ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shuai Chen,Ting Wang,Shaoxiong Xie,Jiaju Leng,Qingfeng Zhu,Kai Li,Weiping Gong,Jianguo Zhu,Qingyuan Wang
Dielectric capacitors are employed extensively due to their exceptional performance, including a rapid charge–discharge speed and superior power density. However, their practical implementation is hindered by constraints in energy-storage density (ESD), efficiency (ESE), and thermal stability. To achieve domain engineering and improved relaxor behavior in 0.67BiFeO3-0.33BaTiO3-based Pb-free ceramics, the concerns have been addressed here by employing a synergistic high-entropy strategy involving the design of the composition of Sr(Mg1/6Zn1/6Ta1/3Nb1/3)O3 with B-site multielement coexistence and high configuration entropy. Remarkably, in (0.67-x)BiFeO3-0.33BaTiO3-xSr(Mg1/6Zn1/6Ta1/3Nb1/3)O3 ceramics with x = 0.08, a good ESE (η) of 75% and a recoverable ESD (Wrec) of 2.4 J/cm3 at 190 kV/cm were attained together with an ultrahigh hardness of ∼7.2 GPa. The high-entropy strategy, which is tailored by an increase in configuration entropy, can be attributed to the superior mechanical and ES properties. It also explains the enhanced random field and relaxation behavior, the structural coexistence of ferroelectric rhombohedral (R3c) and nonpolar pseudocubic (Pm-3m) symmetries, the decreased domain size, and evenly distributed polar nanoregions (PNRs). Moreover, improved thermal stability and outstanding frequency stability are also obtained. By boosting the configuration entropy, BiFeO3–BaTiO3 materials dramatically improved their complete energy storage performance. This suggests that designing high-performance dielectrics with high entropy can be a convenient yet effective technique, leading to the development of advanced capacitors.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Jian Wang,Biyun Peng,Yifei Zhang,Honghong Gong,Baohui Wang,Wentao Wu,Lijun He,Sen Liang,Yunchuan Xie
PVDF-based polymers have garnered significant attention in the field of high-power density electrostatic capacitors due to their exceptional dielectric strength . However, their practical applications are constrained by low charge-discharge efficiency ( η ) and energy storage density ( U e ), which stem from high ferroelectric relaxation and low breakdown strength ( E b ). Here, a hydrogenated glassy polymer poly(styrene-methyl methacrylate-methylallyl alcohol) (PSMA) is designed and synthesized to be homogeneously distributed in PVDF through voltage-assisted 3D printing-hot pressing, resulting in a flexible composite film . The findings demonstrate that PSMA, rich in hydrogen bonds and high modulus strength, effectively mitigates the ferroelectric phase transition of PVDF to enhance η . Additionally, the voltage-assisted 3D printing process induces an entropy gain mechanism, facilitating the uniform distribution of the two phases and enhancing the interfacial properties for enhancing E b . Remarkably, the study achieves prominent growth in energy storage performance, with U e and η reaching 18.1 J/cm 3 and 80 % at 525 MV/m, respectively. These remarkable results highlight the potential of 3D printing technology in enhancing the energy storage performance of PVDF-based dielectrics.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Jiawei Zhang,Jian Wang,Dandan Gao,Huan Liu,Jiyang Xie,Wanbiao Hu
Ceramic-based capacitors for energy storage devices require simultaneously high energy density and efficiency. Achieving high electric breakdown field based on linear dielectrics is crucial. Here, A-site Sm 3+ doped perovskite Ca 1-1.5 x Sm x □ 0.5 x TiO 3 ceramics with introduced A-site vacancies ( V A ) were prepared. All Ca 1-1.5 x Sm x □ 0.5 x TiO 3 ceramics crystallize in an orthorhombic structure, with lattice constants a , b , and c linearly decreased. As a result of Sm 3+ dopants and V A , the grain size decreased while the ceramics’ density was improved. The permittivity decreases from 176 ( x = 0) to 135 ( x = 0.1), but tan δ is effectively constrained (∼10 −4 ). What’s more, the dielectric breakdown strength is significantly improved from 429 kV/cm ( x = 0) to 547 kV/cm ( x = 0.1) with dielectric linearity is maintained. The optimum energy storage density of 2 J/cm 3 ( x = 0.02) with ultrahigh energy efficiency of over 93.7 % is achieved, which are superior to many existing linear dielectrics and relaxor ferroelectrics. This work confirms the energy-storage enhancement through chemical modifications and microstructural engineering.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Shibing Ren,Xingzhao Liu,Min Li,Jiamin Yan,Mu Yang,Ge Wang
