coefficient Piezoelectric property

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GB/T 7714 Wang, Xiangjian , Gao, Hongcheng , Hao, Xihong et al. Enhanced piezoelectric, electrocaloric and energy storage properties at high temperature in lead-free Bi0.5(Na1-xKx)0.5TiO3 ceramics [J]. | Ceramics International , 2018 .
MLA Wang, Xiangjian et al. "Enhanced piezoelectric, electrocaloric and energy storage properties at high temperature in lead-free Bi0.5(Na1-xKx)0.5TiO3 ceramics" . | Ceramics International (2018) .
APA Wang, Xiangjian , Gao, Hongcheng , Hao, Xihong , Lou, Xiaojie . Enhanced piezoelectric, electrocaloric and energy storage properties at high temperature in lead-free Bi0.5(Na1-xKx)0.5TiO3 ceramics . | Ceramics International , 2018 .
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Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films EI SCIE Scopus
期刊论文 | 2015 , 106 (3) | APPLIED PHYSICS LETTERS | IF: 3.142
WoS CC Cited Count: 16
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We report the influence of epitaxial strain u(m) on the elastocaloric properties of BaTiO3 thin films. Using thermodynamic calculations, we show that there exists a critical compressive stress sigma(3c) at which the elastocaloric effect is maximized for any compressive misfit strain we investigate. Moreover, it is found that |sigma(3c)| decreases significantly with decreasing |u(m)|, which is accompanied by a reduction of the elastocaloric response. Interestingly, a several fold enhancement in the electrocaloric effect can be achieved for stress in proximity of sigma(3c). The elastocaloric effect predicted here may find potential cooling applications by combining the stress-mediated electrocaloric effect or designing hybrid elastocaloric/ electrocaloric devices in the future. (C) 2015 AIP Publishing LLC.

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GB/T 7714 Liu, Yang , Wei, Jie , Lou, Xiaojie et al. Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films [J]. | APPLIED PHYSICS LETTERS , 2015 , 106 (3) .
MLA Liu, Yang et al. "Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films" . | APPLIED PHYSICS LETTERS 106 . 3 (2015) .
APA Liu, Yang , Wei, Jie , Lou, Xiaojie , Bellaiche, L. , Scott, James F. , Dkhil, Brahim . Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films . | APPLIED PHYSICS LETTERS , 2015 , 106 (3) .
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Insight into Metalized Interfaces in Nano Devices by Surface Analytical Techniques EI SCIE PubMed Scopus
期刊论文 | 2015 , 7 (49) , 27351-27356 | ACS APPLIED MATERIALS & INTERFACES | IF: 7.145
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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Abstract :

Connections between metals and heterogeneous solid state materials form buried interfaces. These ubiquitous structures play an essential role in determining the performances of many nano- and microdevices. However, the information about the chemistry, structure, and properties of these real interfaces is intrinsically difficult to extract by traditional techniques. Therefore, approaches to efficiently discovering metalized interfaces are in high demand. Here, we demonstrate the transformation of nanoscale metal/oxide interface problems into surface problems through a novel metal-hydrogenation detaching method. We applied this technique to study the thickness dependence in Pb(Zr,Ti)O-3 (PZT) ferroelectric thin films, a long-standing interface problem in a model metal/insulator device,(1-6) and this allowed comprehensive surface analytical techniques to be adapted. A nonstoichiometric interfacial layer of 4.1 nm thick with low mass density, low permittivity, and weak ferro electricity was quantified at the Pt/PZT interface and attributed to the preferential diffusions among the compositional elements. Targeted interface engineering by Pb rebalance led to a substantial recovery of ferroelectric properties. Our results therefore pave the way to a better understanding of metallized interface in ferroelectric and dielectric nanodevices. We hope that more useful information about metalized interfaces of other solid materials could, analogously, be accessed by surface analytical techniques.

