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学者姓名：侯育冬
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Abstract ：
Dielectrics of the polymer-matrix composite are considered to present combined advantages from both the polymer matrix and inorganic fillers. However, the breakdown strength, as well as energy density, is not effectively enhanced due to the poor compatibility between the organic and inorganic components. Herein, polymer composites derived from polystyrene (PS) and barium titanate (BTO) are proposed and beneficial interface modification by poly(styrene-co-maleic anhydride) (PS-co-mah) is conducted to improve compatibility between the inorganic filler and polymer matrix. The results show that the BTO@PS-co-mah/PS composites, in which the interfacial layer of PS-co-mah would undergo chemical reactions with the aminated BTO and blend PS matrix with excellent physical compatibility, exhibit enhanced breakdown strength and declined dielectric loss compared with both pure PS and BTO/PS without interfacial modulation. Particularly, the BTO@PS-co-mah/PS composite with 5 wt% filler content indicates optimized performance with an E-b of 507 MV m(-1) and tan delta of 0.085%. It is deduced that the deep energy traps introduced by the PS-co-mah layer would weaken the local electric field and suppress the space charge transporting so as to optimize the performance of composites. Consequently, the interfacial-modified BTO@PS-co-mah/PS would present great potential for applications, such as film capacitors.
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| GB/T 7714 | Liu, Xuepeng , Tong, Hui , Luo, Jinpeng et al. Interface modified BTO@PS-co-mah/PS composite dielectrics with enhanced breakdown strength and ultralow dielectric loss [J]. | RSC ADVANCES , 2023 , 13 (2) : 1278-1287 . |
| MLA | Liu, Xuepeng et al. "Interface modified BTO@PS-co-mah/PS composite dielectrics with enhanced breakdown strength and ultralow dielectric loss" . | RSC ADVANCES 13 . 2 (2023) : 1278-1287 . |
| APA | Liu, Xuepeng , Tong, Hui , Luo, Jinpeng , Zhu, Jiafeng , Cao, Shimo , Xu, Ju et al. Interface modified BTO@PS-co-mah/PS composite dielectrics with enhanced breakdown strength and ultralow dielectric loss . | RSC ADVANCES , 2023 , 13 (2) , 1278-1287 . |
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Abstract ：
Flexible hybridized nanogenerators (FHNGs) with multifunctional piezocomposites as core can simultaneously harvest waste mechanical energy and thermal energy in the environment, which are expected to replace chemical batteries to realize a long-term self-power supply of wearable electronic devices. However, most reported piezocomposites filled with low-dimensional ferroelectric particles have low piezoelectric charge coefficients together with poor thermal conductivity, which are not conducive to improving the hybridized generation power. In this work, an effective design strategy with respect to a reduced graphene oxide (rGO) nanosheet-decorated three-dimensional (3-D) samarium-doped Pb(Mg1/3Nb2/3)O-3-PbTiO3 (Sm-PMN-PT) piezoceramic skeleton is proposed to build high-performance polydimethylsiloxane (PDMS)-based FHNGs. On the one hand, rGO nanosheets with high electrical conductivity can form an internal electric field network to assist artificial polarization of the piezoceramic skeleton to enhance the piezoelectric properties. On the other hand, rGO nanosheets with high thermal conductivity can form a heat-transfer network to increase the rate of temperature change over time and improve the pyroelectric properties. Thanks to the coupling enhancement effect associated with rGO nanosheets, highly efficient concurrent mechanical energy harvesting (similar to 0.53 V), and thermal energy harvesting (similar to 0.151 V) were realized in the Sm-PMN-PT/PDMS/rGO piezocomposite, and the total output voltage of the FHNG under hybrid excitation was as high as 0.705 V, providing a promising paradigm for the development of high-performance FHNG materials.
