JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 35
·期 1
·1-13
·
IF 2.8
Ding Yiwen,Ren KeJu,Zeng Zhixin,Meng Gang,Gao Rongli,Deng Xiaoling,Chen Gang,Cai Wei,Fu Chunlin,Wang Zhenhua,Lei Xiang
The potential applications of magnetoelectric composites in capacitors, sensors, memory electronic devices, and energy harvesting devices have aroused great interest due to their mutual coupling between ferroelectric and ferromagnetic phases. In this paper, BFO/CFO composite films were prepared by the sol–gel method, and the regulation of magneto-photoelectric and coupling properties of BFO/CFO films with different compositions was studied. The results show that with the increase of BFO composition, the interface between BFO layer and BFO layer also appears, the dielectric constant of the film decreases with increasing the content of BFO, and the photoelectric conversion efficiency of the film increases at first and then decreases with the increase of BFO content. When the composition is 4BFO/6CFO, the photoelectric conversion efficiency of the composite film is the highest, which is 2.02 × 10 −3 %. With the increase of CFO content, the remanent magnetization and saturation magnetization of the film increase gradually. However, when the compositions are 4BFO/6CFO and 3BFO/7CFO, their leakage current is high, resulting in the degradation of ferroelectric properties. The composition 5BFO/5CFO has the highest magnetodielectric and photo induced magnetodielectric response, the corresponding values are 2.21% and 3.88%, respectively. The magnetoelectric coupling coefficient of the film is greatly increased under the action of light, reaching 115%, which could plausibly relate to the photovoltaic effect and the photostriction effects of the film. These results may provide good guidance on designing new photoelectromagnetic detector.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Hao Yang,Jiangang Zhou,Huasong Xu,Bin Gou,Rui Wang,Congzhen Xie
Polymer dielectrics are promising dielectric materials for high-energy-density dielectric capacitors owing to their facile processability and high breakdown strength . Currently, the primary method used to prepare nanocomposites involves the combination of polymers and nanoparticles and utilises the high insulation abilities of nanoparticles to limit the migration of carriers to obtain a high breakdown strength and charge–discharge efficiency. However, the dispersion of nanofillers in nanocomposites prepared using traditional methods is unsatisfactory, which not only leads to unsatisfactory energy-storage performance but also limits their applications owing to inconsistent batch-to-batch performance. Herein, nanocomposites with high energy densities are prepared through the in situ synthesis of nanoparticles in polymer solutions . Owing to the uniform dispersion and excellent insulation performance of the nanoparticles, the nanocomposites demonstrated a discharge energy density of 26.5 J/cm 3 with a charge–discharge efficiency of 68% at the optimal composition. Additionally, amorphous nanoparticles have a higher energy barrier than crystalline nanoparticles, which can inhibit the carrier transport more effectively to obtain a lower leakage current. Compared with traditional preparation approaches, the as-proposed method for preparing nanocomposites is simple, and the resulting materials exhibit high performance, which is critical for the application of nanocomposites in capacitors.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Yu Feng,Yu Zhang,Jie Sheng,Tiandong Zhang,Qingguo Chi,Qingguo Chen,Weidong Fei
Multiferroic materials have good application prospect in the field of non-volatile random access memory due to the simultaneous existence of ferroelectricity, ferromagnetism, and the coupling between them. In this work, two kinds of nanofibers (pure CoFe2O4 nanofibers and CoFe2O4 nanofibers coated with a BaTiO3 layer) were designed and fabricated. P(VDF-TrFE)-based composites with aligned nanofibers were prepared via high-speed directional electrospinning. The effect of ferromagnetic nanofibers on the ferroelectricity of composites was investigated, and the multiferroic performance and magnetic anisotropy were observed. The leakage current of