高率驱动的中度格子扭曲改善了化物固态电解质的离子导电性和高电压稳定性
Qian Zhao1, Weizong Wang1, Cheng Ruan1
1School of Materials Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery, Changzhou University, Changzhou 213164, China.
ACS applied materials & interfaces
|December 13, 2025
概括
一种新的高策略可以为高能全固态电池 (ASSB) 制造先进的化物固态电解质 (SSEs). 这种方法增强了离子导电性和高压稳定性,这对于下一代储能至关重要.
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:
- 开发高能全固态电池 (ASSB) 需要具有高离子导电性和高电压稳定的固态电解质 (SSE).
- 改善SSE的传统方法通常涉及离子导电性和电压稳定性之间的权衡.
- 现有的策略,如阴离子替代或离子工程,在同时实现所需性质方面存在局限性.
研究的目的:
- 设计和合成新型化物SSEs,使用高的策略来克服传统方法的局限性.
- 调查SSE中高度诱导的格子扭曲和离子导电/电压稳定性之间的关系.
- 评估开发的SSE在高能ASSB中的表现.
主要方法:
- 采用高的策略来合成Li3-4x在1-6xFexYxZr2xHf2xCl6通过Li3InCl6的多重置换.
- 使用实验技术和理论计算对合成材料 (HE-LIC) 进行了表征.
- 使用HE-LIC电解质和LiCoO2阴极进行性能测试的制造ASSB.
主要成果:
- 合成的Li2.92In0.88Fe0.02Y0.02Zr0.04Hf0.04Cl6 (HE-LIC) 呈现中度格子扭曲的情况.
- 在25°C时达到1.136mS cm-1的高离子导电性,并提高了高压稳定性.
- 在使用LiCoO2阴极的ASSB中表现出卓越的电化学性能,包括高放电能力和4.5V和4.6V的稳定循环.
结论:
- 高的策略有效地实现了适度的晶格扭曲,增强了Li+传导,并抑制了Cl-氧化.
- 作为高能ASSB的先进SSE,HE-LIC显示出显著的潜力.
- 这项工作突出了高材料设计的承诺,用于开发下一代固态电池.
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