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在现场构建的化-化梯度介层,使硫化基固态电池具有超高的临界电流密度

Zekai Fang¹, Zhan Wu¹, Shengjie Wu¹

¹College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China.

ACS applied materials & interfaces

|June 2, 2025

概括

研究人员为固态电池开发了一种梯度中间层. 这种由含合金和LiF制成的中间层有效地抑制树突并提高电池性能,从而实现更高的能量密度.

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:

全固态电池承诺高能量密度,但面临树生长和界面反应的挑战.
这些问题阻碍了下一代电池的实际应用和安全性.

研究的目的:

为阳极设计一种新的性-性渐变介层.
为了减轻树状石的形成,并提高固态电解质的稳定性.

主要方法:

在阳极上使用金属三甲硫酸盐 (OTf-) 盐改性构建梯度中间层.
形成一个富含LiF的电恐惧的顶层和一个爱金属合金 (Ag,In,Al) 的底层.
对称和完整的细胞的电化学表征,包括梯度中间层.

主要成果:

梯度间层有效调节了均的沉积,并抑制了树岩的形成.
银 (Ag) 在形成一个可调配组合的Li-Ag合金中表现出卓越的性能,用于控制沉积.
带有梯度中间层的对称电池实现了高临界电流密度8.0 mA cm-2.2.
一个全细胞 (NCM/LPSC/AgOTf@Li) 显示了0.345 mA h cm−2的高面积容量,在1.2 mA cm−2的高质量负载下.

结论:

开发的性-性渐变介质层是提高全固态电池性能和安全性的有希望的策略.
-合金中间层显示了使高能量密度固态能量存储设备成为可能的巨大潜力.

关键词:

Ag-Li合金是一种合金.阿吉罗酸盐是固体电解质的电解质.生命的生命生命的生命全固态电池是完全固态的电池.梯度介层之间的梯度.

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