CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Haochen Sun,Yingzhi Meng,Feifei Han,Silin Tang,Xiuyun Lei,Qingqing Ke,Dingyuan Wang,Yisong Bai,Biaolin Peng,Xue Chen,Xiang Niu,Shengguo Lu,Laijun Liu
Electrocaloric refrigeration technology has garnered significant attention due to its potential for next-generation solid-state cooling, which is miniaturized and efficient. However, achieving a substantial electrocaloric effect (ECE) and a wide working temperature range at low electric fields remains a challenge. In this study, a synergistic approach combining domain and defect engineering was used in transparent 0.88 Pb(Mg 1/3 Nb 2/3 )O 3 -0.12PbTiO 3 - x Sm(0.88PMN-0.12 PT- x Sm) ceramics to improve ECE and temperature stability. Finally, a notable adiabatic temperature change ( ΔT ) of 2.07 K in the x = 0.01 ceramic, with ΔT exceeding 1.0 K across a broad temperature range from 30 to 180 °C was achieved. Piezoresponse force microscopy (PFM) and X-ray photoelectron spectroscopy revealed the presence of small domains and appropriate oxygen vacancies as contributors to the enhanced ECE and broad operation temperature range. This work introduces a promising candidate material for electrocaloric refrigeration.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Xinyu Zhao,Chongyang Li,Jikang Liu,Yuqing Ding,Wangfeng Bai,Peng Zheng,Peng Li,Jingji Zhang,Jiwei Zhai
High energy storage and charge-discharge performances under low electric field are desirable for lead-free dielectric materials because of environmental hazards, the risk of high voltage and the high cost of insulation technology. Herein, lead-free ceramics based on 0.6BNT-0.4Sr 0.775 Bi 0.15 TiO 3 (BNT-SBT) were designed, which simultaneously achieves a large energy storage density ( W rec ~ 2.41 J/cm 3 ) and a high efficiency ( η ~87.5%) under a low electric field of 190 kV/cm due to enhanced dielectric properties and the relaxation response. Moreover, the energy storage properties of the BNT-SBT ceramic exhibit moderate temperature stability, excellent frequency dependence, and cycling reliability. Furthermore, the charge-discharge performance simultaneously features a high power density ( P D ~51.4 MW/cm 3 ), an ultrafast discharge speed ( t 0.9 –77 ns), and remarkable stability against temperature and cycling. This study exploits a high-efficiency BNT-related ceramics with concurrently high energy storage and charge-discharge performances under low electric fields, which provides great potential in practical dielectric capacitor applications.
研究领域:
材料科学
·
电介质物理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 16
·21164-21177
·
IF 2.478
Liu Jikang,Ding Yuqing,Li Chongyang,Bai Wangfeng,Zheng Peng,Zhang Jingji,Zhai Jiwei
Although high-applied electric field can usually generate high energy storage performance (ESP) for most dielectric materials, the presence of high risk at high electric field and large cost of insulation technology are the main obstacles that critically restrict the actual applications of dielectric ceramics in the energy storage area. Herein, simultaneously realizing high energy storage density ( W rec )/efficiency ( η ) and charge–discharge performance under low working electric fields is proposed in relaxor ferroelectrics via combining the non-ergodic and ergodic relaxor state (NR-ER) and dominated ER features. Based on this idea, a high W rec (2.03 J/cm 3 ) and favorable η (72%), together with excellent frequency dependence (0.5–100 Hz), moderate temperature stability (20–140 °C, and satisfactory fatigue endurance (10 0 –10 5 cycles), can be simultaneously achieved in 0.3[0.955(Bi 0.5 Na 0.5 )TiO 3 –0.045Ba(Al 0.5 Ta 0.5 )O 3 ]–0.7Sr 0.3 (Bi 0.7 Na 0.67 Li 0.03 ) 0.5 TiO 3 (BNT–BAT–0.7SBNLT) ceramic at a low electric field of 200 kV/cm. Moreover, the indicated ceramics also possess great charge–discharge performance at 140 kV/cm, featured by a large power density P D of 46.2 MW/cm 3 , discharge energy density W d of 0.62 J/cm 3 , fast charge-discharge rate t 0.9 of 210 ns, and excellent cycling reliability. Thus, the designed BNT–BAT–0.7SBNLT ceramic possesses superior comprehensive ESP under low electric field, which has broad prospects in practical high-power ceramic capacitors applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 46
·25484-25496
·
IF 11.9
Hongyan Wan,Zenghui Liu,Fangping Zhuo,Jingwen Xi,Pan Gao,Kun Zheng,Luyue Jiang,Jun Xu,Jingrui Li,Jie Zhang,Jian Zhuang,Gang Niu,Nan Zhang,Wei Ren,Zuo-Guang Ye
