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自吸附电解质添加剂促进Zn(002) 在水性离子电池的Zn阳极上的沉积
Junting Chen1, Shuai Bai2, Xiangxin Zhang3
1College of Chemistry, Fuzhou University, Fuzhou 350108, PR China; Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, PR China.
Journal of colloid and interface science
|May 17, 2025
概括
在水性离子电池电解质中添加7-,2,3-二 propyl) theophylline (DHTP) 可以提高阳极的稳定性. 这种功能添加剂抑制了树的生长和腐蚀,使电池寿命更长.
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 (AZIBs) 由于树脂的生长和阳极腐蚀,其循环稳定性较差.
- 这些问题大大限制了AZIBs的实际应用.
研究的目的:
- 引入7-(2,3-二基) 理论 (DHTP) 作为电解质添加剂,以增强AZIB中阳极的稳定性.
- 研究DHTP调节阳极-电解质接口并减轻副作用的机制.
主要方法:
- 使用了理论计算 (例如吸附能) 和实验性表征.
- 组装了对称Zn生物和Zn细胞和全细胞 (Zn生物NaV3O8·1.5H2O),并在各种条件下进行了测试.
主要成果:
- DHTP优先吸附在阳极上,减少与水的接触,抑制的演变和腐蚀.
- 在Zn(002) 平面上的DHTP吸附优化了Zn2+的扩散和沉积,促进了优先的Zn(002) 平面生长.
- 用DHTP循环的对称Zn单元稳定循环超过800小时; 用Zn单元NaV3O8·1.5H2O的完整单元实现了9000个循环,在10 A g-1时保持89%的容量.
结论:
- 通过分子吸附,DHTP有效地通过控制界面反应来稳定阳极.
- 这一战略为开发高度可逆的阳极用于先进的AZIB提供了一个有希望的方法.
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