论文标题
李$ _ {2.9} $ b $ _ {0.9} $ s $ _ {0.1} $ o $ $ $ _ {3.1} $玻璃添加剂的结构和电气属性的影响
Impact of Li$_{2.9}$B$_{0.9}$S$_{0.1}$O$_{3.1}$ glass additive on the structure and electrical properties of the LATP-based ceramics
论文作者
论文摘要
现有的锂离子电池的固体电解质患有低离子电导率低，这限制了其对锂离子电池技术的有用性。其中，基于NASICON的材料，例如LI1.3AL0.3TI1.7（PO4）3（LATP），由于高度抗性的晶界阶段而显示出较低的总离子电导率。有效增强其总离子电导率的可能方法之一是形成复合材料。本文中，将LI2.9B0.9S0.1O3.1玻璃（以下称为LBSO）被选为增材材料，以改善陶瓷LI1.3AL0.3TI1.7（PO4）3基础材料的离子特性。该LI1.3AL0.3TI1.7（PO4）3-XLI2.9B0.9S0.1O3.1（0 <x <0.3）系统已经通过高温X射线衍射测定法（HTXRD），7LI，7LI，11B，11B，27 AL和31p Magic Spiranning Spinning rougnation Resonance Spectrry（Maser）（MASRAVER）（MASRAVER）（MAS）（MAS），MASRAV）（MAS）（MAS），MAS）扫描电子显微镜（SEM），阻抗光谱法（IS）和密度方法。我们在这里表明，外国LBSO相的引入增强了其电特性。这项研究揭示了表观密度，微结构，组成，烧结温度和离子电导率之间的几个有趣的相关性。此外，复合材料的电性能将以实体模型（BLM）的术语进行讨论。对于在800°C下烧结的LATP-0.1LBSO材料，已获得σTOT= 1.5 x 10-4 SCM-1的最高值。
The existing solid electrolytes for lithium ion batteries suffer from low total ionic conductivity, which restricts its usefulness for the lithium-ion battery technology. Among them, the NASICON-based materials, such as Li1.3Al0.3Ti1.7(PO4)3 (LATP) exhibit low total ionic conductivity due to highly resistant grain boundary phase. One of the possible approaches to efficiently enhance their total ionic conductivity is the formation of a composite material. Herein, the Li2.9B0.9S0.1O3.1 glass, called LBSO hereafter, was chosen as an additive material to improve the ionic properties of the ceramic Li1.3Al0.3Ti1.7(PO4)3 base material. The properties of this Li1.3Al0.3Ti1.7(PO4)3-xLi2.9B0.9S0.1O3.1 (0 < x < 0.3) system have been studied by means of high temperature X-ray diffractometry (HTXRD), 7Li, 11B, 27Al and 31P magic angle spinning nuclear magnetic resonance spectroscopy (MAS NMR), thermogravimetry (TG), scanning electron microscopy (SEM), impedance spectroscopy (IS) and density methods. We show here that the introduction of the foreign LBSO phase enhances their electric properties. This study reveals several interesting correlations between the apparent density, the microstructure, the composition, the sintering temperature and the ionic conductivity. Moreover, the electrical properties of the composites will be discussed in the terms of the brick-layer model (BLM). The highest value of σtot = 1.5 x 10-4 Scm-1 has been obtained for LATP-0.1LBSO material sintered at 800°C.
