CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Keyu Chen,Ruiqi He,Jiacheng Guo,Lu Ye,Xi Chen,Changning Ran,Xinrui Yan,Jianjun Zhang,Sude Ma
(1- x ) BaTiO 3 – x Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ( x = 0.00, 0.06, 0.12, 0.20,molar ratio) ceramics were prepared by solid sintering method. The effects of Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 (BMZT) doping on microstructure, dielectric, ferroelectric and energy storage properties of BaTiO 3 (BTO) were studied. With BMZT addition, the sintering temperature gradually decreases, the grain size reaches a minimum at x = 0.12 and the phase structure changes from tetragonal to cubic. And dielectric properties changed from temperature-dependent to temperature-insensitive. Additionally, higher cubic phase content induced slim polarization and electric field (P-E) loop and low remnant polarization (P r ). Therefore, 0.88 BaTiO 3 - 0.12 Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ceramics achieved recoverable energy storage density (W rec ) of 702.7 mJ/cm 3 and high energy efficiency of 87.3 % under electric field of 93 kV/cm. It exhibited optimum properties, including a minimum grain size (0.620 μm), superior dielectric properties (ε r = 1811.3, tanδ = 0.0552 at 1150 °C), a high maximum polarization strength (14.3 μC/cm 2 ), and the maximum dielectric breakdown strength (93 kV/cm), as identified in the present study. It simultaneously maintains high energy storage density and efficiency over a wide electric field range and large temperature range (room temperature - 90 °C). Thus (1- x ) BaTiO 3 – x Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ceramics are a promising material for energy storage applications.
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
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Qingguo Chi,Tao Ma,Yue Zhang,Qingguo Chen,Changhai Zhang,Yang Cui,Tiandong Zhang,Jiaqi Lin,Xuan Wang,Qingquan Lei
The high-performance energy-storage dielectric capacitors are increasingly necessary for the development of miniaturization, integration, and multifunctionality of electronic devices. Here, we describe a new strategy of a sandwich-structured polymer-based dielectric composite with inorganic fillers of semiconductor@perovskite hybrid fibers, and this novel dielectric composite possesses an excellent energy-storage performance at low electric field. It is of crucial importance to achieve hybrid nanofibers of 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 nanofibers (BZT–BCT NFs) deposited by CoFe2O4 nanoparticles (CFO; hereafter, CFO@BZT–BCT NFs in short). Herein, the BZT–BCT NF ceramic has the typical perovskite structure and large dielectric constant, which is used as the ceramic-support for CFO. Meanwhile, the semiconductor of CFO works as the electron donor to offer a great interfacial polarization for the improvement of overall dielectric constant of the composite. Remarkably, the trilayer structure is composed of outer poly(vinylidene fluoride) (PVDF) layer to improve the breakdown strength and middle CFO@BZT–BCT NFs–PVDF nanocomposite to enhance the dielectric properties. The BZT–BCT NFs were prepared by electrospinning, and then the CFO@BZT–BCT NFs were gained by hydrothermal method. Furthermore, the BZT–BCT NFs and the CFO@BZT–BCT NFs were modified by polydopamine (PDA). Finally, the sandwich-structured composites were gotten by a typical process of solution-casting and hot-pressing. The influences of fillers’ volume fraction and type on the performances of composites have been systematically investigated. The PVDF/CFO@BZT–BCT NFs–PVDF/PVDF composite (P/CFO@BZT–BCT NFs–P/P) exhibits an outstanding energy density performance under a low electric field. The trilayer structure composite with an optimized content of nanofibers possesses an excellent dielectric performance (dielectric constant ∼20.1 at 100 Hz) and great energy-storage performance (electric displacement ∼10.7 μC/cm2, discharged energy density ∼11.3 J/cm3, and efficiency ∼55.5% at a low electric field of 350 kV/mm). This work paves the way for potential applications in integrated electronic devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Haoran Xu,Sheng Chen,Shaonan Chen,Rui Qiao,Hui Li,Hang Luo,Dou Zhang
