Microstructure, mechanical properties, and ionic conductivity of a solid-state electrolyte prepared using binderless laser powder bed fusion
Microstructure, mechanical properties, and ionic conductivity of a solid-state electrolyte prepared using binderless laser powder bed fusion
复制标题
DOI：
10.1557/s43578-021-00390-4
复制
发表时间：
2021-09
影响因子：
2.7
通讯作者：
Katherine A. Acord;A. Dupuy;Xin Wang;Alexandra L. Vyatskikh;O. Donaldson;T. Rupert;James J. Wu
中科院分区：
文献类型：
--
作者：
Katherine A. Acord;A. Dupuy;Xin Wang;Alexandra L. Vyatskikh;O. Donaldson;T. Rupert;James J. Wu
控制玻璃陶瓷固态电解质Li 1 + xAlxTi 2-x（PO 4）3（LATP）的微观结构可通过增强离子电导率来提高性能;然而，传统的玻璃陶瓷加工需要多个加工步骤来成功地形成微观结构。基于激光的增材制造技术，如激光粉末床熔融（L-PBF），为电池应用的玻璃陶瓷的单步制造提供了一种新方法。在这里，我们调查的L-PBF处理的微观结构，力学性能和离子导电性的LATP的影响。该研究表明，无粘合剂L-PBF产生相对致密的LATP样品（高达~ 96%致密），具有与常规LATP一致的所需菱形晶体结构和机械性能。我们发现激光扫描速度影响第二相粒子的发展，从而影响离子电导率。进一步的参数优化将提高L-PBF LATP的离子电导率，以使用无粘合剂激光增材制造实现LATP作为固态电池电解质的单步制造。
Manipulating the microstructure of the glass–ceramic solid-state electrolyte Li1+xAlxTi2-x(PO4)3 (LATP) improves performance by enhancing ionic conductivity; however, conventional glass–ceramic processing requires multiple processing steps to successfully develop the microstructure. Laser-based additive manufacturing techniques, such as laser powder bed fusion (L-PBF), offer a novel approach to single-step fabrication of glass–ceramics for battery applications. Here, we investigate the influence of L-PBF processing on the microstructure, mechanical properties, and ionic conductivity of LATP. This study demonstrates that binderless L-PBF produces relatively dense LATP samples (up to ~ 96% dense) with the desired rhombohedral crystal structure and mechanical properties consistent with conventional LATP. We find that laser scan speed influences the development of secondary phase particles, which affect the ionic conductivity. Further parameter optimization will improve the ionic conductivity of L-PBF LATP to enable single-step fabrication of LATP as a solid-state battery electrolyte using binderless laser-based additive manufacturing.