JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Yue Zhang,Xin He,Xiuchun Cong,Qi Wang,Huajie Yi,Sen Li,Changhai Zhang,Tiandong Zhang,Xuan Wang,Qingguo Chi
Polyethersulfone (PESU) has distinctive features of great breakdown strength and low dielectric loss. However, some factors limit the practical application of PESU dielectric materials in the field of energy storage, for instance, the low energy storage density, polarization strength and dielectric constant of PESU. In this work, ZnO nano-shell and BFSTO nano-shell coated BZCT are successfully synthesized, respectively, using the hydrothermal method . Compared to the pure PESU and BZCT/PESU, discharged energy density and efficiency are obviously improved by adding the core-shell structural nanofibers (NFs) into the PESU matrix. Particularly, a remarkably suppressed dielectric loss in 2 wt% BZCT@BFSTO/PESU composites with an outstanding dielectric energy density and an excellent charging-discharging efficiency are simultaneously achieved. The results demonstrate that the discharge energy density of the 2 wt% BZCT@BFSTO/PESU can reach 10.5 J/cm 3 under the electric field of 500 kV/mm, and the charge-discharge efficiency is 84%. This in-depth research on PESU-based composite dielectrics has laid an experimental and theoretical basis for the improvement of the dielectric properties and energy storage performance of polymer-based composite, resulting in promoting the development of new dielectric capacitors, and paving the way for the applications of it in the field of energy storage.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 65
·52809-52816
·
IF 3.84
Hang Luo,Dou Zhang,Lu Wang,Chao Chen,Jing Zhou,Kechao Zhou
A sandwich-structured composite consisted of a pure poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) central layer and two BaTiO3–P(VDF-HFP) neighboring layers was developed for high energy storage density. The sandwiched structure effectively enhanced dielectric properties and energy storage capacity of the composites. Breakdown strength and energy storage density of the composite with 35 vol% P(VDF-HFP) central layer reached 315 kV mm−1 and 5.22 J cm−3, which were enhanced by 68% and 125% compared to 187 kV mm−1 and 2.32 J cm−3 of the single layer composite, respectively. The dielectric constant of the composites with sandwich-structure was approximately 3 times higher than the pure P(VDF-HFP) and the dielectric loss was as low as 0.026 at 1 kHz. These results demonstrated that the sandwich-structured ceramics/polymer composite was an effective way to produce high energy density composites.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Gang Chen,Cong Ji,Xue Bai,Jie Wang,Chao Chen,Zhijun Zhou,Zixuan Zhang,Zhengtan Su,Rongli Gao,Wei Cai,Xiaoling Deng,Zhenhua Wang,Chunlin Fu
(1- x ) (0.99 Na 0.5 Bi 0.5 TiO 3 -0.01BiYbO 3 )- x SrTiO 3 (abbreviated as (1- x ) (0.99NBT-0.01BY)- x STO) ( x = 0.1⁓0.4) relaxor ferroelectric ceramics were fabricated by a solid-state reaction method. The crystal structure, surface morphology as well as dielectric , ferroelectric and energy storage properties of (1- x ) (0.99NBT-0.01BY)- x STO were investigated in detail. X-ray diffraction patterns show that NBT-BY-STO ceramics have a single perovskite structure with a pseudo-cubic phase. The introduction of STO can effectively refine the NBT-based ceramic grain. The relaxation behavior of NBT-BY can be enhanced by incorporating moderate STO, and the impedance reduced with the increase of STO content. The results of hysteresis loop analysis indicate that incorporating STO into NBT-BY contributes to an increase in the electric breakdown field and a reduction in remnant polarization, thus enhancing its energy storage performance significantly. A moderate energy storage property with large W rec (∼2.5 J/cm 3 ) and high η (∼80.97%) was achieved at 260 kV/cm for x = 0.4. Meanwhile, 0.98(0.99NBT-0.01BY)− 0.2STO relaxor ferroelectric ceramic presented relatively good frequency and temperature stabilities of W rec and η . This work provides an effective strategy for enhancing the energy storage performance of NBT-based relaxor ferroelectric ceramics applied in pulsed power devices.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Qianqian Yu,Haijun Wang,Yisha Ma
