Article
Materials Science, Multidisciplinary
K. Dey, A. Tripathy, S. R. Sahu, H. Srivastava, A. Sagdeo, J. Strempfer, D. K. Shukla
Summary: Local structural symmetries in Pb-free BaZrxTi1-xO3 materials at the nanoscale were studied using pair distribution function measurements. Nanoscale correlated regions of monoclinic symmetry and curved frustrated nanodomains were observed. The average structure of the material was found to have coexisting monoclinic and rhombohedral symmetries.
Article
Chemistry, Physical
Ruiyi Jing, Qingyuan Hu, Leiyang Zhang, Yuan Sun, Jiagang Wu, D. O. Alikin, V. Ya Shur, Xiaoyong Wei, Hongliang Du, Yunfei Chang, Li Jin
Summary: This study presents a ferroelectric ceramic material with high electrostrain and excellent thermal stability at high temperatures, dominated by the intrinsic electrostrictive effect. In-situ piezoelectric force microscopy reveals highly stable domain structures, ensuring thermal stability of the electrostrain in NN-xBCZT ferroelectric ceramics.
JOURNAL OF MATERIOMICS
(2022)
Article
Materials Science, Multidisciplinary
Ravi Kashikar, P. S. Ghosh, S. Lisenkov, A. Stroppa, I. Ponomareva
Summary: First-principles density functional theory calculations were used to predict the Rashba effects in a lead-free hybrid organic-inorganic perovskite MPSnBr3. The material exhibited polar monoclinic structure with spontaneous polarization and spin splitting near the band edges. The spin textures in the conduction and valence band had different topology and were coupled to the direction of spontaneous polarization. This study revealed the potential applications of MPSnBr3 in spintronics and quantum computing.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhi Tan, Jie Xing, Yuting Peng, Qiming Zhang, Jianguo Zhu
Summary: Polarization rotation is found to be directly correlated with the shear piezoelectric constant in lead-free perovskite ferroelectrics, with a larger rotation angle leading to a higher shear piezoelectric constant. The atomic insight reveals that the rotation mainly relies on the reorientation of Nb and O atoms. The importance of the orthorhombic structure in this process is emphasized, suggesting a specific rotation path for polarization vector in high-performance lead-free piezoelectric materials.
Article
Chemistry, Physical
Juliana G. Maier, Ahmed Gadelmawla, Neamul H. Khansur, Kyle G. Webber
Summary: This study investigated the stress-modulated energy storage properties of lead-free polycrystalline Ba0.85Ca0.15Zr0.1Ti0.9O3 as a function of temperature. The applied uniaxial compressive stress of -160 MPa increased the recoverable energy storage density by 226% to a maximum value of 274 mJ/cm3 and enhanced the energy storage efficiency by approximately 10% to a value of 88.2%. The stress-induced tailoring of energy storage performance can be utilized to enhance the recoverable energy density and reduce the hysteretic losses in other nonlinear dielectric ceramics.
JOURNAL OF MATERIOMICS
(2023)
Article
Multidisciplinary Sciences
Le Van Lich, Tinh Quoc Bui, Takahiro Shimada, Takayuki Kitamura, Hue Dang Thi Hong, Trong-Giang Nguyen, Van-Hai Dinh
Summary: A phase field model for nonlinearly graded ferroelectric thin films has been developed based on the Ginzburg-Landau theory. The model has been validated through simulations and comparison with experimental data, showing enhanced electromechanical properties due to controlled gradient index. Furthermore, an increase in energy storage density and charge-discharge efficiency has been observed with higher gradient index of thin films.
