通过使用单层疏水碳点的动态接口工程来提高阳极的可逆性
Hanmiao Yang1,2, Kaiyue Zhu1,2, Weili Xie1,2
1State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
ACS nano
|January 2, 2025
概括
疏水性碳点在阳极上形成了一层保护层,通过防止树突形成和副作用,提高水性离子电池的寿命和稳定性.
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) 为电网存储提供了低成本和安全的替代方案.
- 由树突形成和水诱导的副作用引起的阳极可逆性差,限制了AZIB的实际应用.
研究的目的:
- 为了提高AZIB中阳极的可逆性和稳定性.
- 为了抑制水诱导的副作用反应和在电极/电解质接口的树突形成.
主要方法:
- 在电极/电解质接口上动态构建一单层疏水性碳点 (CD).
- 在电解质中使用微量疏水性CD来修改电双层 (EDL) 结构.
- 研究离子合过程中的界面行为.
主要成果:
- 疏水性CD单层重建了有利的EDL结构,抑制了副作用反应并促进了离子溶解.
- 在化过程中保持了动态接口的完整性,防止了树的生长.
- Zn对称细胞的寿命在10 mA cm-2下延长至2400小时,在30 mA cm-2下延长至600小时.
- 完整的细胞 (硬币和袋类型) 呈现出特殊的稳定性.
结论:
- 动态单层保护接口策略对可逆金属阳极有效.
- 疏水型CD为克服水性离子电池技术的关键挑战提供了一个有希望的方法.
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