SOLAR ENERGY
·
2022
·
IF 7.188
J. Yan,B.W. Yang,C.Y. Zhao
Thermochemical energy storage (TCES) is a promising energy storage method because of its high energy storage density and long-term storage ability. The reactor is the most critical part of the TCES system, and the fluidized bed reactor (FBR) is a novel reactor, which is not restricted by the low effective thermal conductivity of energy storage materials. However, there is little theoretical guidance about the design and operation of the FBR for a TCES system. In this study, we investigated the performance of an FBR using MgO/Mg(OH) 2 as reaction materials by establishing a numerical model followed by experimental validation. The influence of operating parameters on the bed temperature was discussed based on numerical results. According to the sensitivity analysis, the reactor inner diameter, material mass, and inlet gas velocity were the main factors affecting the bed temperature. The optimal boundary surface temperature was analyzed, which influences the proportion of TCES in the total heat storage.
研究领域:
能源工程
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化学工程
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DOI
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Xianglei Liu,Changjian Yuan,Hangbin Zheng,Chao Song,Cheng Tian,Ke Gao,Nan Sun,Zhixing Jiang,Yimin Xuan,Yulong Ding
Calcium carbonate (CaCO 3 ) pellets are suitable for scalable solar thermochemical energy storage but suffer from low solar absorptance, poor stability, and slow reaction kinetics, which lead to low solar energy storage efficiency. Here, for the first time, we successfully achieve fast and efficient solar thermochemical energy storage via synergistically employing Al, Mn, and Fe stabilizers for improving both cyclic stability and solar absorptance, and Li 2 CO 3 promoters for accelerating decomposition of CaCO 3 pellets. The average solar absorptance is 1500% higher than that of pure CaCO 3 pellets. After 60 cycles, the energy storage density is still as high as 1671 kJ/kg with a decay rate of only 4.14%, in stark contrast to energy density of 1121 kJ/kg and decay rate of 56.73% for pure CaCO 3 pellets. The average decomposition rate is about twice as fast as that of pure CaCO 3 pellets due to enhanced Ca 2+ diffusion by doped Li 2 CO 3 . Under direct light irradiation, novel CaCO 3 pellets demonstrate high energy storage rate due to both high solar absorptance and fast decomposition rate, while pure CaCO 3 pellets cannot even reach the decomposition temperature. This work opens new opportunities for scalable deployment of direct solar-driven thermochemical energy storage techniques based on Li 2 CO 3 -doped dark CaCO 3 pellets.
研究领域:
材料科学
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能源工程
·
化学工程
✓ 已验证
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DOI
高影响因子
Journal of Materiomics
·
2023
·
IF 9.4
Ying Zhang,Meng-Han Yan,Zhi-Fei Zhang,Hai-Rui Bai,Peng Li,Wei-Fang Han,Ji-Gong Hao,Wei Li,Yu-Chao Li,Chun-Ming Wang,Peng Fu
The increase in energy consumption and its collateral damage on the environment has encouraged the development of environment-friendly ceramic materials with good energy storage properties. In this work, (1– x )Na 0.5 Bi 0.5 TiO 3 - x Ca(Mg 1/3 Nb 2/3 )O 3 ceramics were synthesized by the solid-state reaction method. The 0.88Na 0.5 Bi 0.5 TiO 3 -0.12Ca(Mg 1/3 Nb 2/3 )O 3 ceramic exhibited a high recoverable energy storage density of 8.1 J/cm 3 and energy storage efficiency of 82.4% at 550 kV/cm. The introduction of Ca(Mg 1/3 Nb 2/3 )O 3 reduced the grain size and increased the band gap, thereby enhancing the breakdown field strength of the ceramic materials. The method also resulted in good temperature stability (20–140 °C), frequency stability (1–200 Hz), and fatigue stability over 10 6 cycles. In addition, an ultrahigh power density of 187 MW/cm 3 and a fast charge-discharge rate ( t 0.9 = 57.2 ns) can be obtained simultaneously. Finite element method analysis revealed that the decrease of grain size was beneficial to the increase of breakdown field strength. Therefore, the 0.88Na 0.5 Bi 0.5 TiO 3 -0.12Ca(Mg 1/3 Nb 2/3 )O 3 ceramics resulted in high energy storage properties with good stability and were promising environment-friendly materials for advanced pulsed power systems applications.
