新能源飞行器动力电池用先进固态电解质烧结技术研究OA

Solid-state electrolytes are regarded as a cutting-edge technology and a significant breakthrough direction in the field of aviation batteries.Lithium metal solid-state batteries composed of solid-state electrolytes and lithium metal have outstanding characteristics such as high safety,long cycle life,high energy density,and high output power density.However,due to the current limitations of solid-state electrolyte preparation technology,the commercialization process of solid-state batteries still requires time.In this paper,Li1.5Al0.5Ge1.5(PO4)3 LAGP solid-state electrolytes were prepared by pressure sintering.By applying constant pressure during the sintering process,the sintering driving force was increased,and the grain rearrangement and densification mechanisms were strengthened,such as promoting plastic flow and diffusion creep,effectively avoiding abnormal grain growth and gaseous defects,significantly improving the material density and ionic conductivity,and providing new ideas and methods for the sintering of solid-state electrolytes.The results show that hot-pressing sintering is conducive to grain growth,and the prepared LAGP electrolyte has uniform grains on the cross-section,high crystallinity,a relative density of 97.34％,an ionic conductivity of 3.34×10-4 S/cm,and an activation energy of 0.33 eV.