基于质子凝的超级电容器具有快速低温自愈特性
Qin Zhang1, Hui Wang1, Shuang Chen1
1Polymeric and Soft Materials Laboratory, School of Chemistry and Life Science and Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China.
ACS applied materials & interfaces
|July 30, 2024
概括
这项研究引入了超级电容器的新型水凝电解质,使得高导电性和快速自我愈合,即使在零度以下的温度. 这一突破提高了在极端条件下灵活储能设备的性能和耐用性.
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:
- 基于水凝的超级电容器为安全,便携式的能量存储提供了潜力.
- 低温温度限制了水凝电解质导电能力和自我愈合,这是由于聚合物链运动和键重建受到限制.
研究的目的:
- 为超级电容器开发一种高导电性,自我修复的水凝电解质,在广泛的温度范围内有效运行,包括零下条件.
- 解决当前水凝电解质在低温性能和耐用性方面的局限性.
主要方法:
- 一种聚烯胺-植物酸 (PAAm-PA) 水凝电解质的合成.
- 离子导电性,自我愈合效率和粘附性质的表征.
- 在各种温度下制造和测试基于水凝的集成超级电容器.
主要成果:
- 通过Grotthuss机制,PAAm-PA水凝表现出高的离子导电性 (102.0 mS cm-1).
- 水凝表现出快速的自我愈合 (在-20°C下效率为79.4%) 和出色的粘合性.
- 超级电容器在25°C时达到139.5mF cm-2的特定电容,并在-20°C的自我修复周期后保持92.1%的电容.
- 设备显示出了显著的稳定性,在 -20 °C 5000 个循环后,容量降解仅为 6.4%.
结论:
- 开发的PAAm-PA水凝电解质使得高性能,自愈的超级电容器能够在零度以下的温度下发挥作用.
- 这项研究为创建适用于极端环境的强大,灵活的储能解决方案提供了可行的途径.
- 该研究强调了植物酸在设计用于能源应用的先进水凝电解质方面的潜力.
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