When one considers that outstanding dielectric polymers satisfy the developed requirements in the electronic and electrical industries, it is necessary to explore the structure–property relationship of all-organic polymer dielectrics. In this paper, two kinds of side-chain sulfonyl-containing dipolar polymers based on polyolefin main chains, poly{2,5-bis[(4-(methylsulfonyl)phenyl)oxycarbonyl]styrenes} (PBSO2) and poly{2,5-bis[(4-(methylsulfonyl)ethyl)oxycarbonyl]styrenes} (PESO2), were prepared via radical polymerization. The effect of the side-chain structure on the phase behavior, phase structure, dielectric property, and energy storage of dipolar polymers was investigated. The results showed that PBSO2 possessed a high glass transition temperature (Tg ≈ 195 °C) and formed the columnar nematic phase owing to the rigid side-chain structure. A dielectric constant of 20.8 (25 °C, 103 Hz) was obtained for the polymer PBSO2 due to the highly orientational polarization and the possible interfacial polarization between the amorphous phase and liquid crystalline phase, which is 18% higher than that of PESO2. However, PBSO2 exhibited a low breakdown strength because of the low band gap of ≈3.46 eV and brittleness of the film. In contrast, a low Tg of 78 °C and isotropic phase were found in the polymer PESO2. In addition, a discharge energy density of 6.2 J/m3 at 270 MV/m was achieved, which was attributed to the high dipole density. This study indicates that it is effective to improve the dielectric constant by introducing a liquid crystalline phase into a dipolar polymer, which offers a route for synthesizing high-performance dielectric polymers.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Zhiqiang Zhang,Fan Zhang,Yiwen Niu,Meiyue Li,Jihang Liu,Zhan Jie Wang
Dielectric capacitors typically require high electric fields to achieve excellent energy storage density, which limits the integration, miniaturization, and lifespan of energy storage devices. Therefore, it is essential to obtain good energy storage properties at a lower electric field. In this study, (Ag 0.94 La 0.02 )(Nb 0.85 Ta 0.15 )O 3 (ALNT)-modified (Bi 0.5 Na 0.5 )TiO 3 -based ceramics with improved energy storage characteristics were designed and prepared. The introduction of ALNT is conducive to optimizing the polarization, adjusting the phase composition, disrupting the long-range ferroelectric ordering, and enhancing the dielectric relaxation behavior, leading to an increase in the polarization difference. Accordingly, superior recoverable energy storage density of 3.07 J/cm 3 and high efficiency of 82.7% are synchronously realized under a lower electric field of 150 kV/cm in a 5 mol% ALNT system. In addition, the corresponding sample exhibits wide thermal (40–100°C) and frequency (10–100 Hz) stability and good charge–discharge properties. This study provides a new candidate material for advanced dielectric capacitors that can be applied in lower electric fields.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Lei Zhu,Changyou Zhang,Qiwang Shao,Mengxuan Qin,Qing Li,Chao Peng,Chunchen Yuan,Donghong Wang,Chunyi Zhi
Due to their structural diversity, environmental friendliness, and resource renewability, organic electroactive compounds are versatile hosts for the energy storage of different metal ions. However, the consistency and variety of the energy storage performance and mechanism for the designed organic electrode materials in aqueous electrolytes toward different metal ions have rarely been researched. Here, one type of organic material integrated with anhydride and imide groups was designed and studied in detail. Among the two functional groups, the anhydride carbonyl groups were found to be the dominant contributors during the initial discharge step due to the higher binding energy toward the different metal ions, while the imides were responsible for the second-step coordination with monovalent metal ions. With the increment of the valence of guest metal ions, the activity of the imides decreased and became nearly inactive for the storage of aluminum ions. On the contrary, the anhydride carbonyl groups were always active for the storage of various metal ions and became the capacity contributors when the valence of the metal ions increased. Moreover, similar energy storage behaviors and close potentials were detected during the first discharge step for these different metal ions.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Chemistry
·
2011
·Vol. 55
·期 3
·352-358
·
IF 0
Liu Wei,Sun MingLiang,Wang Wei,Song LingXia,Ge HongLun,Sun Miao,Zhang QingJie
Polyfluorene (PF) film has been successfully electropolymerized at lower potential (0.91 V vs. Ag/AgCl) in the mixed electrolyte of boron trifluoride diethyl etherate and trifluoroacetic acid. The PF film is characterized to have about 10 repeat units and no presence of ketonic defect site. UV-vis and photoluminescent spectral studies indicate that the PF film is blue light emitting. From cyclic voltammetry and galvanostatic charge-discharge tests in 1 M lithium perchlorate/acetonitrile electrolyte, the polyfluorene/activated carbon electrode shows a specific capacitance of 227.1 F g −1 (per active layer mass) and reversible redox reaction at the potential of 1.4 V in a three electrode configuration. An asymmetric electrochemical capacitor based on this composite electrode and activated carbon electrode exhibits a specific energy of 14.7 Wh kg −1 (per active layer mass). These results indicate that electrochemically prepared polyfluorene could be used as energy storage component for electrochemical application.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