Keyword ：
flexible hybridized nanogenerators flexible hybridized nanogenerators multifield coupling multifield coupling reduced grapheneoxide nanosheets reduced grapheneoxide nanosheets piezoelectricand pyroelectric performance piezoelectricand pyroelectric performance piezoceramic skeleton piezoceramic skeleton
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| GB/T 7714 | Xu, Hui , Xi, Kaibiao , Gao, Xin et al. Flexible Hybridized Nanogenerators Based on a Reduced Graphene Oxide Nanosheet-Decorated Piezoceramic Skeleton to Impact Mechanical and Thermal Energy Harvesting [J]. | ACS APPLIED NANO MATERIALS , 2023 , 7 (1) : 1120-1129 . |
| MLA | Xu, Hui et al. "Flexible Hybridized Nanogenerators Based on a Reduced Graphene Oxide Nanosheet-Decorated Piezoceramic Skeleton to Impact Mechanical and Thermal Energy Harvesting" . | ACS APPLIED NANO MATERIALS 7 . 1 (2023) : 1120-1129 . |
| APA | Xu, Hui , Xi, Kaibiao , Gao, Xin , Yu, Xiaole , Zheng, Mupeng , Zhu, Mankang et al. Flexible Hybridized Nanogenerators Based on a Reduced Graphene Oxide Nanosheet-Decorated Piezoceramic Skeleton to Impact Mechanical and Thermal Energy Harvesting . | ACS APPLIED NANO MATERIALS , 2023 , 7 (1) , 1120-1129 . |
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Abstract ：
Lead-free piezoceramics with a temperature-insensitive figure of merit (FOM = d(2)/epsilon) are urgently required to build a new generation of piezoelectric energy harvesters (PEHs) that can be used for environmental protection and new energy applications. Although (K,Na)NbO3 (KNN)-based ceramics are among the most promising lead-free piezoelectric candidates, the piezoelectric charge constant (d(33)) and dielectric constant (epsilon(r)) of KNN with an individual orthorhombic (O) phase exhibit opposite change trends in a certain temperature range, resulting in FOM with poor temperature stability. To break this bottleneck, a diffuse multiphase coexistence (DMC) strategy is proposed to realize a temperature-insensitive FOM. By constructing a DMC-featured orthorhombic-tetragonal (O-T) phase boundary associated with a hierarchical domain configuration, the temperature-driven synergistic variation of d(33) and epsilon(r) was realized in the 0.965(K0.48Na0.52)NbO3-0.035(Bi0.5Li0.5)ZrO3 (KNN-BLZ) system. Benefiting from an excellent temperature-insensitive FOM, the power density of the cantilever beam-type PEH produced by KNN-BLZ obtained a record value of 865 mu W cm(-3) at 80 degrees C, which was superior to the reported value of approximately 380 mu W cm(-3) for KNN-based PEHs measured at room temperature. These results pave the way for applications of KNN-BLZ piezoceramics, and also greatly impact our understanding of the strong correlations between the thermal stability of DMC structure and temperature-dependent energy-harvesting properties.
