材料科学
电介质
复合材料
纳米复合材料
化学工程
电容器
介电损耗
复合数
介电谱
超级电容器
作者
Yanan Yin,Jiacheng He,Chenggang Zhang,Jisi Chen,Jinxing Wu,Zhuqun Shi,Chuanxi Xiong,Quanling Yang
出处
期刊:Cellulose
[Springer Nature]
日期:2021-02-01
卷期号:28 (3): 1541-1553
标识
DOI:10.1007/s10570-020-03600-0
摘要
Flexible dielectric materials with high energy density and remarkable charge–discharge efficiency are currently in great demand for the field of energy storage. On the other hand, it is also urgent to develop renewable, biodegradable and environmentally friendly dielectric materials. In this work, Al2O3 nanoparticles (AO) with a diameter of ~ 10 nm were incorporated into regenerated cellulose matrix (RC) without extra treatment to fabricate environment-friendly RC–AO dielectric nanocomposites via a simple dissolution/regeneration pathway. Effects of Al2O3 nanoparticles on the structure and dielectric properties of RC–AO nanocomposite films were systemically investigated. The results showed that the RC–AO films exhibited excellent comprehensive performance, including increased dielectric constant, reduced dielectric loss, improved breakdown strength and high energy storage density. Particularly, the high energy density of 5.7 J cm−3 was achieved at the breakdown strength of 380 MV m−1 when the Al2O3 content was 5 wt%. Furthermore, the composites possessed excellent thermal conductivity, stability and mechanical property. This work provides a good choice for the development of high-performance and ‘green’ natural polymer-based dielectric materials.
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