通过PCBM在P(VDF-HFP) 复合材料中的诱导电子陷,以提高介电和储能性能
Yantao Yang1, Jingqi Qiao1, Haiyu Sun1
1State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China.
Polymers
|November 9, 2024
概括
将[6,6]-phenyl-C61-butyric acid甲基 (PCBM) 添加到聚乙烯化物-co-hexafluoropropylene (P(VDF-HFP)) 复合材料中,可以显著提高介电性能和储能. 这提高了先进应用的充电传输和能量密度.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 先进的能量存储需要具有优越介电性质的聚合物复合材料.
- 聚乙烯化物-co-hexafluoropropylene (P(VDF-HFP)) 是此类应用的关键聚合物矩阵.
- 提高介电性能对于提高储能能力至关重要.
研究的目的:
- 研究[6,6]--C61-酸甲基 (PCBM) 作为填充剂对P(VDF-HFP) 复合材料的介电和储能性能的影响.
- 为了最大限度地提高PCBM度,优化PCBM度.
- 了解PCBM影响电荷运输和能源储存的机制.
主要方法:
- 使用溶液造制备了具有不同度的PCBM复合膜.
- 介电,能量储存和电荷-放电特性被系统地描述.
- 进行了电荷陷引入和能量水平的分析.
主要成果:
- 除了PCBM外,还引入了具有1.25 eV能量水平的充电陷,调节了充电传输.
- 介电常数在0.2%电量PCBM时达到10.87的最大值.
- 断裂强度达到了455 MV/m,产生了7.38 J/cm3的能量密度 (33%的增长).
- 在300 MV/m时,充放电效率提高了66%.
结论:
- PCBM显著提高了P(VDF-HFP) 复合材料的介电常数,分解强度和能量密度.
- 通过PCBM引入充电陷在改善能源储存能力方面发挥了关键作用.
- 这些PCBM修改的P(VDF-HFP) 复合材料为灵活的储能器件中的高性能介电材料提供了一个有希望的途径.
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