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| GB/T 7714 | Xi, Kaibiao , Hou, Yudong , Yu, Xiaole et al. Diffuse multiphase coexistence renders temperature-insensitive lead-free energy-harvesting piezoceramics [J]. | JOURNAL OF MATERIALS CHEMISTRY A , 2023 , 11 (7) : 3556-3564 . |
| MLA | Xi, Kaibiao et al. "Diffuse multiphase coexistence renders temperature-insensitive lead-free energy-harvesting piezoceramics" . | JOURNAL OF MATERIALS CHEMISTRY A 11 . 7 (2023) : 3556-3564 . |
| APA | Xi, Kaibiao , Hou, Yudong , Yu, Xiaole , Zheng, Mupeng , Zhu, Mankang . Diffuse multiphase coexistence renders temperature-insensitive lead-free energy-harvesting piezoceramics . | JOURNAL OF MATERIALS CHEMISTRY A , 2023 , 11 (7) , 3556-3564 . |
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Abstract ：
It is an urgent need to develop lead-free piezoelectric energy harvesters (PEHs) to address the energy dilemma and meet environmental protection requirements. However, the low output power densities limit further promotion of lead-free PEHs for use in daily life. Here, an entropy-increasing strategy is proposed to achieve an increased output power density of 819 mu W/cm(3) in lead-free potassium sodium niobate (KNN)-based piezoceramics by increasing the configuration entropy and realizing nearly two times the growth compared with low-entropy counterparts. Evolution of the energy-harvesting performance with increasing configuration entropy is demonstrated systematically, and the excellent energy-harvesting properties achieved are attributed to the enhanced lattice distortion, the flexible polarization configuration, and the high-density randomly distributed nanodomains with the entropy-increasing effect. Moreover, excellent vibration fatigue resistance and variable temperature output power characteristics were also realized in the PEH prepared by the proposed entropy-increasing material. The significant enhancement of the comprehensive energy-harvesting performance demonstrates that the construction of KNN-based ceramics with high configuration entropy represents an effective and convenient strategy to enable design of high-performance piezoceramics and thus promotes the development of advanced PEHs.
Keyword ：
configuration entropy configuration entropy piezoelectric energy harvester piezoelectric energy harvester lead-free piezoceramics lead-free piezoceramics output power density output power density potassium sodium niobate potassium sodium niobate
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| GB/T 7714 | Xi, Kaibiao , Hou, Yudong , Yu, Xiaole et al. Optimizing Output Power Density in Lead-Free Energy-Harvesting Piezoceramics with an Entropy-Increasing Polymorphic Phase Transition Structure [J]. | ACS APPLIED MATERIALS & INTERFACES , 2023 , 15 (44) : 51330-51338 . |
| MLA | Xi, Kaibiao et al. "Optimizing Output Power Density in Lead-Free Energy-Harvesting Piezoceramics with an Entropy-Increasing Polymorphic Phase Transition Structure" . | ACS APPLIED MATERIALS & INTERFACES 15 . 44 (2023) : 51330-51338 . |
| APA | Xi, Kaibiao , Hou, Yudong , Yu, Xiaole , Zheng, Mupeng , Zhu, Mankang . Optimizing Output Power Density in Lead-Free Energy-Harvesting Piezoceramics with an Entropy-Increasing Polymorphic Phase Transition Structure . | ACS APPLIED MATERIALS & INTERFACES , 2023 , 15 (44) , 51330-51338 . |
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Abstract ：
High-performance polymer-based piezoelectric nanogenerators (PENGs) are urgently needed in the field of wearable electronics to realize the self-powering of microsensors. However, the output power density of the existing classical 0-3-type PENGs is still low, which becomes a bottleneck for the application of such devices. This work achieves a large increase in the output power density of the PENGs by adopting a strategy that rationally tunes the orientation of the three-dimensional (3D) interconnected piezoceramic skeletons in the polymer matrix. In our experiments, the popular Sm-doped PMN-PT (Pb0.9625Sm0.025[(Mg1/3Nb2/3)(0.71)Ti-0.29]O-3) piezoceramic was selected as the filler, the elastic PDMS polymer was used as the matrix, and three characteristic oriented 3D skeletons were constructed based on the freeze-casting process, namely the isotropic porous (IP) structure, the uniaxial aligned lamellar (UAL) structure, and the long-range aligned lamellar (LAL) structure. It was found that the output power density of the UAL PENG is the most prominent, which is about 1.5 times that of the LAL PENG and 4 times that of the IP PENG. Theoretical analysis confirmed that the characteristic lamellar cross-linking mode in the UAL piezocomposite can significantly enhance the stress-transfer effect, resulting in a large increase of the piezoelectric potential. This work provides a promising paradigm for the design of 3D interconnected structures in piezocomposites for PENG applications.
