在电解质中微观水平的阳离子和稀释剂化学,用于在高压和低温下运行的水性超级电容器
Yingbin Liu1, Chang Yu1, Shuqin Lan1
1State Key Lab of Fine Chemicals, School of Chemical Engineering, Liaoning Key Lab for Energy Materials and Chemical Engineering, Dalian University of Technology, Dalian, 116024, China.
Advanced materials (Deerfield Beach, Fla.)
|June 18, 2025
概括
一种使用甲和乙的新型混合电解质增强了水性超级电容器,用于稳定的高压和低温能量存储. 这种进步可以在广泛的温度范围内提高性能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性超级电容器是安全,绿色,高功率的储能设备,具有广泛的应用潜力.
- 稳定的高压和低温运行需要超越传统配方的先进电解质.
研究的目的:
- 开发一种混合电解质,用于稳定的高压和低温水性超级电容器运行.
- 为了研究增强电化学稳定性和离子导电性的机制.
主要方法:
- 混合化8m Ca(ClO4) 2/H2O与乙二 (AN) 作为稀释剂.
- 电化学表征以确定电化学稳定性窗口和离子导电性.
- 对离子-分子相互作用和溶解结构的分析.
主要成果:
- 开发了一种混合电解质,具有3.29V的电化学稳定性窗口和1.5mS cm-1的离子导电性,温度为-50°C.
- 由于减少的Ca2+-ClO4-集群,在-50°C处表现出抑制的盐沉.
- 实现了具有高电压 (2.3V) 的对称超级电容器,优异的速率能力,以及从25到-50°C的长期循环稳定性.
结论:
- 混合的Ca ((ClO4) 2 / H2O-AN电解质使稳定,宽温度的水性超级电容器成为可能.
- 乙二在增强电化学稳定性,离子导电性和低温性能方面发挥着关键作用.
- 这项工作为开发先进的安全和绿色能源存储解决方案提供了一个有希望的途径.
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