稀土合金阳极的自发颗粒精炼效应使稳定的电池成为可能

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Manjing Chen¹, Yuxiang Gong¹, Yunxiang Zhao²

¹School of Materials Science & Engineering, Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional Materials, Central South University, Changsha 410083, China.

National science review

|July 29, 2024

概括

将 (Ce) 添加到 (Zn) 阳极中,通过提炼颗粒并防止有害的接口反应,可以提高电池的稳定性. 这提高了Zn金属电池的性能和寿命,用于实际储能.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

阳极的界面反应限制了金属电池的稳定性和寿命.
了解阳极的微观结构对于改善和剥离行为至关重要.

研究的目的:

通过加入 (Ce) 来改造商业薄膜,以提高阳极稳定性和可逆性.
为了研究结合对核化,粒度结构和界面反应的影响.

主要方法:

商业Zn片的电子沉积与Ce元素使用"钉钉效应".
分析在粒边界 (GBs) 的Ce原子分离及其对Zn电子配置的影响.
评估Zn/剥离行为在对称细胞和袋细胞与高面积负载阴极.

主要成果:

这一结合重组了Zn电子配置,增加了活性位点,并通过复合核化模型促进了统一的Zn核化.
这些元素增强了GB的稳定性,减轻了寄生反应,并导致了自发的谷物提炼.
改造后的ZnCe电极显示了高度可逆的Zn涂层/剥离 (4.0 Ah cm-2在4000小时内) 和在袋式电池中稳定的循环 (83%容量保留在110个循环中).

结论:

使用Ce结合的谷物精炼策略有效地提高了Zn金属阳极的稳定性和寿命.
这种方法为设计先进的可充电电池的无树脂金属阳极提供了洞察力.
这项研究突出了操纵阳极微观结构的潜力,用于高性能能量存储设备.

关键词:

GB GB 稳定性的稳定性谷物提炼谷物提炼稀土是一种稀土.金属电池金属电池

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