ADVANCED THEORY AND SIMULATIONS
(2022)
Article
Engineering, Environmental
Wenjing Qiao, Zhizhi Xu, Weizhi Yuan, Junbo Xu, Yangfei Gao, Mei Bai, Xiaopei Zhu, Yanhua Hu, Xiaojie Lou
Summary: The high entropy strategy has been proposed to improve the energy storage characteristics of perovskite dielectric capacitors. By increasing the configurational entropy and delaying polarization saturation, the strategy has achieved ultra-high recoverable energy storage density and high efficiency. The inclusion of Ba(5 M)O high entropy oxides has resulted in improved polarization characteristics, increased breakdown field, and enhanced energy storage density and efficiency. Furthermore, the high entropy strategy has demonstrated excellent thermal stability, frequency stability, and fatigue endurance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Songhua Cai, Changqing Guo, Ben Niu, Lin Xie, Christopher Addiego, Di Wu, Peng Wang, Shu Ping Lau, Houbing Huang, Xiaoqing Pan
Summary: Ferroelectric oxide films, as a potential candidate for next-generation nonvolatile memory devices, show many emergent phenomena with functional applications, making it crucial to understand polarization switching and domain evolution behaviors. However, tracking domain wall motion with high spatial resolution remains challenging. This study presents an in situ biasing approach that allows direct atomic-scale observations of domain nucleation and sideways motion. By accurately controlling the applied electric field, the lateral speed of the domain wall can be observed with atomic resolution STEM imaging. The study also reveals the unique creeping behavior and morphology variation of the domain wall under a critical electric field.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Peng Shi, Xiaopei Zhu, Xiaojie Lou, Bian Yang, Qida Liu, Chuncai Kong, Sen Yang, Liqiang He, Ruirui Kang, Jiantuo Zhao
Summary: The study introduces a strategy to prepare lead-free relaxor ferroelectric ceramics with ultra-high energy storage properties and superior temperature stability by adjusting the relaxation and ferroelectricity states and increasing the electric field intensity. The experimental results show that the ceramic exhibits high recoverable energy storage density and efficiency, as well as good cycle stability. Additionally, the ceramic demonstrates a high discharge power density and good charge and discharge performance, which is essential for practical applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Wen Wang, Leiyang Zhang, Chao Li, D. O. Alikin, V. Ya. Shur, Xiaoyong Wei, Feng Gao, Hongliang Du, Li Jin
Summary: A collaborative optimization strategy was proposed to improve the energy storage performance of (Ba0.8Sr0.2)TiO3-based RFE ceramics by introducing Bi(Mg0.5Zr0.5)O-3 and using a viscous polymer process. The strategy resulted in exceptional energy storage parameters, including high recoverable energy density and energy efficiency, while maintaining stable temperature stability. The performance of BMZ15VPP indicates its competitiveness in advanced pulsed power capacitor systems, demonstrating the feasibility of this strategy in designing composite high energy storage ceramic systems.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Zhe Wang, Jinyan Zhao, Gang Niu, Wei Ren, Nan Zhang, Kun Zheng, Yi Quan, Lingyan Wang, Jian Zhuang, Henghui Cai, Xin Li, Genshui Wang, Ming Liu, Zhuangde Jiang, Yulong Zhao
Summary: Lead-free bismuth sodium titanite (Bi0.5Na0.5)TiO3-based piezoelectric thin films, specifically (1 - x)(Bi0.5Na0.5)TiO3-xBaZrO(3) (x = 0.02, 0.04, 0.06 and 0.07, BNT-100xBZ) were successfully fabricated using the sol-gel method. The influence of the BZ contents on the dielectric and piezoelectric properties of the thin films was investigated. The results showed that the BNT-4BZ thin films exhibited a giant macro-scale strain value and a relatively lower dielectric loss, along with a coexistence of ferroelectric phase and relaxor characteristics. These findings are of great significance for improving the strain response and reducing the dielectric loss in lead-free thin films for various piezoelectric device applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Aiwen Xie, Ruzhong Zuo, Zhenliang Qiao, Zhengqian Fu, Tengfei Hu, Linfeng Fei
Summary: This study achieved high energy density, high efficiency, and ultrafast discharge rate in relaxor ferroelectric ceramics by introducing various polarization configurations and microstructure modification. The energy-storage performance was attributed to the presence of different-scale polar nanodomains, a nonpolar matrix, and delayed polarization saturation, ensuring a linear-like polarization response within a wide field and temperature range.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Dohyung Kim, Anton Ievlev, Olga S. Ovchinnikova, Sergei Kalinin, Mahshid Ahmadi
Summary: The unique physical properties of two-dimensional metal halide perovskites make them promising candidates for multifunctional applications. This study explored the underlying mechanisms of light-ferroelectricity interaction in 4,4-difluoropiperidinium lead iodide perovskite thin films. It was found that the ferroelectricity weakens under illumination due to changes in domain structures, lattice plane orientation, and chemical composition.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Multidisciplinary
Mariya Aleksandrova, Ivailo Pandiev
Summary: This paper discusses impedance measurements of ferroelectric structures involving lead-free oxide and polymer-oxide composite coatings for sensing and energy harvesting applications. Three different ferroelectric materials grown on solid or flexible substrates are investigated for their basic resonant characteristics, with equivalent electrical circuit models applied to explain their electrical behavior. Temperature and frequency dependences of the dielectric permittivity and losses are also measured for the polymer-oxide composite device.
