Core-satellite ultra-small hybrid Ni@BT nanoparticles: A new route to enhanced energy storage capability of PVDF based nanocomposites

被引：49
作者：
Chen, Guanliang [1 ]
Lin, Xiujuan [1 ]
Li, Jianan [1 ]
Huang, Shifeng [1 ]
Cheng, Xin [1 ]
机构：
[1] Univ Jinan, Shandong Prov Key Lab Preparat & Measurement Bldg, Jinan 250022, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2020年 / 513卷
基金：
中国国家自然科学基金;
关键词：
Hybrid Ni@BT nanoparticles; Nanocomposites; Dielectric properties; Discharged energy density; POLY(VINYLIDENE FLUORIDE) NANOCOMPOSITES; HIGH DIELECTRIC-CONSTANT; POLYMER NANOCOMPOSITES; BREAKDOWN STRENGTH; DENSITY; COMPOSITES; PERFORMANCE; FABRICATION; NANOFIBERS; CAPACITORS;
D O I：
10.1016/j.apsusc.2020.145877
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Polymer-based composites comprising of high dielectric constant ceramic nanoparticles are widely used in dielectric capacitors due to their excellent energy storage and processing properties. In this study, ultra-small Ni nanoparticles were used to fabricate core-satellite structured hybrid Ni@BT nanoparticles. Compared with BT/PVDF composites, the Ni@BT/PVDF nanocomposites exhibited the enhanced energy storage properties due to the low electric conductivity, small dielectric loss and improved breakdown strength. The maximum discharged energy density reached 9.55 J/cm(3) for nanocomposites with 3 vol% Ni@BT at the electric field of 350 kV/mm, which was nearly eight times of commercial BOPP (1.2 J/cm(3) at 640 kV/mm) and was around 208% compared to the pristine PVDF (4.58 J/cm(3) at 340 kV/mm). The improved energy density of the nanocomposites could be attributed to the Coulomb-blockade effect of the introduced ultra-small Ni nanoparticles exactly. This work provides an effective approach to improve the energy storage property of dielectric nanocomposites.
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页数：10
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