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在乙烯酸介质中合成Li₇P₃S₁₁固体电解质,用于全固态离子电池

Tran Anh Tu^1,2,3, Nguyen Huu Huy Phuc^1,2,3

¹Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet Str., Dist. 10 Ho Chi Minh City Vietnam nhhphuc@hcmut.edu.vn.

|September 17, 2025

概括

一种新的湿化学合成方法产生了具有高离子导电性的Li7P3S11固态电解质. 这种材料证明了高压固态电池的稳定性,并显示了可充电离子应用的前景.

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
固态化学固态化学

背景情况:

固态电解质 (SE) 对于开发更安全,更高效的可充电电池至关重要.
在SE中实现高离子导电性和电化学稳定性仍然是先进电池技术的关键挑战.

研究的目的:

为Li7P3S11固态电解质开发一种易于湿化学合成的途径.
描述合成的Li7P3S11.11的结构和电化学特性.
为了评估Li7P3S11在固态电池 (SSB) 配置中的性能.

主要方法:

使用乙烯酸作为溶剂进行湿化学合成.
通过X射线衍射,拉曼光谱和31P核磁共振进行结构分析.
使用循环电量计,直流和交流电化学阻抗光谱的电化学评估.

主要成果:

合成的Li7P3S11固体电解质 (SE) 在25°C时达到1.5 × 10-3 S cm-1的Li+导电性.
电化学测量证实Li7P3S11是一种单一的Li+导体,其稳定性高达5.0V与Li+/Li相比.
结合Li7P3S11和LiNi1 / 3Mn1 / 3Co1 / 3O2的固态电池 (SSB) 证明了长达50个周期的稳定循环.

结论:

简单的湿化学合成方法有效地生产高性能Li7P3S11固态电解质.
7P3S11表现出优异的离子导电性和电化学稳定性,使其适用于高压应用.
合成的Li7P3S11 SE是下一代可充电固态离子电池的一个有希望的材料.

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