ACS Applied Materials & Interfaces
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2022
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IF 10.383
Zeyun Wu,Yiyang Zhang,Zuoqing Liu,Haorui Ma,Xing Jin,Guangming Yang,Yixiang Shi,Zongping Shao,Shuiqing Li
Perovskite-type proton-conducting materials, such as BaCe0.7Zr0.1Y0.1Yb0.1O3−δ (BCZYYb), are very attractive for the next-generation equipment of electrochemical energy conversion and storage owing to their excellent conductivity in the intermediate-temperature range (300–750 °C), as well as good thermo-chemical stability, coking resistance, and sulfur tolerance. However, the lack of a reliable and cost-effective synthesis method for such multi-component co-doping oxides limits their large-scale application. In this study, for the first time, we successfully synthesize BCZYYb electrolyte nanopowders by using a rapid, scalable flame-based gas-phase synthesis method with two different barium precursors Ba(NO3)2 and Ba(CH3COO)2, named as BCZYYb (N) and BCZYYb (CA). The as-synthesized nanoparticles exhibit good crystallinity of the pure orthorhombic perovskite BCZYYb phase. BCZYYb (CA) shows more uniform doping with the element ratio of 1:0.74:0.12:0.08:0.1, which is very close to the theoretical value. The shrinkage and surface SEM (scanning electron microscope) results indicate that the flame-made powders have superior sinterability compared to the sol–gel-made powders because of the smaller primary particle size (∼20 nm). Electrochemical impedance spectroscopy tests show that BCZYYb (CA) sintered at 1450 °C has the highest protonic conductivity of 1.31 × 10–2 S cm–1 in wet H2 when operating at 600 °C and still maintains a high-level conductivity of 1.19 × 10–2 S cm–1 even when the sintering temperature is reduced to 1350 °C, which is mainly attributed to uniform doping and good sinterability. The activation energy for the conductivity of BCZYYb (CA) is also significantly lower than that of conventional electrolytes, which suggests much better conductivity in the intermediate (∼600 °C) and even lower operating temperature. The excellent conductivity performance combined with the high-throughput production capability makes the swirling spray flame a promising synthesis method for promoting the BCZYYb electrolytes from lab to industrial-scale solid oxide fuel cells.
研究领域:
材料科学
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电化学
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能源转换与存储
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 109
·期 1
·e70451
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IF 3.8
Yunkun Chen,Yewei Zhang,Xiangyu Li,Andong Li,Kangkang Yuan,Xiaotong Jin,Xuena Yang,Yunli Guo,Yujun Zhao,Chengshun Li
Barium hexaaluminate (BaAl 12 O 19 , BAO) presents as a highly promising fibrous material for high-temperature insulation due to its high melting point, low thermal conductivity, and exceptional chemical and phase stability. The magnetoplumbite crystal structure, characterized by alternating stacks of spinel and mirror phases, may serve as a powerful strategy to overcome the high-temperature brittleness and structural failure of conventional oxide fibers by effectively suppressing grain coarsening. Using electrospinning combined with high-temperature thermal treatment, BAO fibrous membranes were successfully prepared in the present work. The pyrolysis process, phase composition evolution, microstructure, and grain size changes of the BAO precursor fibrous membranes were systematically characterized. Additionally, thermal conductivity, high-temperature stability, thermal insulation performance, and fire retardancy of BAO fibrous membranes were also tested. The results indicated that the BAO fibrous membranes possessed room temperature thermal conductivity as low as 32.1 mW·m −1 ·K −1 , small average linear shrinkage of 2.76% at 1300°C, and good structural integrity even at 1430°C. The excellent high-temperature stability and thermal insulation performance of the BAO fibrous membranes make them promising for applications in extreme environments such as aerospace thermal protection and industrial high-temperature gas filtration.
