在纤维素衍生的凝聚合物电解质中的多离子) 液体增强离子动力学.
Tiago G Paiva1,2, Maykel Klem1,3, Sara L Silvestre1
1I3N, Cenimat, Department of Materials Science (DCM), NOVA School of Science and Technology, NOVA University of Lisbon, Caparica, 2829-516, Portugal.
ChemSusChem
|November 6, 2024
概括
基于纤维素的凝聚合物电解质与离子液体显示出储能的前景. 阳离子聚合物改善了离子运输,实现了类似于微型超级电容器液体电解质的转移数.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物科学 聚合物科学
背景情况:
- 凝聚合物电解质 (GPEs) 通过结合固体和液体特性,比传统电解质提供优势.
- 基于纤维素的材料是丰富的,环保的,适合开发先进的GPE.
研究的目的:
- 开发基于纤维素的GPE,使用甲基纤维素和各种离子液体剂.
- 研究不同剂对GPEs离子动力学和分子相互作用的影响.
- 为了评估这些GPE在微型超级电容器设备中的性能.
主要方法:
- 使用甲基纤维素,离子液体 ([Pyr14][TFSI]),聚合物离子液体 ([PDADMA][TFSI]) 和离子聚合物离子液体 (LiP[STFSI]) 合成的GPE.
- 通过减弱总反射度里埃转换红外光谱学 (ATR-FTIR),异核重置增强光谱学 (HOESY) 和脉冲场梯度核磁共振扩散 (PFG-NMR) 进行表征.
- 计算Li+转移数 (tLi+) 的方法.
主要成果:
- 包括缓慢扩散的聚合物离子液体和快速扩散的盐的GPE实现了高的Li+转移数.
- 阳离子聚合物离子液 (LiP[STFSI]) 显著增强了离子运输,产生与液体电解质相比的转移数.
- 使用这些GPE制造的微型超级电容器 (MSC) 显示出电容性行为.
结论:
- 聚合物剂的性质极大地影响了GPE中的离子运输.
- 优化的GPE显示了提高可持续能源存储系统性能的潜力.
- 进一步开发GPE成分可以提高微型超级电容器等应用的效率.
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