Article
Physics, Condensed Matter
Qian Chen, Ruizhi Zhang, Jie Xu, Shuyao Cao, Yiting Guo, Jie Kong, Feng Gao
Summary: The polarizability and spontaneous polarization of high-valent cations doped KSr2Nb5O15 lead-free tetragonal tungsten bronze ferroelectrics are calculated using first principles and experimental results. The results show good agreement between calculated polarizability based on dielectric constants and experimental values, especially for trivalent cation doping structures. The reliability of prediction is confirmed by the consistency between spontaneous polarization calculated using first principles and experimental results.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Ahsan Ali, Shehzad Ahmed, Junaid-ur Rehman, Muhammad Raies Abdullah, Hao-Bin Chen, Baolin Guo, Yaodong Yang
Summary: The quaternary Cu2BaSnS4 quantum dots exhibit efficient photocatalysis in the visible light region for degradation of organic contaminants. The optimized composition with Ba = 0.6 shows a bandgap of 2.6 eV, enabling significant degradation of pollutants. The large surface area and reactive oxygen species of CBTS make it capable of disinfecting large amounts of bacteria strains, indicating its potential in photoelectrochemical, photovoltaic, and biological applications.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yuting Wang, Junning Li, Ruihao Yuan, Hongcheng Gao, Jing Lv, Dezhen Xue, Xihong Hao, Yaodong Yang, Turab Lookman, Brahim Dkhil, Xiaojie Lou
Summary: In this study, CuO additive was introduced to lead-free BaSn0.11Ti0.89O3 (BST) ferroelectric ceramic, resulting in a significantly large adiabatic temperature change under a relatively low electric field. This work demonstrates the potential for enhancing the electrocaloric effect by tuning the intrinsic properties of EC materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Min Gao, Yaodong Yang, Wei-Feng Rao, D. Viehland
Summary: ME VANs, self-assembled from piezoelectric perovskite and magnetostrictive spinel phases, exhibit unique pillar-array-like morphologies and enhanced ME properties, offering potential applications in microelectronics. The microstructure formation mechanisms of ME VANs have been explored through phase field simulations, along with effective approaches to modify and improve ME properties discussed. Potential applications include field tunable adaptive microelectronics and multistate memory devices.
Article
Engineering, Environmental
Bian Yang, Haobin Chen, Yaodong Yang, Lei Wang, Jihong Bian, Qida Liu, Xiaojie Lou
Summary: By modifying with the PVP surfactant, the ferroelectric material SBT-0.3 exhibits enhanced performance in collecting energy sources from mechanical friction and temperature fluctuation to promote water recovery efficiency. The combination of permanent polarization and piezo-/pyro-potential in SBT-0.3 reduces charge recombination, aids in the reaction with active oxygen to breakdown organic molecules, and improves water purification efficiency.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Jinxu Du, Haobin Chen, Yaodong Yang, Wei-Feng Rao
Summary: This study demonstrates the relationship between the output, physical parameters, and working frequency of piezoelectric materials in vibration energy harvest systems through experimental data and machine learning algorithms. It provides assistance in designing efficient energy harvest systems.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Bian Yang, Jiayu Zhang, Xiaojie Lou, Yangfei Gao, Peng Shi, Yaodong Yang, Man Yang, Jie Cui, Lingling Wei, Shaodong Sun
Summary: In this study, a lead-free Sb-modified tungsten bronze ceramic was designed and fabricated to enhance the relaxor characteristics. The incorporation of Sb induced structural distortion and order-disorder distribution, resulting in improved breakdown strength and remarkable energy storage performance at high power and current density.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Mingyuan Wang, Yaodong Yang, Enkai Dai, Wei-Feng Rao
Summary: This study proposes a method of converting human body actions into electrical energy via a ball impact piezoelectric energy converter, and optimizes its performance using an artificial neural network model. Treadmill experiments verify the prediction results of the model and demonstrate an effective voltage of 11.3 V.
Article
Chemistry, Multidisciplinary
Yajing Wang, Yaodong Yang, Shuaipeng Suo, Mingyuan Wang, Weifeng Rao
Summary: This paper proposes a demonstration of using a high-throughput blockchain to store the fingerprints of 3D models and verify them before printing, in order to prevent illegal tampering. The combination of blockchain and 3D printing ensures the security of the models and the credibility of the terminal components, and enables a more flexible manufacturing for future industry.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Ceramics
Jindong Dou, Junjie Li, Jianting Li, Hui Zhang, Yaodong Yang, Yang Bai, Wei-Feng Rao
Summary: In this study, a self-actuating dual cooling cycle system was proposed, combining the positive and negative electrocaloric effects (ECE) and electrostrain (ES) in a 0.7 Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-30PT) single crystal. It was found that a suitable reverse electric field can generate negative ECE and ES simultaneously, enhancing the cooling capacity of the system. The optimal reverse electric field (-Eop) can improve the total ECE and ES by 31% and 17% respectively.