RSC Advances
·
2020
·Vol. 10
·期 30
·17768-17776
·
IF 3.119
Guanfeng Lin,Qiong Wang,Xuan Yang,Zhenghan Cai,Yongzhi Xiong,Biao Huang
Biomass-derived porous carbon has received increasing attention as an energy storage device due to its cost-effectiveness, ease of manufacture, environmental friendliness, and sustainability. In this work, phosphorus-doped porous carbon was prepared from biomass sawdust (carbon source) and a small amount of phosphoric acid (P-doping source and gas expanding agent) by one-step carbonization. For comparison, parallel studies without phosphate treatment were performed under the same conditions. Benefiting from the addition of phosphoric acid, the prepared carbon material has higher carbon yield, higher specific area and micropore volume. Due to the heteroatom doping of P in the carbon material, the optimized PC-900 sample not only exhibits high specific capacitances of 292 F g−1 and 169.4 F g−1 at current densities of 0.1 A g−1 and 0.5 A g−1, respectively, but also excellent cycle longevity (98.3% capacitance retention after 5000 cycles) in 1 M H2SO4. In addition, the supercapacitor exhibits a high energy density of 10.6 W h kg−1 when the power density is 224.8 W kg−1 at a discharge current density of 0.5 A g−1. This work proposes a sustainable strategy to reuse waste biomass in high-performance and green supercapacitors for advanced energy storage equipment.
研究领域:
材料科学
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能源工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 29
·16570-16581
·
IF 4.22
Lin Xianxian,Jia Shifang,Liu Jingyi,Li Xiaoke,Guo Xi,Sun Weisheng
The applications of composite phase change materials were limited due to their poor energy utilization efficiency, low thermal conductivity and strong rigidity. In this work, thermally induced flexible wood based on phase change material was fabricated by impregnating delignified wood (DW) with graphene and a novel kind of hyperbranched polyurethane. The wood composite showed excellent softness and flexibility during the heating process of hyperbranched polyurethane. It also displayed suitable phase change temperature (28.1 °C and 36.3 °C) and acceptable latent heat (64.29 J/g and 70.26 J/g) for daily applications. Thermal conductivity of the composite reached 0.417 (W*m −1 K −1 ) after adding graphene, which was enhanced approximately by 414% compared with pure wood. The light harvest efficiency of the composite was also improved after the addition of graphene. Therefore, the thermally induced flexible wood based on phase change material has great potential for building energy conservation and wearable energy storage devices due to its excellent flexibility, high thermal energy storage capacity and outstanding temperature regulating 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
APPLIED ENERGY
·
2020
·
IF 8.848
Hao Sun,Yingjie Li,Xianyao Yan,Jianli Zhao,Zeyan Wang
The calcium looping energy storage is a promising technique for thermochemical energy storage in concentrated solar power plants. Nevertheless, natural CaO-based materials, such as limestone, have an obvious decline in energy storage capacity during cyclic CaO/CaCO 3 energy storage. In this work, a novel Al 2 O 3 /CeO 2 co-doped CaO-based material for energy storage is synthesized by a wet-mixing method. And the thermochemical energy storage performance of the Al 2 O 3 /CeO 2 co-doped CaO-based material under high carbonation pressure is studied. Additionally, the influences of the doping amount of Al 2 O 3 /CeO 2 , the carbonation pressure and the temperature on the energy storage performance of the synthetic material are discussed. The main compositions of the synthetic material are CaO, Ca 12 Al 14 O 33 and CeO 2 . When 5 wt% Al 2 O 3 and 5 wt% CeO 2 are doped on CaO, the synthetic material shows the highest and most stable energy storage capacity under the carbonation pressure of 1.3 MPa during 30 cycles. The Ce 3+ ions existing on the surface of the synthetic material can create oxygen vacancies on the surface of CaO and increase the amount of surface adsorbed oxygen, which facilitates the carbonation of CaO. In addition, the synthetic material possesses strong basicity and provides a large surface area and pore volume during the multicycle energy storage. The high energy storage performance of the synthetic material is attributed to the high pressure in the carbonation process, the good support of Ca 12 Al 14 O 33 and the catalytic function of CeO 2 . The synthetic material can reduce the overall cost in concentrated solar power plants, thus it appears promising.