研究领域:
材料科学
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能源工程
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 43
·15294-15302
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IF 6.4
Tianyu Liu,Bo Yan,Jinxu Ma,Qiang He,Linan An,Kepi Chen
The development of dielectric capacitors for applications under medium-low fields is of great significance to the integration and miniaturization of electronic circuits. Lead-free piezoelectric ceramics based on the morphotropic phase boundary (MPB) compositions have made great progress in the past two decades. In this study, we selected an MPB composition of 0.8525BNT–0.10995BKT–0.03755BT (BBNKT) as the matrix and Sr(Mg1/3Nb2/3)O3 (SMN) as the end member to form relaxor ferroelectric ceramics for energy storage applications. We showed that 0.85BBNKT–0.15SMN ceramics exhibited a recoverable energy storage density Wrec of 3.53 J cm−3 and an efficiency η of 86.3% at a medium-low electric field of 310 kV cm−1. The ceramics also exhibited good thermal stability (25 °C–180 °C), frequency stability (1 Hz–100 Hz), and fatigue resistance (>105 cycles). The current study provided a new idea for the compositional design of energy storage ceramics by modifying the piezoelectric ceramics with MPB compositions into high-entropy relaxor ferroelectrics.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Chaoyu Peng,Anze Shui,Hulei Yu,Xinrong Zhong
The development of ceramic capacitors with superior energy storage capabilities (>5 J/cm 3 ) under moderate electric fields (300–500 kV/cm) is essential for their practical integration into advanced electronic devices. Here, (1- x )(0.67BiFeO 3 -0.33BaTiO 3 )- x Na(Ta 0.5 Nb 0.5 )O 3 ( x = 0–0.25) ceramics are successfully synthesized, demonstrating exceptional energy storage performance. Specifically, the appropriate introduction of the Na(Ta 0.5 Nb 0.5 )O 3 can disrupt the long-range ordered structure in the ferroelectric samples and suppress the octahedral distortion, promoting the formation of polar nanoregions and reducing the remanent polarization. Meanwhile, a large bandgap and conductive activation energy endow it with a high breakdown strength. As a result, a high recoverable energy storage density of 6.44 J/cm 3 and a high energy storage efficiency of 87 % are achieved in the as-synthesized 0.8BFBT-0.2NTN samples under 440 kV/cm, with excellent frequency stability, temperature stability, and fatigue stability. This work presents a viable strategy for improving the energy storage properties of BiFeO 3 -based ceramics under moderate electric fields, offering significant potential for next-generation energy storage applications.
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DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Chai Qizhen,Liu Zhaobo,Deng Zhongqi,Peng Zhanhui,Chao Xiaolian,Lu Jiangbo,Huang Houbing,Zhang Shujun,Yang Zupei
Dielectric capacitors with ultrahigh power density have emerged as promising candidates for essential energy storage components in electronic and electrical systems. They enable enhanced integration, miniaturization, and lightweight design. However, the development of dielectric materials for cutting-edge energy storage applications has been significantly limited by their low recoverable energy storage density ( W rec ) and energy efficiency ( η ), especially at moderate electric fields. In this study, we fabricated 0.85K 0.5 Na 0.5 NbO 3 -0.15Sr 0.7 Nd 0.2 ZrO 3 ceramics with an outstanding energy storage performance ( W rec ~ 7 J cm − 3 , η ~ 92% at 500 kV cm − 1 ; W rec ~ 14 J cm − 3 , η ~ 89% at 760 kV cm − 1 ). The exceptional energy storage performance can be primarily attributed to the heterogeneous structure, where orthorhombic and tetragonal polar nanoregions are embedded in a cubic matrix. This work provides a good paradigm for designing dielectric materials with ultrahigh energy storage density and excellent energy efficiency at a moderate applied electric field, aligning with the stringent demands for advanced energy storage applications.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
PubMed
高影响因子
Small Methods
·
2021
·Vol. 5
·期 11
·2100787
·
IF 14.188
Rui Huang,Hongye Wang,Cheng Tao,Minghe Cao,Hua Hao,Zhonghua Yao,Hanxing Liu
