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学者姓名：侯育冬
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Abstract ：
High-entropy strategy is emerging as a feasible and effective way for designing functional ceramics with outstanding piezoelectric properties via disordering composition distribution through increasing in atomic species. However, there still showing a huge difference in piezoelectric properties of different systems with the same configuration entropy value (Delta S), which may be related to the binding type of chemical bond caused by different element species, ionic radius, and electronegativity, etc. Herein, the chemical bonding engineering is proposed to decipher the influence mechanism of bond heterogeneity and hybrid inhomogeneity on the properties of KNN-based piezoelectric materials with the same Delta S. The results indicated that a larger differences in bond lengths may cause larger local ferroelectric distortion, which was beneficial to maintain the lattice asymmetry and result in an increased energy barrier, thus improving the thermal stability of piezoelectricity; and the introduction of a small amount of weakly hybridized bonding in isentropic ceramic system may soften the local short-range repulsions and promote the off-centering displacement of neighboring Nb to hybridize with O, leading to the enhancement of the overall chemical bond and bringing outstanding piezoelectric/dielectric response. Importantly, the cantilever piezoelectric energy harvester assembled by the optimized KNN-based piezoceramic displays outstanding temperature stability of power generation (the output current density decreased only 19.26 % from 25 to 100 degrees C) and anti-fatigue properties (stable up to 104 cycles). Overall, this pivotal strategy provides meaningful insight into the design of functional ceramics via the chemical bonding engineering.
Keyword ：
Energy harvesting performance Energy harvesting performance Chemical bonding engineering Chemical bonding engineering Entropy configuration Entropy configuration Lead-free piezoceramics Lead-free piezoceramics
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| GB/T 7714 | Xi, Kaibiao , Hou, Yudong , Zheng, Mupeng et al. Chemical bonding engineering renders optimizing energy harvesting performance in isentropic lead-free nanogenerators [J]. | NANO ENERGY , 2025 , 138 . |
| MLA | Xi, Kaibiao et al. "Chemical bonding engineering renders optimizing energy harvesting performance in isentropic lead-free nanogenerators" . | NANO ENERGY 138 (2025) . |
| APA | Xi, Kaibiao , Hou, Yudong , Zheng, Mupeng , Zhu, Mankang . Chemical bonding engineering renders optimizing energy harvesting performance in isentropic lead-free nanogenerators . | NANO ENERGY , 2025 , 138 . |
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Abstract ：
Linear dielectrics get wide attention in the field of high-voltage dielectric energy storage due to their high electrical breakdown resistance; but its low polarization feature inherited from the quasi-elastic ionic polarization limits their practicality. A simple isovalent substitution route enhancing the field-induced polarization and energy storage performance of linear dielectric Sr0.65Ca0.35Zr0.875Ti0.125O3 ceramics was put forward in this study. By incorporating 20 mol.% Ba2 + cations in A-site, sample Ba0.2(Sr0.65Ca0.35)0.8Zr0.875Ti0.125O3 realizes a high recoverable energy density of 3.40 J/cm3 and high efficiency over 90 %, accompanied with excellent temperature stability. The introduced Ba2+ cations promote the orthorhombic and pseudo-cubic coexistence and reduce the lattice transition energy, which enhance the field-induced polarization while keeping the linear dielectric nature. This simple isovalent substitution route provides important insights into improving the field- induced polarization of a linear dielectric.
Keyword ：
Isovalent substituion Isovalent substituion Dielectric energy storage Dielectric energy storage (Ca,Sr)(Ti,Zr)O3 ceramics (Ca,Sr)(Ti,Zr)O3 ceramics Linear dielectric Linear dielectric
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| GB/T 7714 | Zhao, Jiyu , Zhu, Mankang , Li, Yexin et al. Simple isovalent substitution route enhancing energy storage performance of linear dielectric ceramics [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2025 , 1016 . |
| MLA | Zhao, Jiyu et al. "Simple isovalent substitution route enhancing energy storage performance of linear dielectric ceramics" . | JOURNAL OF ALLOYS AND COMPOUNDS 1016 (2025) . |
| APA | Zhao, Jiyu , Zhu, Mankang , Li, Yexin , Zheng, Mupeng , Hou, Yudong . Simple isovalent substitution route enhancing energy storage performance of linear dielectric ceramics . | JOURNAL OF ALLOYS AND COMPOUNDS , 2025 , 1016 . |
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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 ：
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 ：
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 ：
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 ：
一种兼具高储能性能和负电容温度系数的介电陶瓷材料及制备，属于多功能多层陶瓷电容器领域。化学式BaTiO3‑BaZrO3‑CaTiO3，优选20BaTiO3‑40BaZrO3‑40CaTiO3，称取适量的BaCO3、CaCO3、TiO2和ZrO2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目筛后压制成型，保温3h排出胶体，随后在高温炉空气气氛中烧结，保温4h后，随炉自然冷却至室温。本发明有效提高了介质材料的击穿场强和电容温度线性度，同时获得高储能性能和负电容温度系数，为多功能多层陶瓷电容器介质材料设计提供了新思路。
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| GB/T 7714 | 侯育冬 , 刘嘉成 , 于肖乐 et al. 一种兼具高储能性能和负电容温度系数的介电陶瓷材料及制备 : CN202310250235.5[P]. | 2023-03-15 . |
| MLA | 侯育冬 et al. "一种兼具高储能性能和负电容温度系数的介电陶瓷材料及制备" : CN202310250235.5. | 2023-03-15 . |
| APA | 侯育冬 , 刘嘉成 , 于肖乐 , 朱满康 , 席凯彪 , 郑木鹏 . 一种兼具高储能性能和负电容温度系数的介电陶瓷材料及制备 : CN202310250235.5. | 2023-03-15 . |
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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 ：
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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