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可充电固态纳米金属电池在-20°C下工作

Haibo Jin^1,2, Xiong Xiao¹, Lai Chen²

¹Beijing Institute of Technology, School of Materials Science and Engineering, Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Beijing Key Laboratory of Environmental Science and Engineering, Beijing, 100081, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|July 24, 2023

概括

这项研究介绍了一种固态金属电池 (SSNMB),该电池在结温度下有效运行. 新的电池设计采用纳西康固体电解质,在广泛的温度范围内提供稳定的金属阳极性能.

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:

固态金属电池 (SSNMB) 面临着金属阳极稳定性的挑战,特别是在低温下.
现有的无机固体电解质 (SE) 在结条件下难以保持性能,限制了电池应用.

研究的目的:

开发一种可充电的SSNMB,能够在广泛的温度范围内稳定运行,包括零下温度.
为了解决低温下金属阳极和固体电解质之间的界面电阻问题.

主要方法:

在SSNMB中使用了NASICON类型的固体电解质.
研究了从-20°C到45°C的Na金属/SE界面的界面电阻.
在-20°C进行长期的Na-metal/剥离循环.
在整个电池系统中使用Na3V1.5Al0.5(PO4) 3阴极.

主要成果:

从-20°C到45°C实现了SSNMB稳定的运行.
保持低的界面电阻 (0.4 Ω cm2在45 °C, <110 Ω cm2在-20 °C).
经过2000多小时的稳定Na-金属循环在-20°C以最小的极化.
观察到形成一个均的Na3-xCaxPO4介相层,增强介面稳定性.
充满电池在-20°C时显示80mAhg-1容量,在0°C时保持108mAhg-1.

结论:

基于NASICON的SSNMB表现出极好的低温性能和阳极稳定性.
开发的相间层对于广泛的温度运行能力至关重要.
这项工作显著扩大了SSNMB的操作温度范围,使所有季节的应用成为可能.

关键词:

这是NASICON型的固体电解质.纳米金属电池的使用方法接口电阻的介面电阻.在低温下运行.

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