原子级匹配的金属离子有机混合接口,以增强聚合物基复合电介质的能量存储
Xiaoxu Liu1, Dongyang Chen1, Jialong Li1
1School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|March 23, 2024
概括
研究人员为聚胺 (PI) 介电材料设计了一种新的金属离子有机混合接口 (MOHI). 这种接口显著提高了储能密度和效率,为先进的介电材料提供了有前途的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 纳米技术纳米技术
背景情况:
- 基于聚合物的复合介电材料对于储能应用至关重要.
- 提高介电材料的储能密度和效率仍然是一个重大挑战.
- 接口工程是克服传统复合介电物的局限性的关键.
研究的目的:
- 在聚胺 (PI) 和酸 (CNO) 纳米板之间设计和研究一种新的金属离子有机混合接口 (MOHI).
- 了解负责提高介电性能的接口机制.
- 为了实现基于PI的复合介电材料的高储能性能.
主要方法:
- 在聚胺和酸纳米板之间制造金属离子有机混合接口 (MOHI).
- 界面和介电性质的实验性表征.
- 理论计算以阐明接口粘合和电子结构.
主要成果:
- MOHI 实现了 CNO 纳米板和 PI 链之间的原子级匹配和强化学结合.
- MOHI有效地减少了自由体积,并引入了深度陷,抑制了电场扭曲.
- 在25°C达到9.42 J cm−3的能量储存密度,在150°C达到4.75 J cm−3的能量储存密度,效率为90%.
- 在各自的温度下,与纯PI相比,性能提高了2.6倍和11.6倍.
结论:
- 设计的MOHI显著提高了基于PI的复合电介质的储能性能.
- 接口工程方法为开发高性能介电材料提供了一种新策略.
- 这项研究为高能储能应用中先进的聚合物介电材料开辟了道路.
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