研究领域:
材料科学
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陶瓷
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热工工程
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纳米纤维
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高温材料
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DOI
高影响因子
Surfaces and Interfaces
·
2026
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IF 6.3
Yue Zhao,Zhaotian Ba,Yu Long,Yuanyi Kang,Tao Zhang,Meng Xin,Guohua Fan,Chuncheng Hao
The performance contradiction between dielectric constant and breakdown strength restricted the significant improvement in energy storage density of common dielectrics. In this work, the ternary BaTiO 3 @Ag/PVDF composites were prepared, in which the fibrous BaTiO 3 fillers were prepared by electrospinning and further modified with silver (Ag) nanoparticles via silver mirror reaction. Dielectric performance of the composites was effectively improved by the hybrid fillers owing to the synergies of the increased polarizations and the Coulomb blockade effect. Dielectric constant and breakdown strength of the composites with only 0.2 wt% filling content reached 14.8 and 421.7 MV/m, which were respectively increased 124.4% and 135.9% compared to that of the pristine PVDF. And the maximum energy storage density was increased to 4.5 J/cm 3 with the ultra-low content of fillers. This work broke the inherent contradictions in single-layer composites and provided novel attempts for dielectric modulation of dielectrics.
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DOI
高影响因子
Nano Energy
·
2026
·
IF 16.7
Hongguang Sun,Biaolin Peng,Kun Peng,Yi Chen,Ying Qiu,Min Wang,Kanghua Li,Zhonghui Shen,Tianwen Dong,Liang Liao,Ming Luo,Shujun Zhang,Xi Xiao,Qiuyun Fu,ZhongLin Wang
A novel ferroelastic domain reconfiguration mechanism delivers giant thermo-optic response in sol–gel barium titanate (BTO) thin films. • 750 °C-annealed BTO achieves record thermo-optic coefficient of 9.69×10⁻⁴ °C⁻¹, multiple times higher than silicon. • Fully reversible a-c domain switching is realized within the practical 25 °C-100 °C working window for on-chip photonic devices. • Prototype Fabry-Pérot modulator reaches 40% modulation depth for photonic integrated circuits and wavelength selective switching. • The domain engineering strategy is potentially extendable to CMOS-compatible ferroelectric perovskites. Thermo-optic tuning in ferroelectric perovskites has emerged as a promising strategy for achieving broadband, energy-efficient optical modulation. Nevertheless, the physical origins governing the near-room-temperature thermo-optic response of ferroelectrics are still not clearly defined. In this work, we report a previously unexplored thermo-optic mechanism in sol-gel-processed (001)-oriented BaTiO₃ films. This mechanism is driven by thermally induced, reversible a-c ferroelastic domain switching, activated through the synergistic control of interfacial screening, domain, and defect engineering, resulting in a large change in refractive index in the 25°C-100 °C temperature range. Films crystallized at 750 °C exhibit high tetragonal phase purity, strong c-axis alignment, and an exceptional thermo-optic coefficient of 9.69×10 -4 °C⁻¹—over several times larger than that of crystalline silicon—together with reversible domain evolution upon thermal cycling. A Fabry-Pérot thermo-optic modulator incorporating this film delivers 40% intensity modulation in the C-band. These findings establish a ferroelastic-domain-driven route to thermo-optic enhancement in ferroelectric perovskites and lay the groundwork for scalable. Download: Download high-res image (175KB) Download: Download full-size image Fig. X: TOC Graphic.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·Vol. 14
·期 35
·15530-15540
·
IF 7.6
Liu Jinpeng,Deng Runze,Mai Songlang,Zou Yuanhua,Marwat Mohsin Ali,Wang Junya,Tran Nguyen-Minh-An,Zhu Hanfei,Zhang Haibo,Tan Hua
Dielectric thin film capacitors are characterized by high energy density, rapid charge-discharge, high usable efficiency, and high breakdown field strength, and are widely used in electronics and novel energy technologies. To address the trade-off among polarization, efficiency, and breakdown strength in traditional single-layer dielectric capacitors, this study employs a low-cost sol-gel method to synthesize a BTO/PLCT/BTO sandwich structure film. By optimizing the annealing process, an amorphous/ferroelectric/amorphous multilayer phase structure coexistence was achieved. With increasing annealing temperature, the polarized nanoregions within the amorphous BTO layer expand, while the PLCT layer crystallizes into a ferroelectric phase. At 600 ° C, the synergistic amorphous/ferroelectric/amorphous phase effect is optimized, yielding an energy storage density of 80 J/cm 3 and an efficiency of 86% under an electric field of 5.4 MV/cm. Meanwhile, from room temperature to 150 ° C, the film achieves excellent dielectric and energy storage stability over a wide temperature range (variation rates of dielectric property and energy storage performance below 5%). After 10 9 fatigue cycles, the film still maintains the stability of its electrical performance (variation rate of Δ W rec /Δ W rec-initial ≤ 4%). This amorphous/ferroelectric/amorphous composite film overcomes the trade-off among polarization, usable efficiency, and breakdown strength inherent in single-phase materials, providing a viable strategy for fabricating high-stability energy storage films.
