材料科学
电容器
电介质
复合材料
铁电性
电场
聚合物
图层(电子)
铁电聚合物
功率密度
光电子学
电压
电气工程
功率(物理)
工程类
物理
量子力学
作者
Shengbiao Sun,Zhicheng Shi,Liang Sun,Liang Liang,Davoud Dastan,Benlin He,Huanlei Wang,Minghua Huang,Runhua Fan
标识
DOI:10.1021/acsami.1c08063
摘要
Dielectric polymer capacitors are extensively applied in advanced electronics by virtue of their extremely high power density. However, it remains a challenge to concurrently realize high energy density and high discharge efficiency. In order to solve this conundrum, we herein design a novel all-polymer trilayer structure, where the paraelectric poly(methyl methacrylate) (PMMA) is used as the top layer to obtain a high discharge efficiency, and ferroelectric P(VDF-HFP) is employed as the bottom layer to obtain a high energy density. Particularly, the PMMA/poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) blend composite is used as the middle layer to homogenize the electric field inside the trilayer composites, turning out an obviously boosted breakdown strength and elevated energy density. Consequently, an efficiency as high as 85% and an energy density up to 7.5 J/cm3 along with excellent cycling stability are simultaneously realized at an ultrahigh electric field of 490 kV/mm. These attractive characteristics of the all-polymer trilayer structure suggest that the feasible pathway presented herein is significant to realize concurrently a high energy density and discharge efficiency.
科研通智能强力驱动
Strongly Powered by AbleSci AI