the composite can be well suppressed after coating the BaTiO3 layer, and it makes the composite possess enhanced ferroelectric and ferromagnetic properties at the same time. Notably, the maximum polarization and remnant polarization of a 10 vol % P(VDF-TrFE)/CoFe2O4@BaTiO3 composite reach 8.0 and 7.0 μC/cm2, respectively, when the applied electric field is 1000 kV/cm. Meanwhile, the maximum magnetization and remnant magnetization are 5.9 and 2.0 emu/g at 20,000 Oe, respectively, and the magnetization along the nanofiber direction is larger than that perpendicular to the nanofiber direction on the surface of the composites. The maximum values of the magnetoelectric voltage coefficient reached 5111 mV/cm·Oe (Hdc = 8083 Oe) for the 5 vol % P(VDF-TrFE)/CoFe2O4@BaTiO3 composite. The excellent ferroelectric and ferromagnetic properties in a high electric field make flexible composites promising to be an ideal material for improving the multiferroic devices.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yuqi Liu,Chengyuan Wang,Jiufeng Dong,Yujuan Niu,Zizhao Pan,Liang Sun,Yani Lu,Xuyang Wang,Li Li,Jiangyu Li,Jiannong Wang,Hong Wang
Nanofillers and polymer matrices are utilized to construct nanocomposites, offering a promising approach to enhance energy storage performance in harsh conditions. This strategy relies on structural design to introduce deep charge traps that regulate carrier transport within the material. However, comprehensive studies combining theoretical and experimental methods to elucidate how trap introduction by nanofillers improves capacitive performance remain limited. Here, we in-situ synthesized alumina (AO) nanosheets via a hydrothermal method and fabricated uniformly dispersed nanocomposites with polyimide (PI) as the matrix. Energy band theory revealed that AO nanosheets introduced deep charge traps at the PI-AO interface, substantially reducing leakage current density. High-resolution Kelvin probe force microscopy (KPFM) experimentally confirmed the presence of interfacial deep charge traps at the nanofiller/polymer interface. Thermally stimulated discharge current (TSDC) was further measured to characterize variations in trap depth and density among different materials. At 150 °C, the optimized nanocomposite achieved a high energy storage density of 2.72 J cm −3 with a charge–discharge efficiency exceeding 90 %, corresponding to approximately 448 % of the performance of pristine PI. This work bridges critical gaps between experimental observations and theoretical mechanisms, clarifying the role of interfacial charge traps in nanocomposite performance.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Pei Huang,Lei Li,Dar-Jen Hsieh,Kuan-Chang Chang
The advanced field of bioelectronics bridges the electronic world and biological systems, opening a new area for More than Moore and stirring a wave of exploration in biomaterials. However, previously reported biomaterials usually suffer from poor purity and inferior electro-optic performance, discouraging their further development in bioelectronics. Here, porcine collagen extracted from pigskin through supercritical carbon dioxide is utilized as a dielectric layer in capacitors. A protein-amicable and low-temperature supercritical fluid (LT-SCF) strategy is also explored to enhance the electro-optic figure of merits. With the assistance of supercritical CO2 fluids, free amino acids that might have a detrimental effect on the electro-optic performance of the devices have been eliminated. After LT-SCF, the electrical characteristics involving current–voltage and capacitance–voltage become more stable. The leakage currents of capacitors treated with LT-SCF drop by 15 times. The capacitance and conductance also have declining tendencies, contributing to reduced power consumption. Regarding optical characteristics, transparency and refractive index are also substantially enhanced. And numerous material analyses further verify the role of supercritical CO2 fluids. More notably, the biodegradability of collagen films can be achieved with fast water dissolution. Overall, this low-temperature and protein-amicable supercritical fluid technology brings endless possibilities to explore collagen-based bioelectronics.