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2026
·
IF 6
Qingyuan Sheng,Jiahui Zhu,Xiaofei Zhu,Qiwei Chen,Shangyu Li,Wenfu Yan,Defeng Zhou,Jinghe Bai
Improving the oxygen reduction reduction activity and thermal stability of cathode materials is critical to advancing the commercialization of intermediate-temperature solid oxide fuel cells (IT-SOFCs). In this study, a high-performance mixed ionic-electronic conductor (MIEC) BaCo 0.8 Ta 0.2 O 3-δ phase is incorporated into the lattice of NdBaCo 2 O 5+δ (NBC) double perovskite. Such composite construction elevates the oxygen vacancy concentration, lowers the thermal expansion coefficient (TEC) of NBC-based materials, and simultaneously improves electrocatalytic activity and long-term operational durability of IT-SOFCs. By fitting the distribution of relaxation times, it is concluded that the composite cathode material (NBC&BCT2) significantly accelerates the oxygen dissociation and adsorption kinetics compared with NBC. At 700 °C, the symmetric cell with NBC&BCT2 exhibits an area-specific resistance of only 0.034 Ω cm 2 , approximately 23% of that of NBC. When used as the cathode in IT-SOFCs, the NBC&BCT2-based cells achieve a maximum power density of 1.01 W cm 2 at 700 °C, which is 1.4 times higher than that of NBC. Furthermore, composite modification with BCT alleviates the long-term stability drawbacks originating from the excessively high TEC of Co-based materials. Single cells equipped with NBC&BCT2 maintain stable operation over 100 h under a constant rated voltage, with an output current density 1.5 times higher than that of NBC-based cells. This work establishes a reliable modification strategy to promote the electrocatalytic performance of Co-based perovskites and resolve stability limitations induced by high TEC.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·Vol. 14
·期 35
·15666-15679
·
IF 7.6
Dang Chen,Che Jian,Ma Ben,Song Jiahao,Cheng Lin,Zhou Yingke
Developing sustainable and robust proton-conducting solid oxide fuel cells (H-SOFCs) requires overcoming the sluggish oxygen reduction reaction (ORR) and degradation of traditional rare-earth-containing perovskite cathodes. To address this, we propose a rare-earth-free metal-cation-deficient spinel structure to modulate the defect chemistry and surface reaction kinetics of the cathode. A series of Mn-deficient manganese-cobalt spinels, Mn 1– X Co 2 O 4 ( X = 0–0.15), were synthesized. Combined experimental characterizations and density functional theory (DFT) calculations systematically reveal the influence of cation vacancies on the synergistic transport of electrons, protons, and oxygen ions, alongside overall ORR activity. Results indicate that moderate Mn deficiency preserves the spinel structure while inducing a higher concentration of oxygen vacancies. This structural evolution enhances small-polaron hopping conductivity, significantly promotes H 2 O adsorption and hydration reactions, and lowers both oxygen vacancy formation energy and proton migration barriers. Consequently, the optimized Mn 0.9 Co 2 O 4 cathode achieves a remarkably low polarization resistance of 0.123 Ω cm 2 at 700 ° C. Furthermore, an anode-supported single cell integrated with this cathode delivers a peak power density of 980 mW/cm 2 at 700 ° C and maintains stable operation over an 80-h test. Therefore, constructing a metal-deficient spinel structure serves as a defect engineering strategy to elevate the electrocatalytic activity and durability of H-SOFC cathodes.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Qingyuan Sheng,Yaping Zhang,Xiaofei Zhu,Qiwei Chen,Shangyu Li,Jinghe Bai,Wenfu Yan,Defeng Zhou