Dielectric film capacitors are considered as potential candidates for advanced power electronics technology due to their extremely high-power densities and outstanding mechanical and thermal stability, but the further improvement of energy storage density is still needed. Here, a strategy is proposed to enhance the energy storage properties by introducing nanoscale polarization regions into amorphous films, which can significantly improve the maximum polarization and maintain a high breakdown strength. The (1− x )BaTiO 3 - x Bi(Ni 0.5 Zr 0.5 )O 3 ((1− x )BT- x BNZ) thin films are fabricated by the sol–gel method and the amorphous films with nanoscale polarization regions are obtained by adjusting the preparation process. Consistent with the conjecture, amorphous phase and nanoscale polarization regions in the (1− x )BT- x BNZ films are clearly observed by electron diffraction. Results show that giant recoverable energy density of 103.7 J cm −3 with high energy efficiency of 88.3% are simultaneously achieved at 8.3 MV cm −1 in 0.92BT-0.08BNZ thin films. Furthermore, the 0.92BT-0.08BNZ thin film exhibits excellent thermal stability in a wide temperature range of 20–200 °C, ∆ W rec / W rec20 °C < 2.2%. This work provides a novel method for dielectric thin film capacitors applied in high temperature and electric field.
研究领域:
材料科学
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电子工程
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产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2023
·Vol. 13
·期 11
·2203587
·
IF 27.8
Tongguang Zhu,Hang Zhao,Na Zhang,Chuying Zhang,Lei Yin,Zhi-Min Dang,Jinbo Bai
Dielectric capacitors are fundamental energy storage components in electronics and electric power systems due to their unique ultrahigh power density. However, their relatively low energy storage density is a long-standing challenge which greatly limits their practical application range. Chitosan (CS) and montmorillonite (MMT) are two kinds of materials that exist abundantly on the earth with natural surface charges. The positively charged CS and negatively charged MMT can be self-assembled into the typical sandwich-structured CS/MMT/CS 2D structure through an electrostatic attraction. Loading these surface-charged sandwich-structured nanosheets into poly(vinylidene fluoride)-based composite with a weight fraction as tiny as 0.3 wt.%, an ultrahigh energy storage density of 32.5 J cm −3 accompanied with a high efficiency of 64% are concurrently achieved with a very low cost and scalable process. Guided by finite element simulation, it is revealed that a number of electric potential wells that exist in the charged sandwich nanosheets impede the acceleration of internal charges and hinder the growth of electrical trees. The results offer a novel paradigm for exploring ultrahigh energy storage density capacitors in an economical way.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 31
·12724-12735
·
IF 4.5
Zhang Changhai,Wang Hairui,Zhang Tiandong,Zhang Yue,Zhang Yongquan,Tang Chao
Polymer dielectric materials are attracting wide focus in electronics, but their low energy density limits miniaturization and intelligent application. In recent years, the sandwich-structured has offered an ideal way to enhance the energy storage performance of polymer materials. In this work, the symmetrically sandwich composite dielectrics were prepared, containing an outer layer of poly (vinylidene fluoride-trifluoro ethylene chlorofluoride)@titanium dioxide (P (VDF-TrFE-CFE)@TiO 2 ) and an inner layer of poly (methyl methacrylate)@magnesium oxide (PMMA@MgO). The sandwich structure can combine the advantages of the excellent breakdown strength of PMMA and the superior polarization strength of P (VDF-TrFE-CFE). Moreover, TiO 2 with a high dielectric constant further improves the polarization strength, and the insulation performance enhances by MgO with a large band gap. The experimental results show that 0.5–1–0.5 sandwich composite dielectric has the most excellent breakdown strength of 633.8 kV/mm, and a discharge energy density of 17.16 J/cm 3 with an efficiency of 70.1%. This work offers experimental guidance for the development of outstanding energy storage performance of polymer dielectric capacitors.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2019
·
IF 6.282