Keyword :

Pb(Zr,Ti)O-3 ferroelectric thin films targeted interface engineering metal/oxide interface thickness dependence metal-hydrogenation detaching method

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GB/T 7714 Xiang, Qing-Yun , Zhang, Kai , Wang, Yu et al. Insight into Metalized Interfaces in Nano Devices by Surface Analytical Techniques [J]. | ACS APPLIED MATERIALS & INTERFACES , 2015 , 7 (49) : 27351-27356 .
MLA Xiang, Qing-Yun et al. "Insight into Metalized Interfaces in Nano Devices by Surface Analytical Techniques" . | ACS APPLIED MATERIALS & INTERFACES 7 . 49 (2015) : 27351-27356 .
APA Xiang, Qing-Yun , Zhang, Kai , Wang, Yu , Lou, Xiao-Jie , Yao, Wen-Qing , Bai, Yang et al. Insight into Metalized Interfaces in Nano Devices by Surface Analytical Techniques . | ACS APPLIED MATERIALS & INTERFACES , 2015 , 7 (49) , 27351-27356 .
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Effective driving voltage on polarization fatigue in (Pb,La)(Zr,Ti)O-3 antiferroelectric thin films EI SCIE Scopus
期刊论文 | 2015 , 41 (1) , 109-114 | CERAMICS INTERNATIONAL | IF: 2.758
WoS CC Cited Count: 5 SCOPUS Cited Count: 5
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Abstract :

Polarization fatigue in (Pb0.97La0.02)(Zr0.95Ti0.05)O-3 (PLZT) antiferroelectric thin films deposited onto silicon wafers is studied by investigating the effect of the peak/average/root-mean-square cycling voltage through varying the waveform of the electrical excitation. Interestingly, it is found that the fatigue behavior of the film is determined by the root-mean-square voltage of the external driving excitation rather than by the peak or average voltages. Our results can be well explained in the framework of the local phase decomposition model and indicate that the root-mean-square voltage should be considered as the effective driving voltage determining the polarization fatigue in PLZT antiferroelectric films. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Keyword :

PLZT Fatigue Sol-gel processes

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GB/T 7714 Geng, Wenping , Lou, Xiaojie , Xu, Jianghong et al. Effective driving voltage on polarization fatigue in (Pb,La)(Zr,Ti)O-3 antiferroelectric thin films [J]. | CERAMICS INTERNATIONAL , 2015 , 41 (1) : 109-114 .
MLA Geng, Wenping et al. "Effective driving voltage on polarization fatigue in (Pb,La)(Zr,Ti)O-3 antiferroelectric thin films" . | CERAMICS INTERNATIONAL 41 . 1 (2015) : 109-114 .
APA Geng, Wenping , Lou, Xiaojie , Xu, Jianghong , Zhang, Fuping , Liu, Yang , Dkhil, Brahim et al. Effective driving voltage on polarization fatigue in (Pb,La)(Zr,Ti)O-3 antiferroelectric thin films . | CERAMICS INTERNATIONAL , 2015 , 41 (1) , 109-114 .
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Prediction of giant elastocaloric strength and stress-mediated electrocaloric effect in BaTiO3 single crystals SCIE Scopus
期刊论文 | 2014 , 90 (10) | PHYSICAL REVIEW B | IF: 3.736
WoS CC Cited Count: 26
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An applied stress field sigma(3) can reversibly change the temperature of an elastocaloric material under adiabatic conditions, and the temperature change Delta T-sigma 3 is usually maximized near phase transitions. Using a thermodynamic approach, we demonstrate that an elastocaloric strength alpha = vertical bar Delta T-sigma 3 vertical bar/vertical bar sigma(3)vertical bar of 0.016 K/MPa can be achieved benefiting from the full first-order phase transition in BaTiO3 single crystals, which is comparable with typical elastocaloric materials reported in the literature. The elastocaloric temperature change is found to be giant (3.2 K) under a stress of 200 MPa with a temperature span of over 50 K, which can be significantly larger than its electrocaloric counterpart (similar to 1 K). Moreover, it is found that the elastocaloric strength can be remarkably enhanced (2.32 K/MPa) as long as the phase transition is triggered even by a modest stress near the sharp first-order phase transition, which is two orders of magnitude larger than those accomplished by full transition. Therefore, even a low stress (< 30 MPa) can induce a modest elastocaloric effect (1.3 K) comparable with the electrocaloric counterpart, which is accompanied by a reduction of the working temperature span. In addition, it is found that the electrocaloric peak under tensile stresses moves towards higher temperatures with its magnitude slightly enhanced. Hopefully, our study will stimulate further investigations on elastocaloric and stress-mediated electrocaloric effects in ferroelectrics.