Enhancing the oxygen reduction catalytic activity and thermal compatibility of cathode materials under intermediate-temperature conditions remains pivotal for advancing the commercialization of solid oxide fuel cells (SOFCs). Therefore, this article regulates the crystal structure of NdBaCo 2 O 5+δ (NBC)-based double perovskite by Cu, replacing Co with a small amount of Cu ions to increase the oxygen vacancy content of the cathode material and reduce the thermal expansion coefficient (TEC) of NBC-based materials, to improve the electric catalytic activity and long-term stability of SOFC. The distribution of relaxation time results confirms that compared with NBC, NdBaCo 1.8 Cu 0.2 O 5+δ (NBCC2) can greatly enhance oxygen's dissociation and adsorption rates. As a symmetrical cell at 650 °C, the area-specific resistance (ASR) of NBCC2 is only 0.067 Ω cm −2 , which is about 40 % of NBC. As the cathode of SOFC, the maximum power density of the NBCC2-based cell reaches 0.67 W cm 2 , which is 1.58 times that of NBC, and Cu doping improves the long-term stability problem caused by the high TEC of Co-based materials. This study provides an effective solution for further enhancing the electrocatalytic activity of Co-based perovskite and addressing stability issues caused by high TEC.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yue Jia,Han Zhang,Huiyan Zhou,Yan Wang,Caiming Wang,Mengchen Yang,Chunxue Zhai,Xiaofei Qi,Dengwei Hu,Lili Zhao,Bin Cui
Flexible dielectrics play a crucial role in the advancement of capacitors. However, their limited energy storage density is an obstacle to both their application scope and miniaturization efforts. Inspired by an “egg effect”, this study introduces an innovative egg-like ceramic filler, namely Ba 0.34 Sr 0.51 Ca 0.15 Zr 0.1 Ti 0.9 O 3 -Y@Ba 0.34 Sr 0.51 Ca 0.15 Zr 0.1 Ti 0.9 O 3 -Mn@ZrO 2 (BSCZT-Y@BSCZT-Mn@ZrO 2 ), which is developed via a core–shell doping process. The separation of electrons and holes in the “egg yolk” (donor-rich core) and “egg white” (acceptor-rich shell) coupled with the current-limiting “eggshell” (wide bandgap oxide) in the ceramic fillers, resulting in a large effective polarization Δ P , a higher dielectric permittivity ε r , a lower tan δ , and a significant increase in the discharged energy storage density W rec of the composites. Together with the phase transition from α-PVDF to β-PVDF caused by the electrostatic interaction between fillers and PVDF, an ultra-high W rec of 33.2 J/cm 3 is achieved in the BSCZT-Y@BSCZT-Mn3@ZrO 2 /PVDF, which has the Δ P of 28.5 μC/cm 2 at 296.7 MV/m, along with ε r of 21.7 and tan δ of 0.018 at 1 kHz. Significantly, the composite film exhibits outstanding bending endurance. Even after 600 full bends, over 92 % of the capacitance retention rate can be retained. This research highlights the potential of ceramic filler structural design for flexible capacitors in low-power flexible electronics.
