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Updated: Sep 14, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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高度可变形,离子导电的水化物替代硫化物电解质,在低堆压力下提供卓越的性能

Shunsuke Kawaguchi¹, Naomi Fukiya¹, Kei Ehara¹

¹Consortium of Lithium Ion Battery Technology and Evaluation Research Center (LIBTEC), 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan.

Advanced materials (Deerfield Beach, Fla.)

|July 21, 2025

概括

这项研究表明,可变形固体电解质Li3PS4-xLiBH4 (LPSBH) 能够在完全固态电池中实现稳定的接口. 这一突破允许高性能储能,具有优良的循环寿命.

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 (ASSB) 为传统离子电池提供了更安全的替代方案.
在ASSB中实现最佳性能取决于在电极活性材料 (AM) 和固体电解质 (SE) 之间建立稳定的接口.
降低AM-SE交叉点的界面阻力是ASSB开发的一个关键挑战.

研究的目的:

为了研究Li3PS4-xLiBH4 (LPSBH) 的机械性能,特别是可变形性,它是一种基于硫化物的固体电解质.
评估LPSBH与电极活性材料之间形成稳定的物理接口接触的情况.
为了证明ASSB使用LPSBH在低应用压力下的性能.

主要方法:

通过机械削合成LPSBH固体电解质.
评估LPSBH在低压下实现的变形性和相对密度.
对称细胞的制造和测试,以定量评估AM-SE接口接触.
组装和电化学测试一个13mAh级的层ASSB,包括LPSBH.

主要成果:

在低施加压力下,LPSBH具有足够的可变性,可以达到高相对密度.
在电极层内成功形成了良好的AM-SE接口接触,通过对称细胞测试证实了这一点.
层状ASSB在25°C温度下表现出6C充电能力,只需5MPa的堆叠压力.
在1C/1C条件下1000个循环后,电池保持了大约70%的容量,表明了显著的循环稳定性.

结论:

LPSBH的可变性对于在ASSB中创建有效的AM-SE接口至关重要.
低压处理LPSBH使得高性能ASSB具有增强的循环稳定性.
这项工作为开发实用和高性能全固态电池提供了可行的途径.

关键词:

在NCM/石墨中使用.所有固态电池都是固态电池.它具有可变形的可变形性.层状纤维类型的细胞基于硫化物的固体电解质.

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