用于全固态锂离子电池的超离子固体电解质LiLaZrO的合成与热力学

Superionic Solid Electrolyte LiLaZrO Synthesis and Thermodynamics for Application in All-Solid-State Lithium-Ion Batteries.

作者信息

Aleksandrov Daniil, Novikov Pavel, Popovich Anatoliy, Wang Qingsheng

机构信息

Institute of Machinery, Materials, and Transport, Peter the Great St. Petersburg Polytechnic University, 195251 Saint Petersburg, Russia.

CHN/RUS New Energy and Material Technology Research Institute, Huzhou 313100, China.

出版信息

Materials (Basel). 2021 Dec 31;15(1):281. doi: 10.3390/ma15010281.

DOI:10.3390/ma15010281

PMID:35009427

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8746261/

Abstract

Solid-state reaction was used for LiLaZrO material synthesis from LiCO, LaO and ZrO powders. Phase investigation of LiLaZrO was carried out by x-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS) methods. The thermodynamic characteristics were investigated by calorimetry measurements. The molar heat capacity (), the standard enthalpy of formation from binary compounds (Δ) and from elements (Δ), entropy (), the Gibbs free energy of the LiLaZrO formation (∆ ) and the Gibbs free energy of the LLZO reaction with metallic Li (∆) were determined. The corresponding values are = 518.135 + 0.599 × T - 8.339 × T, (temperature range is 298-800 K), Δ = -186.4 kJ·mol, Δ = -9327.65 ± 7.9 kJ·mol, = 362.3 J·mol·K, ∆ = -9435.6 kJ·mol, and ∆ = 8.2 kJ·mol, respectively. Thermodynamic performance shows the possibility of LiLaZrO usage in lithium-ion batteries.

摘要

采用固态反应法，以碳酸锂、氧化镧和氧化锆粉末为原料合成LiLaZrO材料。通过X射线衍射（XRD）、扫描电子显微镜（SEM）和能量色散X射线光谱（EDS）方法对LiLaZrO进行相分析。通过量热法测量研究其热力学特性。测定了LiLaZrO的摩尔热容（）、由二元化合物生成的标准焓（Δ）和由元素生成的标准焓（Δ）、熵（）、LiLaZrO生成的吉布斯自由能（∆）以及LLZO与金属锂反应的吉布斯自由能（∆）。相应的值分别为 = 518.135 + 0.599×T - 8.339×T（温度范围为298 - 800 K）、Δ = -186.4 kJ·mol、Δ = -9327.65 ± 7.9 kJ·mol、 = 362.3 J·mol·K、∆ = -9435.6 kJ·mol和∆ = 8.2 kJ·mol。热力学性能表明LiLaZrO在锂离子电池中具有应用潜力。