通过易斯酸对阳离子和水分子的同时操纵,以获得高度稳定的 Zn 阳极
Rui Wang1, Jiacai Zhu1, Min Yang1
1Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), State Key Laboratory of Advanced Chemical Power Sources, College of Chemistry, Nankai University, Tianjin, 300071, P.R. China.
Angewandte Chemie (International ed. in English)
|March 18, 2025
概括
添加到电解质的化会抑制水性离子电池中的树突和演变. 这提高了阳极的可逆性和电池循环性能.
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 (ZIB) 在常规电解质中面临阳极树突形成和演化反应 (HER) 的挑战.
- 这些问题限制了ZIB的稳定性和业绩.
研究的目的:
- 在传统的电解质中引入化,以减轻 Zn 树突的生长,并在 Zn 阳极上抑制 HER.
- 为了提高ZIB的性能和循环稳定性.
主要方法:
- 拥有易斯酸函数组 (Si-O-Si和Si-OH) 的化被纳入水性电解质中.
- 研究了蒸二氧化功能组,硫酸盐离子和水分子之间的相互作用.
- 评估了 Zn 阳极和 Zn 基底MnO2 充满电池的电化学性能.
主要成果:
- 吸烟的二氧化显著增加了Zn2+离子转移数,这是由于易斯酸与SO42-离子的相互作用,促进了均的Zn沉积.
- Si─OH 组有效地限制了水分子,抑制了进化反应 (HER).
- 含有二氧化的电解质中的 Zn 阳极表现出高的可逆性,而 Zn MnO2 充电池表现出优越的循环性能.
结论:
- 化二氧化作为ZIB中的水性电解质的有效添加剂.
- 烟二氧化的双重功能组成功地解决了 Zn 树突形成和 HER 的问题.
- 这一策略可以提高ZIB的电化学稳定性和循环寿命.
相关概念视频
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