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工程水性电解质与邻近的S基有机添加剂,用于高度可逆的离子电池
Teng Li1,2, Ahmad Naveed1, Jiongzhi Zheng3,4
1School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
Angewandte Chemie (International ed. in English)
|March 14, 2025
概括
这项研究引入了3,3'-dithiobis-1-propanesulfonic酸二盐 (SPS) 作为水性离子电池 (AZIB) 的电解质添加剂. SPS促进了均的沉积,通过减轻树突和腐蚀来提高电池的稳定性和性能.
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:
- 水性离子电池 (AZIB) 面临着诸如树石形成,演化反应 (HER) 和腐蚀等挑战,阻碍了商业化.
- 传统的电解质添加剂通常会促进不利的 (002) 沉积,导致结构不稳定.
研究的目的:
- 为了解决AZIBs的局限性,引入了一种新的电解质添加剂,即3,3-dithiobis-1-propanesulfonic酸二盐 (SPS).
- 调查SPS增强阳极稳定性和电池性能的机制.
主要方法:
- 在AZIB中,SPS是一种对称的硫基有机盐,被用作电解质添加剂.
- 分析了SPS修饰的阳极的吸附行为和电化学性能.
- 组装和测试了/NaV3O8·1.35H2O全细胞,以评估长期循环稳定性和容量保留.
主要成果:
- 通过独特的吸附网络,SPS促进了密集 (100) 的生长,确保了沉积物的结构均性和紧性.
- 该添加剂通过阻断电解质获取并促进Zn2+运输和溶解,有效地减轻了HER和腐蚀.
- 在5 mA cm-2,5 mAh cm-2下持续循环超过1100小时,在15 mA cm-2,15 mAh cm-2下稳定运行,达到99.41%的库伦比效率.
- 使用SPS添加剂的Zn/NaV3O8·1.35H2O电池表现出极好的循环稳定性和95.5%的容量保留.
结论:
- 酸作为双作用添加剂,通过控制沉积和减轻寄生反应来改善阳极的稳定性.
- 这些发现为开发高性能和耐用的AZIB和其他基于金属的电池系统提供了宝贵的见解.
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