Antiferroelectric (AFE) materials have gained significant attention due to their potential multifunctionality. However, prototypical AFE materials, such as PbHfO3, suffer from poor sinterability, complex structures, and a high critical electric field, making it difficult for them to achieve expected performances. Here we adopt a synergistic design strategy, namely by inducing ferroelectrically active ions into the PbHfO3 structural matrix to soften the AFE order and induce a large maximum polarization, to enable the development of novel PbHfO3-based AFE materials of high performance suitable for applications under low electric fields. To implement this strategy, a novel solid solution of (1 − x)PbHfO3–xPb(Zn1/2W1/2)O3 is designed and prepared by the solid-state reaction method. Its crystal structure, microstructures, energy storage and strain performances, and phase transition behaviors are systematically investigated from both experimental and theoretical aspects. The resulting material exhibits a high recoverable energy storage density of 5.03 J cm−3 and a large strain of 0.60% under a relatively low electric field of 200 kV cm−1, which proves the effectiveness of our synergistic strategy. Phenomenological modeling investigation associates these performances with the sharp jump in induced polarization and strain, which is consistent with the experimental results. This work not only results in a novel AFE candidate material for high energy storage and strain applications but also, more importantly, opens up a new way to design high-performance AFE materials with multifunctionality via softening the AFE order.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hua Wang,Zhichao Hu,Junhong Pan,Qian Liu,Chengli Sun,Chaowei Zhong,Enzhu Li
High-power applications, particularly in electromagnetic catapults, electric vehicles, and aerospace, necessitate the use of polymer dielectrics that demonstrate reliable performance in high-temperature environments. This study focuses on synthesizing three distinct morphologies of innovative wide-bandgap high-dielectric materials—hydroxyapatite (HAP). By conducting a combination of experiments and Multiphysics finite element simulations, a comprehensive comparison was made regarding the properties exhibited by three polyimide (PI) composites: PI/sea urchin-like HAP, PI/spherical HAP, and PI/rodlike HAP. The incorporation of high-surface-area spherical HAP or high aspect ratio rodlike HAP introduces intricate and convoluted growth paths for electric tree formation within the PI matrix, thereby augmenting the energy storage density ( U e ) at elevated temperatures ( U η > 90% = 4.82 J/cm 3 , U η > 80% = 6.11 J/cm 3 , U η > 70% = 8.73 J/cm 3 , at 150 ℃). The incorporation of HAP increases the dielectric constant ε r to a maximum value of 4.96 in pure PI matrices, enabling the resulting PI/HAP composites to achieve remarkable values for both U e (4.82 J/cm 3 ) and η (92.4 %) even under low electric field ( E ) conditions (350 MV/m). The PI/HAP composite film demonstrates high energy storage density under low E , offering an innovative solution for energy storage applications in film capacitors operating in high-temperature environments.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2020
·
IF 3.333
Leipeng Liu,Ying Lei,Zhicheng Zhang,Jinru Liu,Shenghua Lv,Ziyi Guo
Since dielectric elastomers (DEs) can undergo muscle-like actuation under external electric fields, they show promising applications in fields such as actuators, generators, and biomimetic robots. However, traditional DEs require strong electric fields and pre-stretching to deliver useful deformation, limiting their practical applications. Herein, a novel method for preparing polydimethylsiloxane (PDMS) composites with high actuation under low electric field without pre-stretching is reported. In this method, polydopamine (PDA) is used to modify sandwich-structured silicon dioxide@graphite oxide hybrids (PDA@SiO 2 @GO). The inclusion of the SiO 2 layer improves the dielectric constant and reduces the dielectric loss of the composite, while the PDA shell improves the dispersibility of the filler. The PDA@SiO 2 @rGO/PDMS composite containing 5 wt% PDA@SiO 2 @GO exhibits a large actuated strain of 14.23% under an electric field of 33.19 kV/mm without pre-stretching; this value is 465% larger than that of pure PDMS and superior to those of most reported DEs composites. The results provide a promising new route to prepare high-performance DEs.
