NaSICON型LATP和LAGP固体电解质的合成和性能。,ChemSusChem

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NaSICON型LATP和LAGP固体电解质的合成和性能。
ChemSusChem ( IF 7.5 ) Pub Date : 2019-07-24 , DOI: 10.1002/cssc.201900725
Rachel DeWees ₁ , Hui Wang ₁

Affiliation

无机固体电解质在固态锂电池中起着至关重要的作用，可实现高安全等级和高能量密度。固体电解质的合成方法对于基础研究和实际应用都非常重要。Li1 + x Alx Ti2-x（PO4）3（LATP）和Li1 + x Alx Ge2-x（PO4）3（LAGP）是具有钠超离子导体（NaSICON）结构的两种代表性固体电解质。在本文中，从合成的角度回顾了LATP和LAGP固体电解质，并将其与它们的结构和导电性能以及它们在电池中的电化学应用相关联。首先，描述了基于固体和液体的LATP和LAGP固体电解质的合成方法及其主要影响因素。第二，介绍了通过不同合成方法获得的晶体结构和相纯度。第三，比较了对LATP和LAGP固体电解质的电导率的导电机理，组成效应和合成效应。第四，讨论了这两种固体电解质在完整电池中的电化学应用，包括作为固体电解质，电极中的复合组分以及电极上的表面涂层的作用。在上一节中，简要概述了用于全固态电池的NaSICON型固体电解质的未来发展。讨论了这两种固体电解质在完整电池中的电化学应用，包括作为固体电解质的作用，电极中的复合成分以及电极上的表面涂层。在上一节中，简要概述了用于全固态电池的NaSICON型固体电解质的未来发展。讨论了这两种固体电解质在完整电池中的电化学应用，包括作为固体电解质的作用，电极中的复合成分以及电极上的表面涂层。在上一节中，简要概述了用于全固态电池的NaSICON型固体电解质的未来发展。

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Synthesis and Properties of NaSICON-type LATP and LAGP Solid Electrolytes.

Inorganic solid electrolytes play a critical role in solid-state lithium batteries achieving high safety levels and high energy densities. The synthetic approaches to solid electrolytes are important for both fundamental research and practical applications. Li1+x Alx Ti2-x (PO4 )3 (LATP) and Li1+x Alx Ge2-x (PO4 )3 (LAGP) are two representative solid electrolytes with a sodium superionic conductor (NaSICON) structure. Herein, LATP and LAGP solid electrolytes are reviewed from the synthesis perspective, and correlated with their structure and conductive properties, as well as their electrochemical applications in batteries. First, the solid- and liquid-based synthetic methods to LATP and LAGP solid electrolytes and the key influencing factors are described. Second, the crystal structures and phase purities obtained from different synthetic approaches are introduced. Third, the conductive mechanisms, composition effects, and synthetic effects on the conductivities of LATP and LAGP solid electrolytes are compared. Fourth, the electrochemical applications of these two solid electrolytes in full batteries are discussed, including roles as solid electrolytes, composite components in electrodes, and surface coatings on electrodes. In the last section, a brief outlook is provided on the future development of NaSICON-type solid electrolytes for all-solid-state batteries.

更新日期：2019-07-24

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