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GB/T 7714 Liu, Yang , Wei, Jie , Janolin, Pierre-Eymeric et al. Prediction of giant elastocaloric strength and stress-mediated electrocaloric effect in BaTiO3 single crystals [J]. | PHYSICAL REVIEW B , 2014 , 90 (10) .
MLA Liu, Yang et al. "Prediction of giant elastocaloric strength and stress-mediated electrocaloric effect in BaTiO3 single crystals" . | PHYSICAL REVIEW B 90 . 10 (2014) .
APA Liu, Yang , Wei, Jie , Janolin, Pierre-Eymeric , Infante, Ingrid C. , Kreisel, Jens , Lou, Xiaojie et al. Prediction of giant elastocaloric strength and stress-mediated electrocaloric effect in BaTiO3 single crystals . | PHYSICAL REVIEW B , 2014 , 90 (10) .
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Rayleigh-like nonlinear dielectric response and its evolution during electrical fatigue in antiferroelectric (Pb,La)(Zr,Ti)O-3 thin film EI SCIE Scopus
期刊论文 | 2014 , 104 (14) | APPLIED PHYSICS LETTERS | IF: 3.302
WoS CC Cited Count: 9
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The Rayleigh-like nonlinear dielectric response and its evolution during electrical fatigue were systematically studied in antiferroelectric (Pb,La)(Zr,Ti)O-3 thin film. It is shown that the nonlinearity of dielectric permittivity can be described by the Rayleigh law under subswitching conditions. Electrical fatigue tests demonstrate that both the saturated polarization and the reversible/irreversible Rayleigh parameters show significant degradation after 10(9) switching cycles. These phenomena could be explained by considering the growth of an interface degraded layer between the electrode and the film resulting from the charge injection induced by repetitive electrical switching during bipolar fatigue. (C) 2014 AIP Publishing LLC.

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GB/T 7714 Luo, Zhengdong , Lou, Xiaojie , Zhang, Fuping et al. Rayleigh-like nonlinear dielectric response and its evolution during electrical fatigue in antiferroelectric (Pb,La)(Zr,Ti)O-3 thin film [J]. | APPLIED PHYSICS LETTERS , 2014 , 104 (14) .
MLA Luo, Zhengdong et al. "Rayleigh-like nonlinear dielectric response and its evolution during electrical fatigue in antiferroelectric (Pb,La)(Zr,Ti)O-3 thin film" . | APPLIED PHYSICS LETTERS 104 . 14 (2014) .
APA Luo, Zhengdong , Lou, Xiaojie , Zhang, Fuping , Liu, Yang , Chang, Dingding , Liu, Chenqi et al. Rayleigh-like nonlinear dielectric response and its evolution during electrical fatigue in antiferroelectric (Pb,La)(Zr,Ti)O-3 thin film . | APPLIED PHYSICS LETTERS , 2014 , 104 (14) .
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New lead-free piezoelectric ceramics based on (K0.48Na0.52)(Nb0.95Ta0.05)O-3-Bi-0.5(Na0.7K0.2Li0.1)(0.5)ZrO3 EI SCIE Scopus
期刊论文 | 2014 , 43 (9) , 3434-3442 | DALTON TRANSACTIONS | IF: 4.197
WoS CC Cited Count: 17
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(1 - x)(K0.48Na0.52)(Nb0.95Ta0.05)O-3-xBi(0.5)(Na0.7K0.2Li0.1)(0.5)ZrO3 lead-free piezoelectric ceramics with a new type of phase boundary have been designed and fabricated. This phase boundary lies in the compositional range of 0.04 <= x <= 0.05, and is formed by the coexistence of the rhombohedral, orthorhombic, and tetragonal phases. Interestingly, we found that the ferroelectric, dielectric, and piezoelectric properties of the ceramics with compositions near the phase boundary are significantly enhanced. In particular, the ceramic with x = 0.045 shows the best piezoelectric behavior of d(33) similar to 290 pC/N and k(p) similar to 0.42 among all the compositions studied in this work, and it also exhibits a good thermal stability at annealing temperatures of <= 270 degrees C. All these results indicate that such a material system is a good candidate for lead-free piezoelectric applications in the future.

