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通过微量双电解质添加剂调节的动态分子间相,用于超长寿命和无树突的金属阳极
Hong-Bo Chen1, Huan Meng1, Tong-Rui Zhang1
1Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, School of Materials Science and Engineering, Jilin University, Changchun, 130022, China.
Angewandte Chemie (International ed. in English)
|March 11, 2024
概括
微量双电解质添加剂D-曼诺和二硫酸盐使得可充电水性多价值金属离子电池的无树脂,超长寿命的阳极成为可能. 这一突破提高了电池的稳定性和性能.
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
- 电池技术 电池技术
背景情况:
- 金属是水性多价值金属离子电池的一个有前途的阳极,因为它的高容量和低成本.
- 实际应用受到树突生长和阳极/电解质接口上的寄生性副作用的阻碍.
研究的目的:
- 使用双电解质添加剂开发一种具有超长寿命的无树脂阳极.
- 为了研究动态分子界面的机制,以改善沉积和减少副作用.
主要方法:
- 作为双电解质添加剂,使用了微量D-曼诺斯和二硫酸盐.
- 在电场涂层/脱落下,研究了添加剂在表面的动态吸附/脱落行为.
- 评估了修改后的阳极在树突形成,库伦比克效率和循环稳定性方面的性能.
主要成果:
- 双添加剂形成了动态的分子界面,促进了均的核和沉积.
- 在1 mA cm-2.2下,在6400小时以上的时间内实现了高度可逆和无树的剥离/.
- 经过2000多个循环,ZnxMnO2全细胞的长期循环稳定性得到证明.
结论:
- 微量双电解质添加剂有效抑制了树的生长和副作用.
- 动态分子界面对于实现稳定和高效的阳极至关重要.
- 这种方法为开发高性能,持久的水性多价值金属离子电池提供了可行的策略.
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