Journal of Energy Storage
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2024
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IF 8.9
Qinqiang Guo,Zhonghua Dai,Chenxi Liu,Yuanyuan Zheng,Xin Zhao,Weiguo Liu,Yu Cong,Shuitao Gu
The energy issue is currently a highly significant topic of concern, and the development of environmentally friendly and high-performance lead-free energy storage devices is fundamental to solving energy problems, but it also poses challenges. Lead-free environmentally friendly (Bi 0.5 Na 0.5 )TiO 3 [BNT] has attracted widespread attention due to its high polarization, but its low efficiency greatly affects its practical application. In this study, 1- x (Bi 0.5 Na 0.5 )TiO 3 - x Ca(Ti 0.8 Ta 0.16 )O 3 [1- x BNT- x CTT]ceramics were prepared to investigate the relationship between their microstructure and macro energy storage properties. With the introduction of CTT, the long-range order was broken, reducing the grain size; the introduction of high bandgap energy Ta 2 O 5 reduced residual polarization and improved the energy storage efficiency of the ceramics. Finally, high energy storage ( W rec = 3.01 J/cm 3 ) and high energy storage efficiency ( ƞ = 90 %) were achieved in the 0.7BNT-0.3CTT ceramics, and the breakdown field strength was increased to 350 kV/cm, with excellent discharge performance ( P D of 28.97 MW/cm 3 , t 0.9 of 1.9 μs). This study explores lead-free relaxor ferroelectric energy storage capacitors with high efficiency under high electric fields, providing a new approach to optimize the energy storage performance of ceramic energy storage devices.
研究领域:
材料科学
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能源存储
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电子工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Xuesong Hao,Xueying Liu,Yuhao Wang,Wenpeng Zang,Wenju Wu,Yingjie Jiang,Nanying Ning,Ming Tian,Liqun Zhang
In the quest for sustainable and renewable energy sources, researchers and engineers have explored innovative technologies to harvest energy from various environmental sources. Dielectric elastomer generators (DEGs) with high energy harvesting performance have been proven to be promising energy collectors, but achieving a high dielectric constant (ε’) and low electrical conductivity (EC) under high electric fields of dielectric elastomer (DE) simultaneously is a struggle, which poses significant challenges. In this study, high-content carboxyl group-grafted liquid polybutadiene (HCPB) is synthesized and then adopted as an organic dielectric filler to blend and cocross-link with a butadiene rubber (BR) matrix to prepare DE composites with high energy harvesting performance. The introduction of carboxyl groups enhances polarization while trapping free Al3+ in the matrix, which revolutionarily achieves a significant increase in ε’ under extremely low EC. Ultimately, the contradiction between increased ε’ and decreased EC under high electric fields is reconciled, resulting in a 30 HCPB/BR composite with high energy density (w = 91.9 mJ/cm3) and fine power conversion efficiency (PCE = 24.1%). This advancement paves the way for the development of HCPB/BR composite-based DEGs with enhanced ε’ and energy harvesting performance.
研究领域:
材料科学
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能源技术
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
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IF 19
Bin Zhang,Shuiting Hou,Jie Liu,Bo Tian,Zaicheng Nie,Kaixuan Nie,Zhu Mao,Dawei Wang,Pengfei Li,Xiaojie Lou
The increasing demand for high-power-density energy storage in advanced pulsed power systems necessitates polymer film capacitors exhibiting superior energy storage capabilities. Aromatic dielectric polymers, such as polyimide and polycarbonate, despite extensive research, exhibit a significant surge in conductivity loss under high electric fields due to their strong π – π stacking interactions. Herein, a novel norbornene polymer (PNB2APS) is prepared, and its strong π – π stacking interactions are effectively weakened through copolymerization with adamantylated norbornene (NBAd), thereby yielding a novel copolymer with ultrahigh breakdown strength (BDS) and enhanced discharge energy efficiency ( η ) under high electric fields, as demonstrated both experimentally and theoretically. A discharge energy density ( U d ) of 23.5 J cm −3 is achieved at 1000 MV m −1 , while maintaining U d = 15 J cm −3 even when η exceeded 90%, surpassing the energy storage performance of state-of-the-art commercial polymers. The film exhibits cost-effectiveness and facile processability, with high homogeneity and outstanding capacitance stability (>100 000 cycles), providing a practical pathway for scalable polymer dielectrics in high-performance electrical energy storage applications.
研究领域:
高分子材料科学
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介电物理
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能源存储
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电气工程
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功能材料
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纳米复合材料
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DOI
高影响因子
RSC Advances
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2015
·Vol. 6
·期 2
·1589-1599
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IF 3.84
Honghong Gong,Bei Miao,Xiao Zhang,Junyong Lu,Zhicheng Zhang
In an effort to achieve antiferroelectric-like behavior and high Ue under a high electric field, a series of poly(methyl methacrylate) (PMMA) grafted P(VDF-TrFE-CTFE) with increased PMMA content were synthesized via an atom transfer radical polymerization process. All the grafted copolymer films were prepared by a solution-casting process followed by uniaxially stretching with varied extension ratios. The dependence of crystalline, ferroelectric, dielectric and energy storage properties on both the orientation ratio and PMMA content was systematically discussed. Besides the orientation of the polymer chains in the amorphous phase together with the alignment of crystalline and ferroelectric grains, uniaxially drawing the films leads to an improvement in both the content and size of the crystalline and ferroelectric phases. Thanks to the strong confinement of rigid PMMA and the alignment induced high breakdown strength, the antiferroelectric-like behavior could be retained up to 675 MV m−1 with a discharged energy density of 23.3 J cm−3 in the copolymer bearing 24 wt% PMMA with an extension ratio of 300%. These results may help to deeply understand the ferroelectric transition mechanism of PVDF based ferroelectric polymers and provide a promising strategy for the design of polymers with high energy storage capability.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
Journal of Physical Chemistry C
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2023
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IF 3.7
Jize Wang,Ping Mu,Xiongzhuang Jiang,Shaowen cao,Bin Li,Yong Peng
In this study, we present a transparent perovskite-based photoanode consisting of a CsPbBr3-based photogenerated electric field layer and a Ni-Epoxy/Ni layer with integrated multifunctions of light transmission, sealing, charge conducting, and catalyzing. The Ni-Epoxy/Ni layer successfully constructed longitudinal charge transport channels and provided an interface with active sites, while achieving an average visible transmittance of more than 70%. For photoelectrochemical (PEC) water oxidation at 1.23 VRHE in 0.5 M KOH solution, the maximum photocurrent densities of the photoanode were 17.28 and 5.19 mA cm–2 when light was excited from the FTO and the multifunctional layer side, respectively, based on an actual working area of 2 cm2. The photoanode exhibited a 1450 mV shift of onset potential compared with the multifunctional layer. Due to the existence of a high built-in electric field, bias-free complete PEC water splitting was realized, and the peak photocurrent density was 0.46 mA cm–2. The multifunctional layer’s water resistance increased the photoanode’s working time from less than 1 min to more than 30 min.
研究领域:
材料科学
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光电化学
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太阳能转换
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DOI
高影响因子
危险品化学品经营许可证（带存储）