用非易燃电解质构建安全和高性能超级电容器的系统方法.
Hoai Van T Nguyen1, Kyung-Koo Lee1
1Department of Chemistry, Kunsan National University, Gunsan, Jeonbuk, 54150, Korea.
ChemSusChem
|July 24, 2023
概括
将辅助溶剂添加到三甲基酸盐 (TMP) 电解质中,可以提高超级电容器的性能和安全性. TMP-propionitrile混合物为先进的能量存储提供了改进的离子导电性,电容和能量密度.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 超级电容器需要安全的电解质用于大规模应用,不可燃性三甲基酸盐 (TMP) 是一个关键的选择.
- TMP电解质具有较低的离子导电性,限制功率密度和整体电化学性能.
- 安全性和电化学性质之间的平衡对于实用的超级电容器开发至关重要.
研究的目的:
- 提高超级电容器不可燃性三甲基酸盐 (TMP) 电解质的电化学性能.
- 研究辅溶剂对基于TMP的电解质的离子导电性,电容和能量密度的影响.
- 为了确定一个最佳的电解质组成,平衡安全和性能.
主要方法:
- 系统地研究基于TMP的电解质与各种辅溶剂 (碳酸,乙二,二).
- 物理和电化学性质的表征,包括离子导电,电容,能量密度和功率密度.
- 使用优化电解质配方的碳基超级电容器的性能评估.
主要成果:
- 与纯净的TMP相比,含有TMP和辅溶剂的二元电解质证明了较好的离子导电性,电容,功率密度和能量密度.
- 在70:30体积比的TMP-propionitrile (PN) 电解质表现出极好的离子导电性 (13.5mS cm−1).
- 使用优化的TMP-PN电解质的超级电容器实现了高容量 (24.0 F g-1),能量密度 (13.2 Wh kg-1),功率密度 (2.3 kW kg-1),工作电压为3.5 V.
结论:
- 添加辅溶剂有效地克服了TMP电解质中低离子导电性的局限性.
- 电解质TMP-PN为开发安全和高性能超级电容器提供了一个有前途的解决方案.
- 这项研究通过解决安全性和性能之间的权衡,促进了更安全的储能解决方案的开发.
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