在核心-双结构的聚乙胺纳米复合材料中实现优异的介电和储能性能
You Yuan1, Jingyu Lin1, Xinhua Wang1
1Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), School of Material Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
Polymers
|July 29, 2023
概括
这项研究介绍了一种新的核心双纳米复合材料,用于先进的介电应用. 该材料显示了增强的能量储存密度和电荷-放电效率,这对于脉冲动力和电力传输系统至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 电气工程 电气工程
背景情况:
- 脉冲动力和电力传输系统需要先进的介电材料.
- 现有的材料往往缺乏高温耐用性,储能密度和高效的充放电性能.
研究的目的:
- 开发一种新的核心-双结构纳米复合材料,以提高介电和储能性能.
- 在高性能应用中研究铁 (II,III) 氧化物@酸@二氧化/聚乙胺 (Fe3O4@BaTiO3@SiO2/PEI) 的结构性质关系.
主要方法:
- 一个核心-双结构的Fe3O4@BaTiO3@SiO2纳米粒子的合成.
- 制造具有不同填充物含量的Fe3O4@BaTiO3@SiO2/PEI纳米复合材料.
- 介电性质,能量密度和电荷-放电效率的表征.
主要成果:
- Fe3O4@BaTiO3@SiO2/PEI纳米复合材料 (9%重量填充剂) 实现了电介常数10.6和0.017的低电介损耗.
- 获得了5.82 J cm-3的高能量密度和72%的充放电效率 (η).
- 核心双结构有效地增强了极化,并阻碍了电荷转移,提高了整体性能.
结论:
- 设计的核心双纳米粒子及其基于PEI的纳米复合材料显著提高了介电和储能性能.
- 这项研究为开发用于电子设备和能源存储的高性能介电材料提供了新的见解.
- 这些发现对推进脉冲动力和电力传输技术具有重大意义.
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