Traditional shape-stabilized Phase Change Materials (PCMs) are generally obtained by vacuum impregnation PCM into prefabricated porous supports, and therefore, they have fixed shapes. The preparation process is complicated, and the energy storage density is low. Herein, we report a new synthetic method to obtain vermiculite nanosheets (VNSs) by exfoliation of Expanded Vermiculite (EVM), take metal ions to disrupt the electrostatic repulsion between VNSs, shape in-situ a three-dimensional porous network, and restrict the flow of PEG to obtain VNSs-based composite PCMs. By regulating the size of VNSs to obtain stable thermal properties and adding nano-Al 2 O 3 to increase the nucleation sites to improve the energy storage efficiency and thermal conductivity. The composite PCMs own high energy storage density, up to 90.76 %, high thermal conductivity of 0.47 W/m·K, an increase of 80.77 % compared to pure PEG. At the same time, the composite PCMs are flexible and can be reshaped above the phase transition temperature. It brings a new synthetic method for the preparation of composite PCMs and broadens the application scope of PCMs.
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
·
2023
·
IF 15.1
Tao Deng,Zhen Liu,Tengfei Hu,Kai Dai,Zhigao Hu,Genshui Wang
The comprehensive performance of ferroelectric ceramic materials is a significant factor limiting the practical application. In this work, a novel strategy of constructing diphase compounds is proposed to significantly enhance the energy storage properties of Bi 0.5 Na 0.5 TiO 3 -based ceramics. A composite ceramic of pyrochlore phase Sm 2 Ti 2 O 7 modified perovskite phase Bi 0.5 Na 0.5 TiO 3 is successfully prepared and systematically studied. As the concentration of Sm 2 Ti 2 O 7 increases, the dielectric breakdown strength is greatly strengthened because of expanded band gap and shrunk grain size, and the relaxor behavior is enhanced due to the effect of linear character pyrochlore. As a result, the optimized composition demonstrates excellent energy storage properties including high recoverable energy storage density ( W rec ) of 6.387 J/cm 3 at 402 kV/cm, superior stability of temperature (<6% variation in − 120 ∼ 120 °C), frequency (∼4% variation in 5 ∼ 500 Hz) and cycling (∼2% variation within 10 6 cycles). Besides, fast discharge behavior of t 0.9 ∼ 29.4 ns and high power density of 80.49 MW/cm 3 at 200 kV/cm are also achieved. This study presents a novel strategy to enhance the performance of BNT-based materials through forming composite ceramic, which is anticipated to be a general method for other material systems as regards the design of advanced energy storage ceramics.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jian Wang,Miaomiao Zuo,Chenyang Tang,Weihao Dai,Yifei Zhang,Biyun Peng,Sen Liang,Xin Hu,Ning Zhu
Polymer dielectric capacitors are crucial devices of high-power electrical systems for capacitive energy storage. The large conduction loss of polymer dielectrics at elevated temperatures and electric fields is the main challenge. Herein, dielectric nanocomposites of BNNS/poly(aryl ether ketone) (PAEK) regulated by interfacial engineering and band alignment are presented, significantly restraining the conduction loss and greatly enhancing the energy storage density at high temperatures and high electric fields. Dual-functionalized BNNS with −NH2 and −F groups (F–BNNS–NH2) were prepared and incorporated into carboxylate-functionalized PAEK (PAEK–COOH) to form robust interfacial bonding via an amino-carboxyl reaction, enabling excellent thermal stability and mechanical properties of the composites. Meanwhile, the electron-withdrawing nature of the −F group regulated the BNNS band structure to achieve widened Eg, which is responsible for the generation of electrons and holes trappings. At optimal conditions, a record-high breakdown strength of 600 MV/m with an energy density of 5.58 J/cm3 and an energy density of 5.01 J/cm3 at an efficiency of 90% is realized at 150 °C, which surpasses most reported nanocomposite dielectrics. This work establishes a paradigm for harmonizing interfacial reinforcement with electronic structure regulation in extreme-condition energy storage dielectrics.
