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链链协同的水凝电解质调节离子溶解,用于稳定阳极和高操作电压的灵活离子混合电容器
Hang Zhang1,2,3, Li Wan1, Ziran You1
1College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, 300457, P.R. China.
Angewandte Chemie (International ed. in English)
|May 29, 2025
概括
一种新的水凝电解质稳定了阳极,并扩大了柔性水性离子混合电容器 (ZIHC) 的电化学稳定性窗口,提高了能量密度和设备性能.
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:
- 水性离子混合电容器 (ZIHCs) 提供高能量密度,但面临着水诱导的副作用反应和树生长的挑战.
- 优化水凝电解质/电极接口对于灵活ZIHC的稳定性和性能至关重要.
研究的目的:
- 为灵活的ZIHCs开发一种新的水凝电解质,以解决阳极的不稳定性并扩大电化学稳定性窗口.
- 通过增强的电解质-电极相互作用,提高灵活ZIHC的能量密度和运行电压.
主要方法:
- 一种半透网络水凝电解质,P(AM-SBMA) /凝 (PSG),是使用烯胺 (AM) 和一个zwitterionic化合物 (SBMA) 合成的.
- 研究了水凝调节离子溶解和稳定阳极表面化学的能力.
- 评估了电化学性能,包括电化学稳定窗口 (ESW) 和涂/脱落可逆性.
主要成果:
- PSG-5水凝电解质将灵活ZIHC的ESW扩展到2.45V.
- 达到0.87的高Zn2+转移数和高度可逆的涂/脱落.
- 灵活的ZIHC表现出2.2V的高工作电压和117Wh kg-1的能量密度,在293W kg-1时.
结论:
- 开发的P ((AM-SBMA) /凝水凝电解质有效地稳定了阳极并扩大了灵活ZIHC中的ESW.
- 这种方法提供了一个有前途的战略,用于创建高效和稳定的灵活ZIHC,并增强储能能力.
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