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利用原生Li₂CO₃层在Li₇La₃Zr₂O₁₂ (LLZO) 上,用于半固态电池中的高性能三层复合电解质

Youngmin Moon¹, Heesu Kim¹, Minh Hai Nguyen¹

¹Department of Materials Science and Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea.

Small (Weinheim an der Bergstrasse, Germany)

|October 31, 2025

概括

使用乙烯乙酸乙烯 (EVA) 的新型三层电解质结构可以防止半固态电池的凝. 这项创新提高了离子电导率和周期稳定性,用于商业化.

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
固态电池固态电池是什么

背景情况:

高含量的无机固体电解质 (ISEs) 对半固体电解质 (SSSEs) 是至关重要的.
石榴石型Li7La3Zr2O12 (LLZO) 是一个有前途的ISE,但表面LiOH/Li2CO3层会导致PVDF-HFP的泥凝,阻碍大规模生产.
现有的方法需要LLZO表面处理来去除这些层,限制实用性.

研究的目的:

开发一种新的三层电解质结构,克服SSSE中LLZO的凝问题.
为了增强复合电解质的离子导电性和离子传输特性.
为了证明使用这种新的电解质结构的电池的改进的电化学性能和循环稳定性.

主要方法:

三层结构的制造:LLZO支架涂有乙烯乙酸乙烯 (EVA),然后在两侧涂有PVDF-HFP.
使用7Li MAS固态NMR和T1放松时间测量,对离子运输的表征.
使用新型电解质对/NCM半细胞和石墨/LFP袋全细胞进行电化学测试.

主要成果:

在PVDF-HFP/LLZO-EVA/PVDF-HFP三层结构有效抑制凝.
实现了高的转移数 (0.89) 和有效的离子导电率 (0.38 mS cm-1).
在半细胞和全细胞配置中,在200多个周期中表现出卓越的循环特性.

结论:

三层结构为SSSE中LLZO凝问题提供了切实可行的解决方案,不需要表面处理.
这种方法显著改善了离子运输和电池循环性能.
这种简单的制造方法为半固态电池的商业化开辟了新的途径.

关键词:

李的转移号码李的转移号码 Li7La3Zr2O1212 的使用方法金属电池金属电池一个袋子细胞.复合聚合物电解质的电解质.乙烯乙乙烯酸乙烯乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯酸乙烯半固态电解质半固态电解质

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