Abstract Concerning the safety problems of conventional Li-ion batteries with liquid electrolytes, it is crucial to develop reliable solid-state electrolytes with high ionic conductivity. Li 1+x Al x Ti 2−x (PO 4 ) 3 (LATP, x = 0.3) is regarded as one of the most promising solid electrolytes due to its high ionic conductivity and excellent chemical stability to humidity. Herein, a new strategy is proposed for improving the sintering behavior and enhancing the ionic conductivity of LATP by using LiBO 2 as the sintering aid via liquid phase sintering. The as-prepared sample LATP with homogeneous microstructure and high relative density of 97.1% was successfully synthesized, yielding high total ionic conductivity of 3.5 × 10 −4 S cm −1 and low activation energy of 0.39 eV at room temperature. It was found that the addition of LiBO 2 could effectively enhance the densification and increase the ionic conductivity of LATP electrolyte, proving an effective way to synthesis LATP ceramics by a simple and reliable route.

中文翻译：

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LiBO 2 添加对Li 1+x Al x Ti 2-x (PO 4 ) 3 (x=0.3) 陶瓷电解质的微观结构和锂离子电导率的影响

摘要 针对传统液态电解质锂离子电池的安全问题，开发具有高离子电导率的可靠固态电解质至关重要。Li 1+x Al x Ti 2-x (PO 4 ) 3 (LATP, x = 0.3) 由于其高离子电导率和优异的湿度化学稳定性而被认为是最有前途的固体电解质之一。在此，提出了一种通过液相烧结使用 LiBO 2 作为烧结助剂来改善烧结行为和提高 LATP 离子电导率的新策略。所制备的样品 LATP 具有均匀的微观结构和 97.1% 的高相对密度，在室温下产生 3.5 × 10 -4 S cm -1 的高总离子电导率和 0.39 eV 的低活化能。