电解质
快离子导体
复合数
介电谱
锂(药物)
材料科学
电阻抗
电容
放松(心理学)
离子
兴奋剂
分析化学(期刊)
化学
化学工程
复合材料
电化学
电气工程
光电子学
电极
物理化学
色谱法
内分泌学
有机化学
工程类
社会心理学
医学
心理学
作者
E. A. Il’ina,Д.А. Осинкин
标识
DOI:10.1016/j.jpowsour.2023.233370
摘要
Solid electrolytes based on Li7La3Zr2O12 are promising membranes for all–solid–state batteries. However, the main parameters of all transport stages in composite and doped Li7La3Zr2O12 could not be determined by conventional impedance fitting. A tremendous assistance in the analysis of impedance spectra over the past few years has become the method of distribution of relaxation times (DRT). In the present study, a composite electrolyte Li7La3Zr2O12 – Li2O–B2O3–SiO2 was investigated by impedance spectroscopy. A detailed analysis of the impedance spectra by DRT showed that the additional peak appears on the DRT function with the introduction of glass; this interfacial resistance is responsible for the transfer of lithium ions across the Li7La3Zr2O12/glass interface. The resistance, capacitance and relaxation frequency of all the transport stages in the composite electrolytes were determined based on the analysis of the DRT functions. It was found that the Li7La3Zr2O12/glass resistance decreases with increasing fraction of glassy additive. It was established that the DRT technique can be successfully used to deeper understanding of the transport stages of lithium ions in composite and doped solid electrolytes for all–solid–state batteries.
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