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学者姓名：侯育冬
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Abstract ：
The core of realizing large output power density (u) of piezoelectric energy harvesters (PEHs) is to develop piezoceramics with a high figure of merit (FoM(33), =d(33)(2)/epsilon(0)epsilon(r)). However, the challenge of achieving high piezoelectric constant (d(33)) accompanied with low dielectric constant (epsilon(r)) still exists and greatly restricts the energy harvesting applications of piezoceramics. Herein, a strategy combining morphotropic phase boundary (MPB) construction and ferroelectric polarization modulation is proposed, resulting in the decoupling of d(33) and epsilon(r). A large FoM(33) similar to 17.4 pm(2)/N is achieved in the Pb(Zn1/3Nb2/3)(0.1)(Hf0.49Ti0.51)(0.9)O-3 (PZNHT) MPB component with a high Curie temperature of 311 degrees C, which is superior to that of most typical perovskite piezoceramics. Benefitting from this, the PEH assembled by the PZNHT ceramic exhibits a higher output power density (u similar to 5.6 mW/cm(3)) than many reported PEHs. This work provides a useful reference for the development of piezoelectric materials with excellent energy harvesting characteristics.
Keyword ：
Energy harvesting Energy harvesting Figure of merit Figure of merit Piezoceramic Piezoceramic Ferroelectric polarization Ferroelectric polarization Morphotropic phase boundary Morphotropic phase boundary
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| GB/T 7714 | Yu, Xiaole , Xi, Kaibiao , Xu, Wenlong et al. Outstanding energy harvesting figure of merit and power density in perovskite-type Pb[(Zn1/3Nb2/3),(Hf0.49Ti0.51)]O3 piezoceramics [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 1010 . |
| MLA | Yu, Xiaole et al. "Outstanding energy harvesting figure of merit and power density in perovskite-type Pb[(Zn1/3Nb2/3),(Hf0.49Ti0.51)]O3 piezoceramics" . | JOURNAL OF ALLOYS AND COMPOUNDS 1010 (2024) . |
| APA | Yu, Xiaole , Xi, Kaibiao , Xu, Wenlong , Zheng, Mupeng , Zhu, Mankang , Hou, Yudong . Outstanding energy harvesting figure of merit and power density in perovskite-type Pb[(Zn1/3Nb2/3),(Hf0.49Ti0.51)]O3 piezoceramics . | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 1010 . |
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Abstract ：
High depolarization temperature (T-d) and low dielectric loss (tan delta) were obtained in Sc2O3/BiScO3-PbTiO3-Bi(Zn1/2Hf1/2)O-3 (Sc2O3/BS-PT-BZH) high-temperature fine-grained composite piezoceramics prepared by high-energy ball milling and one-step pressureless sintering. The heterogeneous interfacial polarization effect and thermal stress between the Sc2O3 semiconductor secondary phase and the BS-PT-BZH perovskite piezoelectric matrix phase contribute to the polarization orientation of the ferroelectric domain in the electric field and the maintenance of the poled ferroelectric domain state under temperature excitation, respectively. Benefiting from the above two heterogeneous interfacial effects, the Sc2O3/BS-PT-BZH fine-grained (similar to 0.4 mu m) ceramic exhibits a high T-d of 349 degrees C, a low tan delta of 5.1 % and a moderate piezoelectric constant d(33) of 495 pC/N, which are comparable to those of many BS-PT-based coarse-grained (>2 mu m) ceramics. The advent of Sc2O3/BS-PT-BZH fine-grained piezoceramic is helpful to promote the development of high-performance miniaturized high-temperature piezoelectric devices.