研究领域:
材料科学
·
智能材料
·
仿生机器人
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2018
·
IF 5.16
Zeyu Li,Feihua Liu,Guang Yang,He Li,Lijie Dong,Chuanxi Xiong,Qing Wang
Polymer nanocomposite dielectrics with high energy densities have shown great potential in electrical energy storage applications. However, these high energy densities are normally achieved at ultrahigh applied electric fields (≥400 MV/m), which is inconvenient for certain applications such as aerospace power systems and microelectronics. In this study, uniform BaTiO 3 nanofibers (BT nfs) with a large aspect ratio were prepared via the electrospinning method , surface modified by poly(vinyl pyrrolidone) (PVP) and utilized as the fillers in the poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) nanocomposites. It is found that the nanocomposite with 3 vol% BT nfs possesses a much enhanced discharged energy density of 8.55 J/cm 3 at an applied electric field of 300 MV/m, which is 43% higher than that of the neat polymer matrix (i.e. 5.98 J/cm 3 ) and more than four times that of the commercial biaxial oriented polypropylene dielectric (2 J/cm 3 at over 600 MV/m). Comparative studies have been performed on the corresponding nanocomposites with BT nanoparticle fillers and pristine BT nfs. The improved energy storage performance is ascribed to the synergetic effects of surface modification and large aspect ratio of BT nfs. Our research provides a facile and effective approach to high-performance electrical energy storage materials which work efficiently at relatively low operating voltages.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 13
·6070-6078
·
IF 8.867
Bing Xie,Haibo Zhang,Qi Zhang,Jiadong Zang,Chao Yang,Qingping Wang,Ming-Yu Li,Shenglin Jiang
In practical application, new dielectric capacitors with greater energy density at lower operating voltage will be promising candidates for high-performance electrical devices. Theoretically, it is possible to achieve large electric polarization at a low electric field via embedding aligned ferroelectric nanowires in a polymer matrix, which could release high energy density. However, in terms of practice, the design of nanocomposites with aligned nanowires poses a great technical challenge. Here, a new physical-assisted casting method was developed to tune the orientation of elongated BaTiO3 nanowires in a P(VDF-CTFE) matrix. In the Z-aligned nanocomposites, a large (Dmax − Pr) value of 9.93 μC cm−2 can be induced at a low electric field of 2400 kV cm−1 by aligning 3 vol% ferroelectric BaTiO3 nanowires in the poling direction. Compared with X–Y-aligned nanocomposites even at a high electric field of 3400 kV cm−1, the Z-aligned nanocomposites could exhibit simultaneously an enhanced energy density of 10.8 J cm−3 and a discharge efficiency of 61.4% at 2400 kV cm−1. To the best of our knowledge, among ferroelectric nanocomposites, this is the highest energy density ever obtained at such a low electric field. This work is of critical significance in making dielectric nanocomposites viable for energy storage devices in current electrical and electronic applications.