研究领域:
生物材料学
·
电子工程学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Qihuang Deng,Jiangqiong Wang,Peiyao Chen,Maolin Bo,Ya’na Lu,Yuanfeng Pan,Hong Liu,Wanshan Duan,Jimin Xie,Yefeng Feng
Scattering medium-bandgap semiconductors into polymers cannot remarkably improve the dielectric constant in composites. Nanoscale ceramic leads to a high interface leakage current. To obtain a high dielectric constant and low loss, in this work, graphitic carbon nitride (g-C 3 N 4 )@PbS microparticles were prepared for fabricating polymer-based ternary composites. Polymer/PbS binary composites were also fabricated. In terms of electric properties, ternary composites show more advantages than binary composites. In ternary composites, the improved dielectric constant is ascribed to S N bonding at the g-C 3 N 4 /PbS interface. Decreased dielectric loss is rooted in the reduced interface leakage current (from the large size of the hybrid filler) between the polymer and PbS. Under high fields, the reduced breakdown strength is attributed to the reduced bandgap in the hybrid filler compared with PbS and g-C 3 N 4 . The innovation of this work is the high-efficiency collaboration between microsized and interfacial S N bonding in g-C 3 N 4 @PbS filler. The ternary composite with 15 wt% hybrid filler has a high dielectric constant of ~ 39 and a low dielectric loss of ~ 0.04 at 100 Hz (low field) as well as a high breakdown strength of ~ 202 MV m −1 under a direct-current field. This work might enlighten the fabrication of polymer composites with great promise in energy storage.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 6
·1-7
·
IF 2.8
Jiajie Zhu,Gang Cao,Hao Wang,Hao Yan,Wenzhen Wang,Run Xu
In semiconductor radiation detectors, leakage current is a major noise source affecting energy resolution and sensitivity. The surface passivation technology can reduce this leakage current and hence significantly enhance detector performance. Here, we demonstrate a facile way to passivate the surface of the nuclear detectors based on Methylammonium Lead Iodide (MAPbI \(_3\) ) single crystals using soaking treatment in ethanol. A dense passivation layer of PbI \(_2\) was formed on the crystal surface, significantly reducing the surface leakage current by an order of magnitude under the same voltage. The energy resolution of the MAPbI \(_3\) -based detector is therefore improved by nearly 10% for the detection of 59.5 KeV irradiated from \(^{241}\) Am. Therefore, the PbI \(_2\) passivation by ethanol-soaking treatment is proved to be an effective method to reduce leakage current and improve detection performance.
研究领域:
半导体探测器
·
材料科学
·
核仪器
·
表面钝化
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hongmei Qin,Man Liu,Shiyu Qin,Shixian Zhang,Xingnan Zhou,Chenjian Li,Yuhao Wei,Dan Chen,Rong Fan,Shan Wang,Quanling Yang,Chuanxi Xiong,Qing Wang
Developing dielectric polymers with different stereoisomers may provide a novel strategy to improve electrostatic energy storage performance under harsh environments. However, there is still little research about the effect of polymer stereoisomerism on capacitive energy storage so far. Here, we report a new class of cycloaliphatic polynorbornene-imide (PNC) dielectric with two different spatial configurations and demonstrate that flexural configuration significantly improves the energy storage performance at room temperature and high temperature. ENDO-PNC with flexural configuration possesses slightly higher dielectric constant, comparably large bandgap and dramatically improved thermal properties with respect to EXO-PNC with near-planar configuration. Notedly, ENDO-PNC exhibits dramatically inhibited leakage current density and hopping distance, substantially improved activation energy, electrical resistivity and breakdown strength. Consequently, ENDO-PNC exhibits an ultrahigh discharged energy density ( U d ) of 11.10 J/cm 3 , 9.11 J/cm 3 and 6.77 J/cm 3 at 25 °C, 150 °C and 200 °C respectively, as high as 1.4 times, 2.0 times and 2.8 times that of EXO-PNC. Moreover, ENDO-PNC delivers a maximum U d of 6.0 J/cm 3 and 3.3 J/cm 3 above 90 % efficiency respectively at 150 °C and 200 °C, superior to neat polymers and highly competitive in reported polymer composites. The stereoisomerism effect on dielectric energy storage is further demonstrated in other dielectric polymers, revealing this strategy is universally applicable and particularly meaningful to design and exploit polymer dielectrics working under harsh environments.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 10
·期 6
·2966-2972
·
IF 12.732
Mingwei Shi,Wei Yang,Zailei Zhang,Man Zhao,Zhong Lin Wang,Xianmao Lu