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
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 22
·7956-7965
·
IF 5.7
Yuxuan Hou,Junjie Li,Ruowei Yin,Xiaopo Su,Yanjing Su,Lijie Qiao,Chuanbao Liu,Qian Li,Yang Bai
Development of microelectronic technology is highly desired to address chip power instability and micro-overheating in highly integrated devices utilizing a single material. For this purpose, we propose an efficient strategy by using a ferroelectric thin film to achieve the multifunction of chip power and thermal management. The Pb0.91La0.06Zr0.8Ti0.2O3 (PLZT) thin films undergo nucleation and growth in the (100) preferred orientation on the LaNiO3 bottom electrode during the layer-by-layer annealing process. The obtained chorogi-like structure with both lamellar and columnar nanocrystals results in a high breakdown strength of 4224 kV cm−1, accompanied by an exceptional recoverable energy storage density (Wrec) of 43.20 J cm−3. A large adiabatic temperature change (ΔT) of 27.25 K (@2000 kV cm−1) is obtained near the depolarization temperature, and the broad temperature span (80% ΔTmax) is larger than 50 °C. Moreover, PLZT thin films demonstrate a pyroelectric coefficient (π) of −145 μC cm−2 K−1 with high temperature stability, whose excellent thermal detection capability is confirmed by the infrared response measurement. Above all, the excellent energy storage, electrocaloric effect and pyroelectric properties of the PLZT thin films make them highly promising to inhibit the damage of abrupt current/voltage and uneven heat dissipation for applications in chip power and thermal management.
研究领域:
材料科学
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电子工程
·
能源技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yongqing Xu,Bowen Lu,Cong Luo,Fan Wu,Xiaoshan Li,Liqi Zhang
Calcium looping (CaL) is a promising thermochemical energy storage (TCES) technology to convert solar energy to power in CO 2 Brayton cycle. However, the energy storage density (ESD) of the CaO-based heat carries decays drastically over the CaL cycles, and the energy storage performance of the CaO-based materials in a close-loop CaL-TCES system is still unclear. In this work, a novel Na 2 CO 3 modified method was proposed to enhance the ESD of the CaO-based materials over the close-loop CaL-TCES process, and the enhancing mechanism was investigated by the simultaneous thermal analyzer, X-ray diffraction, electron microscopy, N 2 physisorption, X-ray photoelectron spectroscopy. The “10Na 2 CO 3 /CaO” showed more promising ESD over the cycles, even though it suffered sintering. After 60 cycles, the “10Na 2 CO 3 /CaO” still held an ESD of 594 kJ/kg, which was 2.27 times that of “Neat CaO” when cycled at “850 °C–900 °C” mode. Increase the carbonation temperature from 650 °C to 850 °C, the cyclic energy storage densities of the “10Na 2 CO 3 /CaO” ascended rapidly, which was opposite to the “Neat CaO”. The optimum operating condition for the “10Na 2 CO 3 /CaO” is “850 °C–900 °C” when operated in the close-loop CaL-TCES system. The Na + species that enriched on the surface of the CaO grains were in amorphous or melting state, and they would react with CaO to form Na-Ca solid solution over the cycles. The “10Na 2 CO 3 /CaO” has a tendency of sintering over the cycles, but Na 2 CO 3 improves reaction kinetics. One suggested mechanism is that the Na + species may break through the mass transfer barriers to absorb CO 2 during the carbonation process. Therefore, although the Na 2 CO 3 doped CaO materials had poorer surface topography, they held much higher ESD over the repeated cycles.