研究领域:
材料科学
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电气工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Shuimiao Xia,Yinguo Li,Linwei Zhu,Qingyang Tang,Zelong Chang,Zengliang Ren,Davoud Dastan,Zhicheng Shi
Polymer films are promising dielectric materials for energy storage capacitors due to their light weight and flexibility. However, the adverse coupling between the permittivity and the breakdown strength presents a significant challenge for the enhancement of energy storage, especially at high temperatures. In this work, the Au@AO@Au@BT metal/ceramic composite nanofibers are prepared, in which barium titanate (BT) ceramic is used as the core to improve the permittivity and heat resistance of the nanocomposites. Aluminum oxide (AO) provides excellent interfacial compatibility, and the breakdown strength of the nanocomposite is enhanced by gold nanoparticles (Au NPs) with Coulomb blockade effect. This strategy achieves the compatibility of high permittivity and breakdown strength and improves the energy storage performance. As a result, the nanocomposites containing 0.3 wt% nanofibers achieve an ultra-high energy density of 8.64 J/cm 3 at 200 °C with an efficiency > 80 %, which is improved by 256 % compared to pure PEI (2.43 J/cm 3 ).
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jie Yang,Yaping Zhang,Xiaofei Zhu,Jinghe Bai,Shangyu Li,Wenfu Yan,Defeng Zhou
This study is based on the modification effect and mechanism analysis of transition state metal ions on NdBaCo 1.9 M 0.1 O 5+δ -based (M = Cu, Sc, Co, Ti) double perovskite. Research has shown that introducing a small amount of large radius, low valence Cu ions into Co-based double perovskite will comprehensively improve the electrochemical performance and stability of SOFCs. At 700 °C, NdBaCo 1.9 Cu 0.1 O 5+δ (NBCCu) exhibited the highest surface oxygen exchange coefficient (5.96 × 10 -4 cm s −1 ) and bulk diffusion coefficient (4.74 × 10 -5 cm s −1 ). As a symmetrical cell, the area specific resistance of NBCCu is only 0.041 Ω cm 2 , which is 53.2 % of NdBaCo 2 O 5+δ (NBC). When NBCCu is used as the cathode of a single cell, the maximum power density can reach 1.12 W cm −2 , which is 1.4 times that of NBC-based single cells. According to the distribution of relaxation time results, NBCCu can comprehensively improve the adsorption and dissociation rates of surface oxygen as well as the charge transfer rate. According to the changes in the radius and valence state of transition metal ions, the introduction of Cu ions endows NBCCu double perovskite with a B-site ion reduction mechanism, a large radius ion enhanced free volume mechanism, and a lattice distortion mechanism caused by doping. The synergistic effect of these three mechanisms enhances the electrocatalytic activity of the cathode. Furthermore, compared to NBC-based single cells, NBCCu-based single cells demonstrated more outstanding long-term stability during testing at a constant current of 0.54 A cm −2 for about 110 h at 700 °C. This study provides an effective approach for efficiently screening transition state metal ion doped perovskites to enhance their electrocatalytic activity and stability.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yiming Yao,Cheng Tao,Rui Huang,Jian Zhang,Tianyu Zhang,Hua Hao,Zhonghua Yao,Hanxing Liu,Minghe Cao
Amorphous thin films have widely study due to the excellent breakdown strength and energy storage efficiency in recent years. However, there still exist enormous challenges for practical application due to relatively low polarization and energy density. Herein, we propose a multi variable valence ions doping strategy to enhance the energy storage performance of BaTiO 3 -based amorphous thin films. The Ba 0.92 Bi 0.08 Ti 1-x (Ni 0.5 Mn 0.5 ) x O 3 (BBTNM) amorphous thin films were fabricated by chemical solution deposition method. In addition, the synergistic effects of variable valence ions (Ni, Mn) on the microstructure, dielectric and energy storage properties of the films were systematically studied. Compared with the undoped Ba 0.92 Bi 0.08 TiO 3 (BBT) film, the polarization and energy storage performance of the BBTNM film have been significantly improved owing to the defect dipoles generated by the incorporation of variable valence ions. Notably,a high discharge energy density of 93.3 J/cm 3 together with energy efficiency of 83 % could be achieved in the x=0.08 film at 7.05 MV/cm. Simultaneously, the film exhibits excellent thermal stability within the range of 20 °C to 160 °C, and still maintains favorable performance after 10 5 cycling. Overall, this work introduces a new approach for designing BaTiO 3 -based thin film materials.
研究领域:
材料科学
·
能源存储
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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）