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离子潜力驱动的界面pH控制使中性气电池的高阳极利用成为可能
Ming Li1, Haotian Chen1, Sha Luo1
1School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China.
ACS applied materials & interfaces
|June 16, 2025
概括
用于水性空气电池 (AAB) 的新型中性电解质使用离子电位 (φ) 来防止阳极腐蚀和被动化. 这种设计显著提高了电池的性能和寿命,提供了可持续的能源解决方案.
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
- 可持续能源 可持续能源
背景情况:
- 水性空气电池 (AAB) 是一个有前途的可持续能源.
- 挑战包括性中阳极腐蚀和中性电解质中的被动化.
研究的目的:
- 为AAB设计一种新的中性电解质,可以克服阳极腐蚀和被动化.
- 为金属空气电池电解质建立以离子电位 (φ) 为指导的设计原则.
主要方法:
- 开发一个NH4Cl/MnCl2中性电解质与调节的水解平衡.
- 在现场进行pH监测和全面的特征分析.
- 电化学阻抗光谱 (EIS) 和斯瓦格洛克型细胞测试.
主要成果:
- NH4Cl/MnCl2电解质保持了界面pH值在4.1和4.4之间,抑制了Al(OH) 3被动化和进化.
- 实现了0.97 V的高输出电压和超过84.5%的阳极利用效率 (2516.5 mAh g-1).
- 在Swagelok型电池 (>30 mAh cm-2) 和成型电池 (>94%的阳极利用率) 中表现出高放电能力.
结论:
- 离子电位 (φ) 引导的电解质设计为金属空气电池提供了一个通用原则.
- 这种方法通过热力学调节有效平衡腐蚀抑制和激活动力学.
- 该研究在开发稳定和高性能水性空气电池方面取得了重大进展.
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