研究领域:
材料科学
·
可再生能源
·
太阳能技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Junyang Zeng,Jingjing Yan,Bao-Wen Li,Xin Zhang
High dielectric constant ( ε r ) inorganic nanoparticles reinforced dielectric polymer nanocomposites have been intensively investigated for energy storage applications in current electrical and electronic systems. Although the incorporation of high- ε r inorganic nanoparticles can improve the ε r of the composites to a certain extent, it will also greatly reduce the overall breakdown strength ( E b ) of the materials, which ultimately hinders the effective improvement of the energy storage density of the composites. In this paper, an approach is developed to modify high- ε r BaTiO 3 (BTO) nanoparticles with polyimide (PI) polymer shells (PI@BTO) through an in-situ polymerization process in the polyetherimide (PEI)-based nanocomposites. The constructed PI shell improves the compatibility of the inorganic/organic interface, resulting in a uniform dispersion of nanoparticles in the PEI matrix. In particular, the spontaneous electrostatic interaction between polymer chains in the PI shell and PEI matrix enables an increased E b of the PEI/PI@BTO nanocomposite over the pure PEI, which leads to a high energy storage density ( U e ) of 6.2 J/cm 3 and a high charge-discharge efficiency (η) above 80% in the PEI nanocomposites, with an enhancement of 150% over pure PEI. In this paper, a convenient and efficient interfacial modification technique is provided for the development of flexible high energy storage density polymer/inorganic nanoparticle composites for dielectric and energy storage applications.
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
·
2022
·
IF 16.744
Jiale Mao,Shuang Wang,Yonghong Cheng,Bing Xiao,Lei Zhang,Ding Ai,Yu Chen,Wenjie Sun,Jiaming Luo
Capacitor dielectric films exhibiting high energy storage density and efficiency within a wide operating temperature range are crucial for advancing electrical and electronic devices. The low energy storage density and working temperature as well as the high manufacturing costs of the state-of-the-art BOPP films limit their use as an energy storage unit for developing smart grids or the internet of things, while most of the polymer-based dielectric films reported currently are facing the issues of the rapid efficiency deterioration with the increasing of temperature. In this work, the high energy storage density and efficiency are achieved in the low-cost flexible epoxy films innovatively modified by trifluoro-phenyl group functionalization. Introducing strongly electronegative fluorinated phenyl groups greatly improves the energy storage density due to the increase of the total molecular dipole moment of the polymer film. Meanwhile, achieving the high energy storage efficiency is accomplished via gradually increasing the charge trapping site density of epoxy resins functionalized with different densities of fluorinated phenyl groups, which can be demonstrated through both thermally stimulated current (TSC) spectroscopy and the first-principles calculations results. Finally, it is experimentally demonstrated that deeper charge traps can be obtained in slightly crosslinked trifluoro-phenyl functionalized epoxy films, resulting in an energy storage density of 3.31 J/cm 3 and a high energy storage efficiency of 95% at 100 °C.
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
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Jiuao Wang,Hao Yue,Zongliang Du,Xu Cheng,Haibo Wang,Xiaosheng Du
The development of form-stable phase change materials (PCMs) with flame retardancy and the visual thermal storage process is crucial for their application in building energy conservation. Herein, an active phosphorus/ammonium-containing non-formaldehyde flame retardant (APA) was synthesized based on the natural compound phytic acid. Then, wood-based form-stable PCM composites (PTPCMs) with high energy storage density, excellent flame retardancy, and real-time and visual reversible thermochromic properties were successfully fabricated by impregnating the thermochromic compound into the APA-grafted delignified wood. The delignified wood well supports the solid–liquid PCMs and avoids their liquid leakage during phase transition due to the high surface tension and strong capillary effect. The differential scanning calorimetry (DSC) results showed that the PTPCMs possessed high thermal energy storage density (165.3–198.6 J/g) and reliable thermal stability. With the concentration of the flame-retardant APA increased, the peak heat release rate (pHRR) and total heat release (THR) of PTPCMs reduced noticeably, demonstrating the enhanced flame retardancy of PTPCMs. Moreover, PTPCM composites had good thermoregulation properties and the visualization of the phase transition process was made possible by the reversible thermochromic properties. In summary, the novel PTPCMs show tremendous application potential for efficient building energy conservation.
研究领域:
材料科学
·
能源工程
·
建筑技术
✓ 已验证
产品关联
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
危险品化学品经营许可证（带存储）