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Yu-Kai Liao¹, Ru-Shi Liu², Shu-Fen Hu¹

¹Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan.

ACS applied materials & interfaces

|September 8, 2023

概括

研究人员开发了一种使用和MXene的新型复合电极,用于全固态离子电池 (ASSLIB). 这项创新显著降低了接口阻抗,提高了电池性能,为更安全,高能量密度的储能解决方案铺平了道路.

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:

下一代离子电池需要高能量密度和安全性,推动了全固态电池开发的需求.
全固态离子电池 (ASSLIB) 通过使用金属阳极,降低可燃性风险,提高了安全性.
接口阻抗是限制固态电池性能的一个关键因素.

研究的目的:

开发一种复合阳极,以减少所有固态离子电池的接口阻抗.
通过使用石榴石型固体电解质和新型复合阳极,研究ASSLIB的性能提升.
探索将纳入复合材料阳极的协同效应,以改善电池特性.

主要方法:

使用高导电性石榴石型Li$_{6.75}$La$_{3}$Zr$_{1.75}$Ta$_{0.25}$O$_{12}$ (LLZTO) 作为固体电解质.
通过化 (Li) 和MXene-MAX形成一个复合阳极.
调查了Li-MXene RadeLLZTO RadeLFP和Li-MXene-Pt RadeLLZTO RadeLFP全电池的性能.

主要成果:

用Li-MXene复合阳极将接口阻抗从566降至55 Ω cm$^2$.
该Li-MXene蓄电池的初始放电容量为163.0 mAh g$^{-1}$,并且在100个周期内保持了90.2%的容量.
-MXene-Pt复合阳极表现出协同效应,产生了150.0mAhg$^{-1}$的初始容量,93.3%的保留率,以及0.04V的低超电位.

结论:

复合阳极显著改善ASSLIB的接口特性和电化学性能.
将金添加到Li-MXene阳极中,进一步增强了循环稳定性,并减少了超电位.
这些发现突出了开发高性能和安全的全固态离子电池的有希望的战略.

关键词:

-Ptt是一种.在Mxenex中使用.石榴石的石榴石是指一个石榴石的石榴石.固态离子电池固态离子电池有协同效应的效应.

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