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GB/T 7714 Cheng, Xiaojing , Wu, Jiagang , Wang, Xiaopeng et al. New lead-free piezoelectric ceramics based on (K0.48Na0.52)(Nb0.95Ta0.05)O-3-Bi-0.5(Na0.7K0.2Li0.1)(0.5)ZrO3 [J]. | DALTON TRANSACTIONS , 2014 , 43 (9) : 3434-3442 .
MLA Cheng, Xiaojing et al. "New lead-free piezoelectric ceramics based on (K0.48Na0.52)(Nb0.95Ta0.05)O-3-Bi-0.5(Na0.7K0.2Li0.1)(0.5)ZrO3" . | DALTON TRANSACTIONS 43 . 9 (2014) : 3434-3442 .
APA Cheng, Xiaojing , Wu, Jiagang , Wang, Xiaopeng , Zhang, Binyu , Zhu, Jianguo , Xiao, Dingquan et al. New lead-free piezoelectric ceramics based on (K0.48Na0.52)(Nb0.95Ta0.05)O-3-Bi-0.5(Na0.7K0.2Li0.1)(0.5)ZrO3 . | DALTON TRANSACTIONS , 2014 , 43 (9) , 3434-3442 .
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Wide phase boundary zone, piezoelectric properties, and stability in 0.97(K0.4Na0.6)-(Nb1-xSbx)O-3-0.03Bi(0.5)Li(0.5)ZrO(3) lead-free ceramics EI SCIE Scopus
期刊论文 | 2014 , 43 (25) , 9419-9426 | DALTON TRANSACTIONS | IF: 4.197
WoS CC Cited Count: 25
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In this work, the rhombohedral (R) and tetragonal (T) phase boundary of the 0.97(K0.4Na0.6)(Nb1-xSbx) O-3-0.03Bi(0.5)Li(0.5)ZrO(3) piezoceramics has been attained in a wide composition range of 0.035 <= x <= 0.08, and the Sb5+ could simultaneously shrink its TR-O and TO-T. A giant d(33) of 380-405 pC N-1 and a T-C of 200-292 degrees C have been observed in the ceramics with the coexistence of both R and T phases. In addition, the ceramics with 0.035 <= x <= 0.08 also show a good thermal stability of the d(33), and an enhanced temperature stability of ferroelectricity could be observed in the ceramic with x = 0.035. As a result, adding the optimum antimony content is an efficient way to promote the electrical properties of potassium-sodium niobate ceramics with the R-T phase boundary.

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GB/T 7714 Zheng, Ting , Wu, Jiagang , Cheng, Xiaojing et al. Wide phase boundary zone, piezoelectric properties, and stability in 0.97(K0.4Na0.6)-(Nb1-xSbx)O-3-0.03Bi(0.5)Li(0.5)ZrO(3) lead-free ceramics [J]. | DALTON TRANSACTIONS , 2014 , 43 (25) : 9419-9426 .
MLA Zheng, Ting et al. "Wide phase boundary zone, piezoelectric properties, and stability in 0.97(K0.4Na0.6)-(Nb1-xSbx)O-3-0.03Bi(0.5)Li(0.5)ZrO(3) lead-free ceramics" . | DALTON TRANSACTIONS 43 . 25 (2014) : 9419-9426 .
APA Zheng, Ting , Wu, Jiagang , Cheng, Xiaojing , Wang, Xiaopeng , Zhang, Binyu , Xiao, Dingquan et al. Wide phase boundary zone, piezoelectric properties, and stability in 0.97(K0.4Na0.6)-(Nb1-xSbx)O-3-0.03Bi(0.5)Li(0.5)ZrO(3) lead-free ceramics . | DALTON TRANSACTIONS , 2014 , 43 (25) , 9419-9426 .
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