材料科学
复合数
电介质
储能
聚合物
离子
金属
接口(物质)
纳米技术
化学工程
光电子学
复合材料
有机化学
冶金
功率(物理)
化学
物理
量子力学
毛细管数
毛细管作用
工程类
作者
Xiaoxu Liu,Dongyang Chen,Jialong Li,Shao‐Long Zhong,Yu Feng,Yue Dong,Dawei Sheng,Haonan Chen,Xiaodong Hao,Zhi‐Min Dang
标识
DOI:10.1002/adma.202402239
摘要
Abstract In this work, a distinctive “metal‐ion organic hybrid interface” (MOHI) between polyimide (PI) and calcium niobate (CNO) nanosheets was designed. The metal ions in the MOHI could achieve atomic‐level matching not only with the inorganic CNO but also with the PI chains, forming uniform and strong chemical bonds. These results were demonstrated by experiment and theory calculations. Significantly, the MOHI reduced the free volume and introduced deep traps across the filler‐matrix interfacial area, thus suppressing the electric field distortion in PI‐based composite dielectrics. Consequently, PI‐based dielectric containing the MOHI exhibited excellent energy storage performance. The energy storage densities ( U e ) of the composite dielectric reached 9.42 J cm −3 and 4.75 J cm −3 with energy storage efficiency ( η ) of 90% at 25 °C and 150 °C respectively, which are 2.6 and 11.6 times higher than those of pure PI. This study provides new ideas for polymer‐based composite dielectrics in high energy storage. This article is protected by copyright. All rights reserved
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