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| GB/T 7714 | Xu, Hui , Hou, Yudong , Yu, Xiaole et al. Enhancing the output power density of piezocomposite nanogenerators through rational tuning of the 3D interconnected skeleton structure [J]. | JOURNAL OF MATERIALS CHEMISTRY C , 2022 , 10 (40) : 15035-15043 . |
| MLA | Xu, Hui et al. "Enhancing the output power density of piezocomposite nanogenerators through rational tuning of the 3D interconnected skeleton structure" . | JOURNAL OF MATERIALS CHEMISTRY C 10 . 40 (2022) : 15035-15043 . |
| APA | Xu, Hui , Hou, Yudong , Yu, Xiaole , Gao, Xin , Zheng, Mupeng , Zhu, Mankang . Enhancing the output power density of piezocomposite nanogenerators through rational tuning of the 3D interconnected skeleton structure . | JOURNAL OF MATERIALS CHEMISTRY C , 2022 , 10 (40) , 15035-15043 . |
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Abstract ：
Piezoelectric energy harvesters (PEHs) are important for wireless sensors to achieve self-powering, for which the piezoceramics must not only have a large figure of merit (FOM = d(2)/epsilon) to produce high energy density but also strong mechanical properties to prevent fatigue failure. To address the above-mentioned points, a lead-free composite ZrO2/(1 - x)(K0.48Na0.52)(Nb0.96Sb0.04)O-3-x(Bi0.5Na0.5)ZrO3 (ZrO2/(1 - x)KNNS-xBNZ) was designed. The optimal x = 0.04 sample exhibited enhanced fracture toughness (K-IC = 1.36 MPa m(1/2)) and an elevated figure of merit (FOM = 4827 x 10(-15) m(2) N-1) owing to the toughening of the ZrO2/perovskite composite and the formation of polymorphic phase transition (PPT) with a hierarchical domain configuration. The cantilever beam-type PEH made using the x = 0.04 ceramic showed a high-power density of 380 mu W cm(-3) together with excellent fatigue resistance and is suitable to be used as an environment-friendly PEH instead of batteries to realize self-energy supply in wireless sensors.
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| GB/T 7714 | Xi, Kaibiao , Hou, Yudong , Yu, Xiaole et al. Excellent power generation and enhanced mechanical properties in PPT-structured Pb-free piezoceramics with ZrO2 inclusions [J]. | JOURNAL OF MATERIALS CHEMISTRY C , 2022 , 10 (34) : 12359-12366 . |
| MLA | Xi, Kaibiao et al. "Excellent power generation and enhanced mechanical properties in PPT-structured Pb-free piezoceramics with ZrO2 inclusions" . | JOURNAL OF MATERIALS CHEMISTRY C 10 . 34 (2022) : 12359-12366 . |
| APA | Xi, Kaibiao , Hou, Yudong , Yu, Xiaole , Zheng, Mupeng , Zhu, Mankang . Excellent power generation and enhanced mechanical properties in PPT-structured Pb-free piezoceramics with ZrO2 inclusions . | JOURNAL OF MATERIALS CHEMISTRY C , 2022 , 10 (34) , 12359-12366 . |
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Abstract ：
采用铌铁矿前驱体两步法制备了Pb(Zn_(1/3)Nb_(2/3))_(0.2)(Hf_(1-x)Ti_x)_(0.8)O_3(PZNH_(1-x)T_x)钙钛矿压电陶瓷，研究了铪钛比对陶瓷相结构、电学性能和能量收集特性的影响。结果表明，当x=0.52时，陶瓷样品位于准同型相界，具有最优综合压电性能：居里温度T_C=287℃,品质因数FOM≈14 753×10~(-15) m~2/N,压电电荷常数d_(33)=492 pC/N。由该组成材料构建的悬臂梁型压电能量收集器输出功率密度高达4.16μW/mm~3,所转化的电能可成功点亮138盏并联的LED灯。结果表明，PZNHT陶瓷在压电能量收集领域...
