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在Li₇La₃Zr₂O₁₂固体电解质中改善离子导电性的最新策略

Evgeniya Il'ina¹

¹Laboratory of Electrochemical Power Sources, Institute of High Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences, Yekaterinburg 620990, Russia.

International journal of molecular sciences

|August 26, 2023

概括

化Li7La3Zr2O12 (LLZ) 固体电解质稳定了立方相,增强了全固态电池的离子导电性. 联合兴奋剂策略进一步提高了性能,降低了制造成本.

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:

固体电解质的高离子导电性对于全固态电池等先进的电源至关重要.
基于Li7La3Zr2O12 (LLZ) 石榴石的离子固体电解质非常受欢迎,因为它们具有高性能潜力.
LLZ表现出四角形和立方形结构修改,立方相提供优越的离子导电性.

研究的目的:

审查用于稳定Li7La3Zr2O12 (LLZ) 的高导电性立方相的兴奋剂策略.
研究各种剂对LLZ固体电解质的结构,微结构和导电性质的影响.
突出双重和多重兴奋剂方法的好处,以提高LLZ的性能和降低生产成本.

主要方法:

关于Li7La3Zr2O12 (LLZ) 固体电解质的兴奋剂策略的文献综述.
对单元,双元和多元元素兴奋剂对LLZ相稳定性和离子导电性影响的分析.
检查合成方法及其对LLZ微观结构和特性的影响.

主要成果:

用Ga3+ (取代Li+) 或Te6+ (取代Zr4+) 实现单一注,在室温下达到~10^-3 S/cm的离子导电性.
双元素兴奋剂,特别是在Zr位点,对LLZ导电性产生了积极影响.
与Al和Ga同时替代Li/Zr和Li/La亚电晶体的联合兴奋剂在提高导电性方面被证明是有效的.
兴奋剂策略也导致了降低热温度和减少对昂贵兴奋剂的依赖.

结论:

兴奋剂是稳定Li7La3Zr2O12 (LLZ) 的立方相和增强其离子导电性的关键策略.
双和多方法提供协同效益,改善导电性,降低加工温度,并可能降低成本.
优化LLZ的兴奋剂对于开发高性能全固态电池至关重要.

关键词:

Li7La3Zr2O1212 的使用方法所有固态电池都是固态电池.兴奋剂的使用兴奋剂的使用石榴石的结构格兰尼特结构.离子导电性的离子导电性.

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