Solid-state supercapacitors (SSSCs) using hydrogel electrolytes have attracted great interest in recent years due to their potential for powering flexible and wearable electronics. But the application of SSSCs has been severely restricted by self-discharge, which is an inevitable issue that causes fast decay of cell voltage and loss of stored energy. In this work, we demonstrate that suppressed self-discharge of SSSCs can be achieved by using polyacrylamide (PAAm) hydrogels containing highly concentrated LiCl as electrolytes. Specifically, for cells with 14 M LiCl-PAAm hydrogel electrolytes charged to 0.8 V, a low OCV decay rate of 6.7 × 10−5 V mF−1 h−1 and a small leakage current of 0.003 μA mF−1 V−1 are obtained. Notably, the leakage current is much smaller than that of currently reported supercapacitors using hydrogel electrolytes. In addition, when SSSCs are employed for storing energy harvested by using a triboelectric nanogenerator (TENG) that has a characteristic of pulsed output current at the μA scale, a much enhanced charging efficiency is attained.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Tianran Zhang,Quanjiang Lv,Siyu Zhang,Mengfan Song,Siyuan Li,Lixue Zhang,Jiping Wang
In polymer dielectric energy storage, even polymers with high glass transition temperatures suffer significant degradation in energy storage performance as temperature increases, primarily due to a sharp rise in electrical conduction loss. In this study, we employ atomic layer deposition to coat the surface of a PEI/PVDF blend film with an Al 2 O 3 inorganic layer to enhance its energy storage performance at high temperatures. The influence of the inorganic layer's thickness on high-temperature energy storage performance is thoroughly analyzed. Experimental results and finite element simulations demonstrate that an ultra-thin Al 2 O 3 inorganic layer with the thickness of 50 nm effectively reduces leakage current density and mitigates space charge accumulation within the PEI/PVDF blends, thereby improving the high-temperature energy storage performance of the blends. Notably, under an applied electric field of 500 MV/m at 150 °C, the PEI/PVDF blend film with 50 nm Al 2 O 3 layer achieved a discharge energy density of 5.45 J/cm 3 and a charge-discharge efficiency of 97.75 %.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Yuan Liu,Hang Luo,Hao Xiong,Xuefan Zhou,Xun Jiang,Xiaona Li,Bo Peng,Yuting Wan,Xi Yuan,Dou Zhang
The low discharge energy density and operation temperature of dielectrics limit the integration application of capacitors under extreme environment conditions. In order to reduce the dielectric loss of Bi0.5Na0.5TiO3, 0.55Bi0.5Na0.5TiO3-0.45(Bi0.2Sr0.7)TiO3 (BNT-BST) nanofibers with optimized diameter were synthesized and utilized to improve the high-temperature capacitive energy storage of polyetherimide (PEI) nanocomposites. Benefiting from the introduction of nanofibers, the leakage current is significantly reduced and charge migration is limited, contributing to the enhancement of the energy storage properties. For example, the leakage current density of the 3 wt % BNT-BST/PEI nanocomposite is suppressed from 0.136 μA/cm2 of PEI to 0.056 μA/cm2 at 250 kV/mm. The nanocomposite with 3 wt % BNT-BST achieves an excellent discharge energy density of 10.37 J/cm3 at 560 kV/mm, which is 65.4% higher than that of PEI. When the environment temperature is up to 100 °C, the discharge energy density of the nanocomposite maintains a high level of 4.76 J/cm3. Furthermore, the nanocomposite displays outstanding cycling stability and fast charge–discharge performance. For instance, after 106 charge–discharge cycles at 150 kV/mm, the discharge energy density and efficiency remain at 99 and 95% of the initial values, respectively. This work provides a feasible idea for achieving high-energy density nanocomposites under high environment temperature.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Wenlong Liu,Jianbo Wang,Jiahua Wei,Di Li,Jin Zong,Qibin Yuan
In the field of multifunctional electronic components, multiferroic material which possesses both ferroelectricity and ferromagnetism has important application prospect. Here, the Bi 0.89 Tb 0.11 Fe 0.96 Mn 0.02 Co 0.02 O 3 /Zn 1-x Ni x Fe 2 O 4 (BTFMCO/ZN x FO) bilayer thin films ( x = 0.0, 0.1, 0.2, 0.3, 0.4) are fabricated by the sol-gel spin-coating technique. The influence of ZN x FO magnetic layer on the structural, dielectric, ferroelectric, and ferromagnetic properties of the bilayer thin films is systematically investigated. The BTFMCO/ZN 0.2 FO bilayer exhibits the lowest surface roughness (Ra=1.44 nm), a markedly reduced Fe 2+ concentration and minimized oxygen vacancy density, leading to a suppressed leakage current density of 3.7 × 10 –4 A/cm 2 at 200 kV/cm. Consequently, enhanced multiferroic properties with a ferroelectric remnant polarization (2P r ) of 118.5 µC/cm² and saturation magnetization (M s ) of 63.2 emu/cm³, respectively, are observed in the BTFMCO/ZN 0.2 FO sample. These findings reveal that interfacial modulation via Ni 2+ -doped ZN x FO layers is an effective strategy to simultaneously enhance ferroelectric and ferromagnetic performance.
研究领域:
材料科学
·
凝聚态物理
·
功能薄膜
·
多铁材料
·
磁电耦合
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）