Energy storage properties of P(VDF-TrFE-CTFE)-based composite dielectrics with uniform and gradient-doped boron nitride nanosheets

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IET Nanodielectrics Pub Date : 2021-05-25 DOI:10.1049/nde2.12024
Yanan Shang, Yu Feng, Changming Li, Changhai Zhang, Tiandong Zhang, Yongquan Zhang, Yue Zhang, Chunhui Song, Qingguo Chi
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引用次数: 11

Abstract

Dielectric capacitors play an important role in advanced electronic and power systems such as portable electronic devices, hybrid electric vehicles and electronic weapon systems, and the improvement of energy storage density will have a positive effect on reducing the volume and weight of equipment. Here, a series of single-layer dielectrics with boron nitride nanosheets (BNNSs) uniformly dispersed and multilayer dielectrics with BNNSs showing a positive gradient distribution (PGD) and inverse gradient distribution (IGD) in the poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) (P[VDF-TrFE-CTFE]) matrix were prepared by high-speed electrospinning and hot press technology. It is found that the best performance is observed inthe lowest interlayer gradient component in both PGD and IGD composite dielectrics. However, the performance of PGD is better than that of IGD, and the 3-5-3 multilayer dielectric in the positive gradient structure has the best electrical performance. Its maximum energy storage density of the 3-5-3 composite dielectrics is 12.93 J/cm3 at the applied electric field of 380 kV/mm. The above research results show that the gradient structure design plays an important role in optimising the breakdown strength and energy storage characteristics of composite dielectrics.

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均匀和梯度掺杂氮化硼纳米片的P(VDF‐TrFE‐CTFE)基复合电介质的储能性能
介质电容器在便携式电子设备、混合动力汽车和电子武器系统等先进的电子和电力系统中发挥着重要作用,储能密度的提高将对减少设备的体积和重量产生积极影响。在这里通过高速静电纺丝和热处理制备了一系列具有均匀分散的氮化硼纳米片(BNNSs)的单层电介质和具有BNNSs的多层电介质,BNNSs在聚偏二氟乙烯-三氟乙烯-氯三氟乙烯(P[VDF‐TrFE‐CTFE])基体中显示出正梯度分布(PGD)和反梯度分布(IGD)印刷技术。研究发现,在PGD和IGD复合电介质中,在最低的层间梯度分量中观察到最佳性能。然而,PGD的性能优于IGD,并且正梯度结构中的3‐5‐3多层电介质具有最佳的电学性能。在380 kV/mm的外加电场下,3‐5‐3复合电介质的最大储能密度为12.93 J/cm3。上述研究结果表明,梯度结构设计在优化复合电介质的击穿强度和储能特性方面发挥着重要作用。
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来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
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