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
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xiaoyan Zhu,Xiying Han,Rui Guo,Peng Yuan,Liqin Dang,Zonghuai Liu,Zhibin Lei
Poly(3,4-ethylenedioxythiophene) (PEDOT) has emerged as one of promising conductive polymers in energy storage devices. However, the conventional solution oxidative polymerization usually produces PEDOT with low conductivity and limited surface area. This work reports the preparation of highly conductive fibrous PEDOT by a vapor-phase polymerization initialized with Fe 2 O 3 nanosheets that are uniformly electrochemically deposited on the N-doped carbon nanofibers (CNFs) film. The incorporation of highly conductive PEDOT nanofibers expands the film and simultaneously increase the film conductivity by 80 times (103 S cm −1 ). Accordingly, an areal capacitance of 1926 mF cm −2 at 5 mA cm −2 with a PEDOT mass loading of 8.68 mg cm −2 has been achieved. Importantly, the fast pseudocapacitive charge storage mechanism afford the CNF-PEDOT a high-rate capability which retains 68% capacitance in 5–50 mA cm −2 . Especially, the CNF-PEDOT film electrode exhibits an outstanding stability with 87% capacitance retention after 10,000 consecutive charging and discharging cycles at 50 mA cm −2 . A CNF-PEDOT-based supercapacitor delivers an energy density of 97 μWh cm −2 at power density of 0.45 mW cm −2 , surpassing state-of-the-art PEDOT-based devices. This work will open a new avenue for preparing highly conductive PEDOT hybrid electrodes towards high-performance supercapacitors.
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
ACS Applied Energy Materials
·
2022
·
IF 6.959
XiaoYa Hao,Qiong Fu,YaFei Hou,YuanJie Yan,TingYu Fu,Jing Cuan,Peng Du,LaiHui Luo,WeiPing Li
Both high discharge energy density (Ud) and charge–discharge efficiency (η) for nanocomposites are crucial to the development and application of modern electronic devices. However, the large dielectric contrast and ferroelectric phase greatly limit the improvement of Ud and η of poly(vinylidene fluoride) (PVDF)-based nanocomposites. Herein, Bi2O2CO3 (simplified as BOC) nanosheets with low dielectric constant and wide bandgaps and linear poly(methyl methacrylate) (PMMA) were filled into PVDF by solution casting to fabricate x vol % BOC/PAPF (PAPF is short for PMMA/PVDF) nanocomposites. The contributions of BOC nanosheets and linear PMMA, especially for the BOC nanosheet, have been systematically studied. Both experimental and simulation results show that BOC nanosheet and PMMA could improve the breakdown strength and reduce the dielectric loss and leakage current of nanocomposites simultaneously, realizing Ud and η improvement at the same time. As a result, the 1.0 vol % BOC/PAPF nanocomposite shows the highest energy storage performance with Ud = 13.68 J/cm3 and η = 85.72%, which is much superior to PVDF. Therefore, this study might provide a proof-of-concept for constructing nanocomposites with excellent Ud and η concurrently.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Bin He,Wuwei Feng,Meitang Liu,Jigong Hao,Hong Zheng,Yuqin Liu,Shuo Liu,Cheng Hu,He Qi
Herein, NaTaO 3 (NT) is introduced into 0.7Bi 0.5 Na 0.5 TiO 3 -0.3 Sr 0.7 La 0.2 TiO 3 (BNSLT) ceramic to increase the content of the highly stable P4bm phase, constructing a temperature-insensitive phase structure and permittivity over a wide temperature range (25–300 °C); thus, excellent thermal stability ( W rec = 4.68 ± 0.50 J/cm 3 , η = 89.0 ± 2.1%) over an ultra-wide temperature range (20–240 °C) is realized, superior to most lead-free ceramics. The co-substitution of heterovalent ions at both A and B sites in BNSLT leads to enhanced relaxor state and bandgap, delayed saturation polarization, reduced grain size and permittivity. Thereby, an excellent recoverable energy storage density ( W rec = 8.55 J/cm 3 ), high efficiency ( η = 89.5%), and extremely high power density ( P D = 320 MW/cm 3 at 280 kV/cm) are obtained in BNSLT-8%NT ceramics. This work offers a new paradigm for the development of ceramic capacitors with both excellent comprehensive energy storage performance and high-temperature working stability.
研究领域:
材料科学
·
电子工程
✓ 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）