With the rapid development of renewable energy systems and flexible electronics, polymer-based dielectric films integrating high energy density, superior charge-discharge efficiency, and multifunctionality have emerged as a critical frontier in materials science. In this study, we developed an interface-engineered PVDF/APTES@CsPbBr 3 organic-inorganic composite via an innovative in situ growth strategy of APTES-passivated perovskite quantum dots (QDs) within a PVDF matrix. The precisely controlled in situ synthesis enabled uniform QDs dispersion while establishing robust interfacial interactions. This synergistic design achieves dual enhancements by triggering pronounced polar-phase crystallization (>90 % β/γ-phase content) in PVDF to amplify dipole polarization and suppressing leakage pathways through QDs-induced nano-confinement effects. Remarkably, the composite exhibits a record-breaking energy storage density of 13.69 J/cm 3 at an electric field of 470 kV/mm with an ultrahigh efficiency of 85.03 %, surpassing most reported PVDF-based composites under comparable electric fields. Furthermore, the composite uniquely demonstrates temperature-stable ultraviolet fluorescence, a feature that not only confirms structural robustness but also enables real-time self-diagnosis of thermal degradation in optoelectronic devices. By integrating in situ -engineered interfaces, superior dielectric properties, and intrinsic optical sensing capabilities, this work establishes a transformative paradigm for intelligent energy materials in flexible electronics and self-monitoring power systems.
研究领域:
材料科学
·
能源技术
·
柔性电子学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2021
·
IF 17.789
Jie Jiang,Xiangjun Meng,Ling Li,Shun Guo,Ming Huang,Ji Zhang,Jing Wang,Xihong Hao,Heguo Zhu,Shan-Tao Zhang
Dielectric capacitors have drawn growing attention for their wide application in future high power and/or pulsed power electronic systems. However, the recoverable energy storage density ( W rec ) for dielectric ceramics is relatively low up to now, which largely restricts their actual application. Herein, the domain engineering is employed to construct relaxor antiferroelectric NaNbO 3 -BiFeO 3 bulk ceramics, which integrates the merits of antiferroelectrics and relaxors. It is revealed that the antiferroelectric phase transforms from orthorhombic P to R phase, and antiferroelectric domain evolves from micron-sized blocks to nanoscale clusters. Of particular importance is that the 0.90NaNbO 3 –0.10BiFeO 3 ceramic demonstrates ultrahigh W rec of 18.5 J cm −3 with giant electric breakdown strength of 99.5 kV mm −1 , which is superior than state-of-the-art bulk dielectric ceramics. Moreover, the 0.90NaNbO 3 –0.10BiFeO 3 ceramic exhibits superior frequency, cycling and thermal reliability, as well as the substantial current density (2140.6 A cm −2 ), ultrahigh power density (428.1 MW cm −3 ) and ultrafast discharge rate (14 ns). These results not only suggest that the NaNbO 3 -based relaxor antiferroelectric ceramics are promising candidates for advanced energy storage capacitors, but also provide feasible strategy of domain engineering to develop novel lead-free high-performance dielectric materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Sitong Li,Zhuqing Li,Yu Chen,Hua Tian,Gequn Shu
Thermochemical energy storage (TCES) based on salt hydrate stands out as an important method for long-term energy storage. However, the low energy storage density (ESD) at low temperature and poor cycle stability of the materials limit the practical application. In this work, new composites for thermochemical heat storage at low temperature (about 100 °C) are synthesized, consisting of SrBr 2 and SrCl 2 with various mass ratios and expanded graphite (EG). The material properties are characterized and measured using scanning electron microscope (SEM), X-ray diffraction (XRD), thermal constant analyzer and simultaneous thermal analyzer (STA). The results demonstrate that the composites display excellent thermal conductivity, ESD and cycling performance. The composites exhibit an improvement in thermal conductivity by almost eightfold when compared with pure SrBr 2 . In comparison with SrCl 2 , the composites demonstrate a reduction in hydration time by approximately 3/5. The ESD of the composites at 100 °C surpasses 800 kJ kg −1 , and the ESD of SrBr5Cl5@EG reaches 918.66 kJ kg −1 , representing an 18.23 % enhancement compared with pure SrBr 2 . Furthermore, it is revealed that reducing the adsorption temperature, raising the heat source temperature and evaporation temperature are conducive to enhancing the heat storage performance of the composite. The cycling test results indicate that the SrBr5Cl5@EG composite retains 94.44 % of the initial ESD after 14 cycles, affirming its good stability. This work provides a new avenue for the development of advanced thermal energy storage materials and demonstrates great potential for long-term thermochemical energy storage applications at low temperature.
