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现场自聚合接口和局部化pH缓冲区的协同构建,用于高性能水性电池
Jiapei Li1, Zhiying Fang2, Hanjian Chen2
1Department of Materials Science and Engineering & Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong, 999077, P.R. China.
Angewandte Chemie (International ed. in English)
|August 28, 2025
概括
瓦莱洛 (VL) 通过形成保护层,有效地解决水性电池的挑战. 这种有机pH缓冲剂增强了电池的寿命和稳定性,使得无树和无穿的能量储存.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 水性 (Zn-I) 电池具有大规模储能的潜力.
- 关键的挑战包括树脂的生长,进化反应 (HER),腐蚀和聚酸穿效应,限制了实际应用.
研究的目的:
- 调查瓦莱洛 (VL) 作为有机pH缓冲剂,以减轻水性Zn-I2电池中的问题.
- 通过电解质工程提高Zn-I2电池的稳定性和性能.
主要方法:
- 对VL对电解质pH和电极表面的影响进行理论计算和实验验证.
- 在现场聚合VL形成固体电解质间相层 (SEI).
- 对称和完全Zn-I2电池的电化学性能测试.
主要成果:
- 维生素调节局部pH,形成一种保护性SEI层,抑制HER,腐蚀和树突的生长.
- VL修改了Zn2+溶解结构并破坏了结,提高了电化学性能.
- 基于VL的对称细胞在40 mA cm-2时表现出4000个循环,而全细胞达到26500个循环,容量保持率为86. 4%.
结论:
- 使用VL的有机pH缓冲是一种可行的策略,用于开发无树和无穿的Zn-I2电池.
- VL显著提高了水性Zn-I2储能系统的循环稳定性和整体性能.
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