Achieving High Dielectric Constant, High Breakdown Strength, and High Efficiency in a Linear Polymethyl Methacrylate Composite for Energy Storage

材料科学 电介质 复合材料 电容器 复合数 高-κ电介质 聚合物 储能 能量密度 聚甲基丙烯酸甲酯 电压 光电子学 电气工程 工程物理 功率(物理) 工程类 物理 量子力学
作者
Yujiu Zhou,Hu Ye,H. J. Feng,Jiali Wu,Tao Chen,Qifeng Pan,Yuetao Zhao,Jianhua Xu
出处
期刊:Lecture notes in electrical engineering 卷期号:: 513-521
标识
DOI:10.1007/978-981-99-3408-9_44
摘要

Electrostatic capacitors are widely used due to their relatively high voltage, high power density, and high reliability. However, its energy density is very low and unable to meet the growing demand. Moreover, it is usually difficult for a single material to satisfy high dielectric constant, high breakdown strength, and high efficiency simultaneously. Herein, we reported an all-organic composite by using linear polymethyl methacrylate (PMMA) as the matrix. The film was fabricated through a scalable solution casting method for industrial application. Due to good compatibility between the PMMA matrix and poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)), the composite exhibit improved high dielectric constant, enhanced breakdown strength, and maintain excellent energy storage efficiency. After introducing a proper proportion of ferroelectric P(VDF-HFP), a high energy density of 4.43 J/cm3 could be reached, while that of pristine PMMA is only 1.82 J/cm3. Moreover, the efficiency of P-15 is still maintained at 83.4% even under 4500 kV/cm, and the decline of efficiency is very low (5.3% from 500 kV/cm to 4500 kV/cm). This work provides a case to enhance the energy density of PMMA based all-organic polymer composite.
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