Linlin Ren,Xiaoliang Zeng,Xian Zhang,Rong Sun,Xingyou Tian,Yuping Zeng,Jian-Bin Xu,Ching-Ping Wong
Dielectric polymer composites consisting of inorganic fillers and polymers have wide applications in high energy density electronic devices. However, development of dielectric polymer composites with enhanced energy storage density and thermal conductivity is desired but challenge. Herein, we report polymer composites consisting of epoxy resin and silver nanoparticle-decorated Al 2 O 3 microspheres (Al 2 O 3 -AgNPs), which show enhanced energy storage density and thermal conductivity (1.11 W/m K), at 70 wt% Al 2 O 3 -AgNPs. The discharged energy density of Al 2 O 3 -AgNPs/epoxy resin composites with 70 wt% hybrid fillers is 4.28 × 10 -3 J cm −3 , while the composites without AgNPs is 3.09 × 10 -3 J cm −3 at 200 kV cm −1 . The enhanced energy storage density and thermal conductivity are attributed to the enhanced the interfacial polarization and the bridge role of AgNp in facilitating the heat flow across the interfacial boundary, respectively. The results support the potential applications of the Al 2 O 3 -AgNPs/epoxy resin composites used as dielectric materials in modern electronics and electric power systems.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
SOLAR ENERGY
·
2023
·
IF 6.7
Xinrui Wang,Xianglei Liu,Hangbin Zheng,Chao Song,Ke Gao,Cheng Tian,Nan Sun,Zhixing Jiang
Ca-based thermochemical energy storage (TCES) system is one of the most promising energy storage techniques for the next generation concentrated solar power systems (CSP). However, it still suffers from low optical absorption, poor cycle stability, and limited energy storage density . Here, a hierarchically doping strategy is proposed to overcome above challenges and achieve high-performance energy storage under direct solar irradiation . Hierarchically doped calcium carbonate pellets, which are suitable for scalable applications, are successfully fabricated with Al-doped internal cores and Mn-rich external shells. The average solar absorptance achieves 87.15% with a 7.4% increase compared with traditionally homogeneous doping approaches. The energy storage density is still as high as 1143 kJ/kg after 20 cycles, which is enhanced by 16.6% over homogeneous counterparts. The underlying mechanism is that hierarchically doping increases contents of active CaCO 3 inside pellets and absorption-enhanced substances on the outer surface simultaneously. This work presents a novel approach for the design of high-performance pellets for achieving scalable and efficient thermochemical energy storage under direct solar irradiation.
研究领域:
能源科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Wenchao Zhang,Songpo Lv,Qingguo Chen,Jinghua Yin,Dong Yue,Yu Feng,Dongyu Hou
Polymer dielectrics, as a crucial role in electrostatic capacitors used in transport, oil exploration, the manufacturing industry, avionics domain, reach operating temperatures of 120 °C or more. However, the significant reduction in the capacity of energy storage at high temperatures greatly restricts polymer dielectrics used in such environments. By adjusting the distribution of functional layers, has designed all-organic multilayer composite dielectrics that can significantly inhibit carrier conduction at high temperatures, thereby enhancing the energy storage density. Among them, highly insulating polycarbonate (PC) is the outer layer, and highly heat-resistant fluorene polyester (FPE) forms the inner layer. The various distribution ratios that impacted the performance of these composite dielectrics have been thoroughly investigated. The research finds that the five-layer structured composite dielectric with PC and FPE layers composite dielectrics (PFPFP) have superior temperature stability and energy storage capabilities. In particular, they are able to withstand up to 350 kV/mm electric field strength ( E b ) at 150 °C, and the energy storage density of 2.15 J/cm 2 and the efficiency of 90.1 % is 3.98 times that of pure PC. It is suggested that the method of using the merits of different function layers to increase the dielectric energy density is suitable for different polymer films under severe conditions.
研究领域:
材料科学
·
能源工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）