Keyword ：
弛豫铁电体 弛豫铁电体 准同型相界 准同型相界 压电能量收集 压电能量收集 钙钛矿陶瓷 钙钛矿陶瓷 压电性 压电性
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| GB/T 7714 | 于肖乐 , 侯育冬 , 郑木鹏 et al. Pb(Zn_(1/3)Nb_(2/3))_(0.2)(Hf_(1-x)Ti_x)_(0.8)O_3陶瓷压电能量收集特性研究 [J]. | 压电与声光 , 2022 , 44 (04) : 600-604,609 . |
| MLA | 于肖乐 et al. "Pb(Zn_(1/3)Nb_(2/3))_(0.2)(Hf_(1-x)Ti_x)_(0.8)O_3陶瓷压电能量收集特性研究" . | 压电与声光 44 . 04 (2022) : 600-604,609 . |
| APA | 于肖乐 , 侯育冬 , 郑木鹏 , 朱满康 . Pb(Zn_(1/3)Nb_(2/3))_(0.2)(Hf_(1-x)Ti_x)_(0.8)O_3陶瓷压电能量收集特性研究 . | 压电与声光 , 2022 , 44 (04) , 600-604,609 . |
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Abstract ：
(K, Na)NbO_3(KNN)基无铅压电陶瓷作为一种环境友好型材料，兼具较高的居里温度和可调控的相界结构，在压电器件领域展示出潜在的应用前景，引起了广泛关注和大量研究。对其物相组成、制备工艺、性能调控等方面的研究进展进行了评述，并重点介绍了其在压电器件领域的实际应用，最后对KNN及其在器件应用方面未来的研究和发展方向进行了总结展望。
Keyword ：
制备工艺 制备工艺 器件应用 器件应用 性能调控 性能调控 材料设计 材料设计 无铅压电陶瓷 无铅压电陶瓷
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| GB/T 7714 | 席凯彪 , 侯育冬 , 于肖乐 et al. 压电器件用KNN基无铅压电陶瓷的研究进展 [J]. | 压电与声光 , 2022 , 44 (04) : 557-564 . |
| MLA | 席凯彪 et al. "压电器件用KNN基无铅压电陶瓷的研究进展" . | 压电与声光 44 . 04 (2022) : 557-564 . |
| APA | 席凯彪 , 侯育冬 , 于肖乐 , 郑木鹏 , 朱满康 . 压电器件用KNN基无铅压电陶瓷的研究进展 . | 压电与声光 , 2022 , 44 (04) , 557-564 . |
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Abstract ：
High-temperature multilayer ceramic capacitors (HT-MLCCs) are indispensable key basic components in high-temperature electronic equipment. Obtaining practical HT-MLCCs requires not only a high-temperature dielectric with excellent temperature stability, but also a good match between the inner electrode and the dielectric. In this work, a quaternary lead-free system (1-x) (0.64Na(0.5)Bi(0.5)TiO(3)-0.16 K0.5Bi0.5TiO3-0.20Bi (Mg2/3Nb1/3)O-3)-xCaZrO(3) (NBT-KBT-BMN-xCZ) was investigated as candidates for high-temperature dielectric. The introduction of CZ can adjust the composition of different types of polar nanoregions (PNRs) and weaken the ferroelectric coupling behavior, thereby achieving the flattening of the dielectric temperature curve. Among all the components, NBT-KBT-BMN-0.06CZ (0.06CZ) has the most excellent high-temperature dielectric properties, and is further used to match the two inner electrodes of Pt and Ag/Pd to make HT-MLCCs. The results show that for Pt-MLCC, co-firing causes a second phase MgTi2O5 to appear at the heterogeneous interface, resulting in incomplete inner electrodes, lower dielectric permittivity and increased loss in the high-temperature region. In contrast, for Ag/Pd-MLCC, the heterogeneous interface is well bonded, the inner electrode is continuous and complete and there is no second phase, which makes the capacitor show excellent dielectric performance (epsilon(r) = 1393 +/- 15%, tan delta <= 0.025) over a wide range of 129-404 degrees C. This work provides an important solution for the development of a new generation of HT-MLCCs. (C) 2022 Elsevier B.V. All rights reserved.
