一个平衡屏蔽双策略,使稳定的阳极具有超低的界面阻抗
Qing Wen1,2,3, Taixu Hao1, Tian Chen1,2,3
1School of Metallurgy and Environment, Central South University Changsha 410083 China xhzhang@csu.edu.cn jczheng@csu.edu.cn.
Chemical science
|August 25, 2025
概括
使用和ZnF2的新型平面屏双策略有效地稳定水性离子电池中的阳极,防止树突和腐蚀,以增强能量存储. 这种方法显著提高了电池的寿命和性能.
科学领域:
- 电化学
- 材料科学
- 能量储存
背景情况:
- 水性离子电池 (AZIB) 显示出大规模储能的潜力.
- 在AZIB中严重的树突形成和腐蚀瘟疫阳极.
- 阳极上的不均的晶体平面和被动化层是这些问题的主要原因.
研究的目的:
- 开发一个对阳极均晶体平面和保护层的协同策略.
- 稳定阳极接口以提高AZIB的性能.
- 解决AZIB中树突和腐蚀的挑战.
主要方法:
- 采用了一种双重策略,包括一个低点的 (In) 层和一个外部的ZnF2屏蔽层.
- 印层作为一个平衡剂,促进均沉积.
- F2层提供了腐蚀抑制和加速的溶解.
主要成果:
- 对称的ZnF2@In@Zn电池表现出极低的界面阻抗 (<10 Ω) 和超过2800小时的循环寿命.
- 实现了低极化电压 (21.8 mV 在5 mA cm-2),比裸阳极 (75.8 mV) 显著改善.
- 在3Ag-1的10,000个循环后,全细胞 (ZnF2@In@Zn//NH4V4O10) 保持了79.5%的容量.
结论:
- 拟议的平衡屏蔽双策略有效地稳定了AZIB中的阳极.
- 这种方法减轻了树突的形成和腐蚀,提高了电化学性能.
- 该战略为开发用于储能应用的耐用和高性能金属阳极提供了有前途的途径.
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