Keyword ：
Depolarization temperature Depolarization temperature Fine-grain Fine-grain Piezoelectric ceramics Piezoelectric ceramics Dielectric loss Dielectric loss High-temperature High-temperature
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| GB/T 7714 | Yu, Xiaole , Xi, Kaibiao , Zheng, Mupeng et al. High depolarization temperature and low dielectric loss in high-temperature fine-grain composite piezoceramics [J]. | SCRIPTA MATERIALIA , 2024 , 254 . |
| MLA | Yu, Xiaole et al. "High depolarization temperature and low dielectric loss in high-temperature fine-grain composite piezoceramics" . | SCRIPTA MATERIALIA 254 (2024) . |
| APA | Yu, Xiaole , Xi, Kaibiao , Zheng, Mupeng , Zhu, Mankang , Hou, Yudong . High depolarization temperature and low dielectric loss in high-temperature fine-grain composite piezoceramics . | SCRIPTA MATERIALIA , 2024 , 254 . |
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Abstract ：
Piezoceramics with a high depolarization temperature (T-d) and excellent piezoelectricity are ideal materials for constructing advanced high-temperature piezoelectric energy harvesters (HT-PEHs). Herein, the Bi(Zn1/2Ti1/2)O-3 (BZT) unit with a large tetragonality was added into the BiScO3-PbTiO3 (BS-PT) high-temperature piezoelectric matrix under the guidance of morphotropic phase boundary (MPB) manipulation and a lattice distortion modulation strategy. Based on the dual effects of linear expansion of MPB and the enhancement of lattice tetragonality, the perovskite-type 0.36BS-0.62PT-0.02BZT MPB composition shows a T-d of up to 418 degrees C and a large high-temperature piezoelectric constant (d(33)) of 932 pC N-1. The above comprehensive high-temperature characteristics are far superior to those of most reported perovskite piezoceramics. Moreover, the HT-PEH assembled using the 0.36BS-0.62PT-0.02BZT MPB ceramic exhibits excellent output power density of 80 mu W cm(-3) and ability to drive microelectronic devices even at 400 degrees C. This work demonstrates that the BS-PT-BZT material is a promising candidate for high-temperature piezoelectric energy harvesting applications.
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| GB/T 7714 | Wang, Huizhong , Yu, Xiaole , Zheng, Mupeng et al. High depolarization temperature and large piezoelectricity in BiScO3-PbTiO3-Bi(Zn1/2Ti1/2)O3 piezoelectric energy harvesting ceramics [J]. | JOURNAL OF MATERIALS CHEMISTRY C , 2024 , 12 (43) : 17595-17602 . |
| MLA | Wang, Huizhong et al. "High depolarization temperature and large piezoelectricity in BiScO3-PbTiO3-Bi(Zn1/2Ti1/2)O3 piezoelectric energy harvesting ceramics" . | JOURNAL OF MATERIALS CHEMISTRY C 12 . 43 (2024) : 17595-17602 . |
| APA | Wang, Huizhong , Yu, Xiaole , Zheng, Mupeng , Zhu, Mankang , Hou, Yudong . High depolarization temperature and large piezoelectricity in BiScO3-PbTiO3-Bi(Zn1/2Ti1/2)O3 piezoelectric energy harvesting ceramics . | JOURNAL OF MATERIALS CHEMISTRY C , 2024 , 12 (43) , 17595-17602 . |
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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 ：
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 ：
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 ：
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 ：
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 ：
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 ：
一种三元钛酸铋钠基高介超宽温无铅多层陶瓷电容器介质材料及制备，应用于陶瓷电容器领域。根据化学式(1‑x)(0.8Bi0.5Na0.5TiO3‑0.2Bi0.5K0.5TiO3)‑xNaTaO3，x＝0.3。称取Bi2O3、Na2CO3、K2CO3、TiO2和Ta2O5作为起始原料。高温煅烧后，研钵粉碎，再二次球磨将粉体研细，使用聚乙烯醇缩丁醛酒精溶液作粘结剂造粒，过120目筛压制成型，保温3小时排出胶体，随后在高温炉空气气氛中烧结，保温2小时后，随炉自然冷却至室温。本发明操作方法简单，制备周期短，不含铅等对环境有毒有害物质。
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| GB/T 7714 | 侯育冬 , 刘嘉成 , 于肖乐 et al. 一种三元钛酸铋钠基高介超宽温无铅多层陶瓷电容器介质材料及制备 : CN202210311214.5[P]. | 2022-03-28 . |
| MLA | 侯育冬 et al. "一种三元钛酸铋钠基高介超宽温无铅多层陶瓷电容器介质材料及制备" : CN202210311214.5. | 2022-03-28 . |
| APA | 侯育冬 , 刘嘉成 , 于肖乐 , 朱满康 , 郑木鹏 . 一种三元钛酸铋钠基高介超宽温无铅多层陶瓷电容器介质材料及制备 : CN202210311214.5. | 2022-03-28 . |
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