Keyword ：
Multilayer ceramic capacitor Multilayer ceramic capacitor Inner electrode Inner electrode Na0.5Bi0.5TiO3 Na0.5Bi0.5TiO3 Lead-free relaxor Lead-free relaxor High-temperature dielectrics High-temperature dielectrics
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| GB/T 7714 | Fu, Yutong , Hou, Yudong , Song, Beibei et al. Construction of lead-free dielectrics for high temperature multilayer ceramic capacitors and its inner electrode matching characteristics [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 903 . |
| MLA | Fu, Yutong et al. "Construction of lead-free dielectrics for high temperature multilayer ceramic capacitors and its inner electrode matching characteristics" . | JOURNAL OF ALLOYS AND COMPOUNDS 903 (2022) . |
| APA | Fu, Yutong , Hou, Yudong , Song, Beibei , Cheng, Huarong , Liu, Xudong , Yu, Xiaole et al. Construction of lead-free dielectrics for high temperature multilayer ceramic capacitors and its inner electrode matching characteristics . | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 903 . |
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Abstract ：
Piezoelectric energy harvesting as an available technology for realizing self-powered microsensors has attracted increasing attention. However, the combination of large piezoelectricity and high-temperature stability is a huge challenge in perovskite ceramics for developing piezoelectric energy harvesters (PEHs) toward wide-temperature applications. Herein, a stress engineering strategy was proposed to address this problem by combining lattice stress and heterogeneous interface stress. Based on this concept, (Ni0.9Zn0.1) TiO3-modified Pb[(Zn1/3Nb2/3)(0.2)(Zr1/2Ti1/2)(0.8)]O-3 ceramic achieves both enhanced piezoelectricity and high-temperature stability (d(33) = 485 pC/N +/- 20%) over a wide temperature range of 24-250 degrees C, superior to the pristine counterpart and many state-of-the-art commercial lead zirconate titanate-based ceramics. This benefits from the hierarchical domains with high piezoelectric activity and temperature stability caused by stress engineering. Furthermore, the assembled corresponding PEH not only successfully drives a wireless monitoring and alarm system but also exhibits considerable power generation capacities (e.g., power density of up to 98.8 mu W/cm(3)) even at 250 degrees C. Our work may provide a pathway for developing high-performance perovskite materials with high piezoelectricity and thermal reliability toward high-temperature piezoelectric energy harvesting.
Keyword ：
energy harvesting energy harvesting perovskite materials perovskite materials stress engineering stress engineering piezoelectricity piezoelectricity temperature stability temperature stability
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| GB/T 7714 | Yu, Xiaole , Hou, Yudong , Zheng, Mupeng et al. Stress Engineering of Perovskite Ceramics for Enhanced Piezoelectricity and Temperature Stability toward Energy Harvesting [J]. | ACS APPLIED ELECTRONIC MATERIALS , 2022 , 4 (3) : 1359-1366 . |
| MLA | Yu, Xiaole et al. "Stress Engineering of Perovskite Ceramics for Enhanced Piezoelectricity and Temperature Stability toward Energy Harvesting" . | ACS APPLIED ELECTRONIC MATERIALS 4 . 3 (2022) : 1359-1366 . |
| APA | Yu, Xiaole , Hou, Yudong , Zheng, Mupeng , Zhu, Mankang . Stress Engineering of Perovskite Ceramics for Enhanced Piezoelectricity and Temperature Stability toward Energy Harvesting . | ACS APPLIED ELECTRONIC MATERIALS , 2022 , 4 (3) , 1359-1366 . |
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