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qibin Zhu,Long Chen,Yun Da
The Calcium looping thermochemical reaction directly driven by solar energy effectively addresses the problem of efficient energy storage of concentrated solar power plants (CSP) by shortening the energy conversion path. But new requirements are put forward for energy storage materials, including high solar radiation absorption, high cycling stability and fast kinetics. To meet these challenges, we have designed porous microsphere structures for the purpose of enhancing mass transfer and the capture of solar radiation. Additionally, Zr and Mn oxides with elevated Tammann temperatures were incorporated to stabilize the morphology and prevent sintering. The synthesized porous microspheres retained abundant mesoporous channels on the surface even after undergoing 20 cycles. The addition of Mn oxide significantly enhances solar spectral absorptivity, achieving an impressive 82.88 % absorbance. The incorporation of Mn and Zr oxides increased the sintering resistance, specific surface area and porosity of CaO/CaCO 3 , especially in the 10–100 nm range, which accelerated the CO 2 transport during carbonation. These enhancements significantly improve the chemical control stage of the carbonation reaction, as further supported by kinetic models. After 50 cycle experiments at 800 °C, the energy storage density of the sample remains at 1074 kJ/kg, which is 1.86 times that of the undoped CaCO 3 . This study provides a new way to design CaCO 3 materials suitable for CSP applications.
研究领域:
材料科学
·
可再生能源
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Xiao-Juan He,Ling Li,Zhong-Shuai Xie,Yi-Chi Zhang,Ji Zhang,Zheng-Bin Gu,Haibo Zhang,Guoliang Yuan,Shan-Tao Zhang
Solid solution ceramics of (1- x )Sr 0.75 Ba 0.25 Nb 2 O 6 - x PbZr 0.52 Ti 0.48 O 3 ( x = 0−0.4) were prepared and investigated. The phase evolves from tungsten bronze for x = 0, coexisted tungsten bronze and pyrochlore at x = 0.3, to pyrochlore for x > 0.3. As the results, the ceramics show dramatically composition dependent microstructure and electrical property. The grain shape changes from anisotropic pillar-like with maximum length-diameter ratio of 3.3 at x = 0.2 to isotropic cubic-like for x > 0.2. At the same time, the maximum dielectric constant temperature tends to decrease with an exceptional increase at x = 0.3 due to the coexisted phases. Interestingly, the x = 0.3 ceramic endures ultrahigh breakdown strength of 340 kV/cm, which, together with enhanced polarization, results in maximum recoverable energy storage density of 3.0 J/cm 3 and energy storage efficiency of 81.5 % at room temperature.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Peng Wang,Boyuan Zheng,Lei Han,Jun Xie,Wei Duan,Ying Yue,Yuning Zhang
Portable energy storage is developing rapidly with the miniaturization and integration of devices, and flexible supercapacitors are one of the important development directions. Nevertheless, the performance of most supercapacitors will be dramatically degraded after being eroded by water droplets or repeatedly stretched. In this research, the superhydrophobic electrode is constructed by a chemical modification. After the water droplets impale the electrode surface, they will eject, which prompts the surface dust to roll down and demonstrate a self-cleaning property. Meanwhile, an electrochemistry functionalization strategy was applied onto the hydrogel, which not only enhanced the mechanical properties but also effectively improved the energy storage density. The integrated superhydrophobic supercapacitor has a specific capacitance of 97.2 F/g at a current density of 0.8 mA/cm2, and a capacitor retention rate of 95.5% after 3500 cycles. Furthermore, it can withstand bending 2000 times and 24 h of immersion with either strong acid or alkali and can achieve long-term underwater work (3500 h). This versatile supercapacitor has potential applications in integrated flexible electronic systems by powering functional devices in harsh environments.
