材料科学
电介质
氮化硼
纳米复合材料
三元运算
复合材料
复合数
化学工程
介电损耗
高-κ电介质
铜
光电子学
冶金
计算机科学
工程类
程序设计语言
作者
Xue–Qian Li,Jinyu Wang,Huan Chen,Chuanxi Xiong,Zhuqun Shi,Quanling Yang
标识
DOI:10.1016/j.compositesa.2021.106554
摘要
The increasing environmental pollution produced by synthetic polymer stimulates a huge demand for new biodegradable dielectric materials stemming from bioresources. Herein, regenerated chitin (RCH)/boron nitride nanosheets (BNNS)/copper calcium titanate nanofiber (CCTO) composite films were fabricated by simple mixing in aqueous KOH/urea solution. The two-dimensional BNNS possess wide bandgap and excellent intrinsic insulating properties to reduce the dielectric loss, thus exhibiting a greatly enhanced breakdown strength. Simultaneously, CCTO with ultrahigh dielectric constant significantly improved the dielectric constant of these ternary composite films. Accordingly, an extremely high energy storage density of 9.27 J cm−3 was obtained when loaded with 6 wt% BNNS and 5 wt% CCTO. Moreover, a superhigh charge-discharge efficiency of about 80% was well-maintained even when the applied electric field reaches 440 MV m−1. Furthermore, the ternary composite films also possessed much better thermal and mechanical properties.
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