研究领域:
材料科学
·
电气工程
·
纳米技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Yin Li-Juan,Du Boyuan,Hu Hui-Yi,Dong Wen-Zhuo,Zhao Yu,Zhang Zili,Zhao Huichan,Zhong Shao-Long,Yi Chenyi,Qu Liangti,Dang Zhi-Min
Dielectric elastomers, used as driver modules, require high power density to enable fast movement and efficient work of soft robots. Polyacrylate elastomers usually suffer from low power density under low electric fields due to limited response frequency. Here, we propose a bimodal network polyacrylate dielectric elastomer which breaks the intrinsic coupling relationship between dielectric and mechanical properties, featuring relatively high dielectric constant, low Young’s modulus, and wide driving frequency bandwidth (~200 Hz) like silicones. Therefore, an ultrahigh power density (154 W kg −1 @20 MV m −1 , 200 Hz) is realized at low electric field and high resonance frequency, 75 times greater than at 10 Hz. Further, a rotary motor is developed, reaching an impressive speed of 1245 rpm at 19.6 MV m −1 and 125 Hz, surpassing previous acrylate-based motors and entering the high-speed domain of silicone-based motors. These findings offer a versatile strategy to fabricate high-power-density dielectric elastomers for low-electric-field soft actuators.
研究领域:
材料科学
·
机器人技术
·
机电系统
·
聚合物科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
San-Ni Zhao,Zi-Li Zhang,Li-Juan Yin,Yan Wang,Yi-Le Zhu,Zhi-Min Dang,Yu Zhao
Dielectric elastomers (DEs) have been extensively studied for their excellent electromechanical conversion properties, which make them ideal for flexible and non-magnetic drives. However, the common DEs usually require a high actuating electric field to achieve outstanding performance, severely limiting their application. In this study, advanced DE composites with good mechanical and dielectric properties was designed and synthesized (named as CPBA/PVDF). Adding DMF to the precursor solution and removing it after polymerization can lower the crosslinking density and increase linear polymer plasticizers in the matrix. As a result, the Young's modulus reduces and elongation at break arises without deteriorating the hysteretic and relaxation properties. Moreover, the incorporation of polar PVDF notably increases the tensile strength and dielectric constant of the composite films. Based on these, the CPBA/PVDF-3 gets a relatively high dielectric constant (5.74@1 kHz) and low modulus (0.144 Mpa), remarkably improves its actuation sensitivity (39.86), which is three times higher than that of the CPBA matrix (11.44). Therefore, CPBA/PVDF-3 achieved a high actuating strain of 25.1 % under 17.17 kV/mm with non pre-strain, and 160 % at 36.3 kV/mm under 200 % biaxial pre-tension. Importantly, it demonstrated a specific power density of 235 W/kg at just 16 kV/mm (@ 6 Hz). In addition, a simple linear actuator based on the CPBA/PVDF film can produce a free displacement of 0.755 mm (7.55 % of the actuator's effective length) and an output force of 306.95 mN/g at 15.7 kV/mm.
研究领域:
材料科学
·
聚合物复合材料
·
机电系统
·
柔性机器人
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Gang Chen,Xue Bai,Cong Ji,Zhijun Zhou,Zixuan Zhang,Chao Chen,Zhengtang Su,Wei Cai,Rongli Gao,Chunlin Fu
Bi 0.5 Na 0.5 TiO 3 ceramic is a promising dielectric energy storage material due to its high spontaneous polarization (> 40 μC/cm 2 ) . Although many studies have been carried out to enhance the energy storage performance of Bi 0.5 Na 0.5 TiO 3 ceramic, achieving better energy storage performance is still a considerable challenge. Herein, Bi 0.5 Na 0.5 TiO 3 -BiYbO 3 -SrTiO 3 (BNT-BY-STO) relaxor ferroelectric ceramics were constructed, and <111>-oriented (1- x )(0.99BNT-0.01BY)- x STO ceramics were successfully fabricated by a templated grain growth method. The moderate energy storage performance (the reversible energy storage density of 3.26 J/cm 3 and energy storage efficiency of 76.3% under 290 kV/cm) can be achieved in <111>-oriented 0.8(0.99BNT-0.01BY)-0.2STO ceramics. The enhanced energy storage performance of textured BNT-BY-STO ceramics could be mainly attributed to the grain refinement of STO, and the improved breakdown strength and relaxation behavior caused by orientation engineering. These findings demonstrate that the co-doping of BY and STO and orientation engineering are effective strategies for improving the energy storage performance of BNT ceramic.
研究领域:
材料科学
·
电陶瓷
·
储能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）