研究领域:
材料科学
·
能源技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Zepei Yu,Daili Feng,Yanhui Feng,Xinxin Zhang
A systematic, carbon-based composite phase change materials with substantial increase of the thermal conductivity and energy storage density was assembled by encapsulating PEG into graphene foams (GF), CNTs and hierarchical porous materials derived from GF and CNT. The influence of preparation approaches on the microstructures, thermal conductivity and thermal energy densities of composites were assessed by various characterization tools. The results obtained indicated that graphene foam-CNT hybrid structures (GCNT) composites exhibit excellent thermal conductivity, 118% higher than pure PEG and 89.5% higher relative to that of GF/PEG@CNT (GPC) composites. The content and interconnected hierarchical porous carbons enhance thermal transfer in composites during the process of phase change. Notably, GCNT@PEG (GCP) had a maximum of up to 80 wt% PCM loading. This composite has a melting latent heat of 128.7 kJ/kg, up to 39.3% and 87.5% higher than those of other composites. CNTs have significantly enhanced the thermal transport of composite PCMs, but the interfacial thermal resistance of CNTs and graphene foam is the bottleneck of heat transfer of composite PCMs. The current results create the conditions for the application of novel hierarchical porous carbon composite PCMs for high-energy density, thermal energy conversion, and shape-stabilized PCMs (ssPCMs) with improved thermal conductivity.
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
ENERGY CONVERSION AND MANAGEMENT
·
2022
·
IF 11.533
Abel Mehari,R.Z. Wang,Z.Y. Xu
Sorption thermal energy storage is one of the promising solar thermal energy storage considering its long-term storage ability. Since the common sorption thermal storage suffers from low sorption capacity, a high energy storage density enhancement mechanism is always essential for a cost-effective and compact storage system. With three-phase sorption thermal storage, high energy storage density from the crystallization sorption process can be achieved. However, such a sorption process brings significant challenges, including crystal blockage issues in absorption system or solution leakage handling problems in adsorption system, which need to be resolved. Here, we showed a high-performance sorption thermal storage that can attain high energy storage density via a full liquid-to-solid state sorption process. Such a process is achieved by adopting moist air as heat and mass transfer media, which enables liquid absorption, crystallization, and solid adsorption in a simple configuration simultaneously. The lab-scale model achieved high energy storage density in the range of 333–405 kWh/m 3 resulting from the heat of absorption and crystallization of LiCl, which is the record value for liquid absorption systems. The energy storage density obtained from the dual liquid and solid sorption processes is enhanced by 278 % compared with that of the conventional cycle at 70 % RH (relative humidity) and temperature lift of 10 °C. With simple construction and high energy storage density, the proposed system has great potential in real applications.
研究领域:
能源技术
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Liang Chen,Feng Li,Botao Gao,Chang Zhou,Jie Wu,Shiqing Deng,Hui Liu,He Qi,Jun Chen
BaTiO 3 -based lead-free ceramics are mainstays of electrical functional materials in industry with mature technology and relatively low cost. However, the huge challenge of low recoverable energy storage density ( W rec ) has long restricted their development in solid-state energy storage capacitors. Here, an ultrahigh W rec of ∼9.04 J cm −3 and a large efficiency ( η ) of ∼87.2% are realized in BaTiO 3 -based relaxor ceramics via designing heterostructure formed by coexisting rhombohedral-tetragonal multiphase ergodic polar nanoregions. Encouragingly, outstanding mechanical properties (Vickers hardness ∼9.7 Gpa, compressive strength ∼500 MPa) are also achieved and the structural correlation between the energy storage and mechanical properties has been established, which are linked to the synergistic mechanisms of solid solution strengthening, denseness strengthening, grain boundary strengthening, and twin boundary strengthening. It is particular significance that this work provides an effective strategy to design new high-performance dielectric materials, accelerating the development of BaTiO 3 -based lead-free capacitors used in advanced energy-storage devices.
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
危险品化学品经营许可证（带存储）