JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 22
·1-12
·
IF 2.8
Liu Gang,Pu Zining,Xu Limeng,Yao Cheng,Zhang Changhai,Zhang Tiandong,Chi Qingguo
Conventional polymer film capacitors suffer from significant performance degradation at high temperatures due to increased conductivity loss. This study aims to enhance the high-temperature energy storage performance of polyetherimide (PEI) films by constructing a PZT/SiO 2 heterojunction composite dielectric structure. PEI films were prepared by solution casting and then modified by magnetron sputtering to deposit PZT and SiO 2 layers. At 150 °C, the composite films exhibited a high breakdown strength of 636.7 MV/m, a discharged energy density of 4.28 J/cm 3 , and a charge–discharge efficiency exceeding 90%. The PZT/SiO 2 heterojunction effectively inhibited charge injection, reducing leakage current and improving cyclic stability with minimal degradation after 50000 charge–discharge cycles. This scalable method offers a promising approach for developing high-performance polymer-based energy storage materials suitable for high-temperature applications.
研究领域:
材料科学
·
电气工程
·
高分子科学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 25
·45270-45278
·
IF 5.6
Xue Zhang,Chao Yin,Changhai Zhang,Xu Tong,Jianzeng Guo,Tiandong Zhang,Xubin Wang,Qingguo Chi
Dielectric film capacitors, with remarkable high-power densities, charge-discharge speed, and thermal stability, are promising candidates in advanced power electronics technology. However, the capacitor films still face bottleneck problems of low energy storage density and high energy loss. This study presents a novel modification method designed to synergistically enhance both the breakdown strength and polarization properties of barium carbonate (BaTiO 3 , BTO)-based composite films through Zr 4+ doping and sodium bismuth titanate (Na 0.5 Bi 0.5 TiO 3 , NBT) solid-solution modification. The 0.94BaZr 0.2 Ti 0.8 O 3 -0.06NBT composite films synthesized on Pt/Ti/SiO 2 /Si substrates by sol-gel method exhibit exceptional energy storage performance. Notably, the composite films achieve an impressive recoverable energy density ( W rec ) of 62.08 J/cm 3 and a high charge-discharge efficiency( ղ ) of 85.18 % at the electric field of 6117 kV/cm. The promising results highlight the tremendous potential of the modified BTO-based composite films for transformative applications in advanced energy storage systems.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·Vol. 13
·期 27
·13952-13961
·
IF 5.1
Xin Zhen,Jian Wang,Xinhui Li,Yanda Jiang,Zhi Li,Zhonghui Shen,Xin Zhang
The pursuit of high-temperature dielectric polymers with superior energy density is a critical objective in the development of advanced electronic and electrical systems. However, existing polymers capable of operating at elevated temperatures often suffer from a low dielectric constant and excessive conduction loss. Herein, we present an all-polymer composite with exceptional high-temperature energy storage performance, wherein polyvinylidene fluoride (PVDF) nanofibers are precisely aligned within a polyetherimide (PEI) matrix. The PEI/PVDF composites exhibit an enhanced dielectric constant compared to PEI due to the intrinsically higher dielectric constant of the PVDF component and interface effects between PEI and PVDF components. Moreover, the alignment of PVDF nanofibers achieves a perpendicular orientation to the applied electric field, contributing to enhanced breakdown strength. The resultant PEI/PVDF composites with optimized content and diameter of PVDF nanofibers in the PEI matrix achieve a discharge energy density of 9.39 J cm−3 at 150 °C with the energy efficiency (η) exceeding 90%. This research presents a simple, economical, and scalable method for producing dielectric polymer films with excellent energy storage capacity at high temperatures.
研究领域:
材料科学
·
储能技术
·
聚合物工程
·
介电与绝缘
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 40
·期 11
·1441-1450
·
IF 3.815
Tong Li-Fen,He Liang,Zhan Chen-Hao,Xia Yun-Qing,Liu Xiao-Bo
High-quality film capacitors are widely used in many fields such as new energy vehicles, electronic communications, etc., due to their advantages in wide frequency response and low dielectric loss. The dielectric film is a crucial part of the film capacitor, and its properties have an important impact on the performance and use conditions of the film capacitor. In this work, a novel high-temperature-resistant dielectric film was prepared. Firstly, the Bi 2 S 3 /rGO-CN fillers were prepared by hydrothermal method combined with cyanation treatment, and then added to the poly(arylene ether nitrile) (PEN) matrix to prepare the dielectric film materials (PEN/Bi 2 S 3 /rGO-CN). After high temperature treatment, the fillers Bi 2 S 3 /rGO-CN reacted with the PEN matrix, and the composites materials transformed into a thermosetting hybrid film (PEN-Bi 2 S 3 /rGO) with gel content of 97.88%. The prepared hybrid dielectric films did not decompose significantly before 400 °C, and showed a glass transition temperature ( T g ) of up to 252.4 °C, which could increase the effective use temperature of the materials. Compared with the composite films without heat treatment, they exhibit better mechanical properties, with further improvement in tensile strength and elastic modulus, and a decrease in elongation at break. The dielectric constant of the hybrid films can be up to 6.8 while the dielectric loss is only about 0.02 at 1 kHz. Moreover, the hybrid films showed excellent dielectric stability during temperature changes, and remain relatively stable before 250 °C, which is suitable as a high-temperature-resistant high-dielectric material and is more advantageous for practical applications.
研究领域:
材料科学
·
电气工程
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Yang Zhang,Zhiyu Liu,Xianlong Zhang,Shaoyun Guo
With the high-frequency development of high-speed communication electronic devices, excellently adhesive materials with low dielectric constant and ultralow dielectric loss have been highlighted. However, intrinsically strong adhesive materials (e.g., epoxy) with numerous polar functional groups disappointingly deteriorate their high-frequency dielectric properties. Herein, a double cross-linked network of maleic-anhydride polybutadiene–amino-terminated polyimide oligomers (MAPB-PIO) is synthesized, and then a novel sandwich-layered dielectric film (MAPB-PIO/polytetrafluoroethylene (PTFE)/MAPB-PIO) is prepared through double-sided coating. The MAPB-PIO/PTFE/MAPB-PIO film exhibits low dielectric constant (Dk = 1.9929) and ultralow dielectric loss (Df = 0.0012) at 10 GHz. Meanwhile, the interface peel strength reaches 0.912 N/mm. Additionally, the MAPB-PIO/PTFE/MAPB-PIO film is successfully applied to manufacture a flexible printed circuit board (PCB) and shows an outstanding high-frequency signal transmission capability; i.e., signal loss is 26.45 dB at 18 GHz, which is only 43% of the commercially available epoxy resin PCB. All results indicate that the flexible MAPB-PIO/PTFE/MAPB-PIO film is highly promising for applications in next-generation flexible electronics and radiofrequency devices, especially in the millimeter wave field.
研究领域:
材料科学
·
电气工程
·
高频通信
·
柔性电子
✓ 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）