CERAMICS INTERNATIONAL
(2023)
Review
Chemistry, Multidisciplinary
Ahsan Ali, Longbin Chen, Muhammad Salman Nasir, Chao Wu, Baolin Guo, Yaodong Yang
Summary: This article reviews an overlooked method, piezocatalysis, for degrading organic pollutants and inhibiting bacteria. Recent research has shown significant progress in the properties of piezoelectric materials, allowing for efficient charge carrier generation and fast reactions mediated by reactive oxygen species. The paper discusses the properties of piezoelectric materials, methods for water treatment, and the piezocatalytic mechanism with a focus on charge generation, cavitation, and bacterial inactivation by reactive oxygen species. Applications for dye and pathogenic bacteria removal are also presented.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Bian Yang, Yangfei Gao, Xiaojie Lou, Yaodong Yang, Yanhua Hu, Guojun Zhang, Shaodong Sun
Summary: Simultaneously integrating outstanding energy storage performance and good temperature stability in advanced ferroelectrics is a promising strategy to boost the practical application for next-generation high-temperature pulse devices. However, these constraints cannot happen hand-in-hand, and the realization of high-performance dielectric capacitors always comes at the expense of high-temperature tolerance due to thermal breakdown, leading to that the trade-off relationship as above mentioned was not substantially relieved in perovskite relaxor materials.
ENERGY STORAGE MATERIALS
(2023)
Article
Engineering, Chemical
Longbin Chen, Pengqi Hai, Yaodong Yang, Chao Wu, Yongming Hu, Wei-Feng Rao
Summary: Combining metal with ferroelectrics is an effective strategy to significantly improve the photocatalytic water splitting efficiency of ferroelectrics. In this study, we fabricated SrBi4Ti4O15 (SBTO) nanosheets and deposited different quantities of Pt nanoparticles to form heterojunctions, aiming to find the optimal Pt loading ratio. The optoelectronic characterizations confirmed that the Pt-modified SBTO nanosheets exhibited broadened absorption of visible light and generated more long-lived charge carriers. The photocatalytic hydrogen production reached 11700 μmol g(-1) with continuous illumination for 3 hours from the sample containing 6 wt% Pt, which demonstrated a much higher hydrogen evolution rate compared to other ferroelectric materials in similar reaction systems. Our work provides a valuable and feasible solution for hydrogen production from water.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Xuhan Lv, Yaodong Yang, Dongcai Zhang, Ziliang Wang, Kailin Li, Weifeng Rao
Summary: To solve the mismatch between external excitation and the resonant frequency of a harvester, a ratchet spring structure is designed to capture waves from a wide range of frequencies (1-19.7 Hz) and convert them into the resonant frequency of cantilevers. This energy harvester effectively alleviates hazardous problems caused by sudden changes in wave frequency and shows promising potential to power marine sensors, with a good power output (19.44 mW). Advanced design tools, including artificial neural network algorithms, were used for parameter optimization.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Liang Wang, Jindong Dou, Yaodong Yang, Jianting Li, Wei-Feng Rao
Summary: Sonocatalysis is attracting much attention for its ability to completely decompose organic matter without causing secondary contamination, but there are still differing opinions on the factors influencing sonocatalysis. The role of the piezoelectric coefficient in the sonocatalytic process needs to be clarified. In order to understand the influence of the piezoelectric coefficient, experiments were conducted using Na0.5Bi0.5TiO3-xSrTiO3 (NBT-xST, 0.20 <= x <= 0.30) with different piezoelectric coefficients and different phase states (ferroelectric phase/relaxor). The results showed a significant correlation between the piezoelectric coefficient and the catalytic performance in the ferroelectric phase, but more influencing factors need to be considered in the relaxor region.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Bian Yang, Jiayu Zhang, Xiaojie Lou, Yangfei Gao, Peng Shi, Yaodong Yang, Man Yang, Jie Cui, Lingling Wei, Shaodong Sun
Summary: A lead-free tungsten bronze ceramic material was designed and fabricated with enhanced relaxor characteristics using a B-site engineering strategy. It exhibited superior comprehensive performance and stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
