Phys.org October 3, 2022
The thick electrolyte layer and rigid nature as well as poor interfacial contact of doped garnet-type solid electrolytes are obstacles for its application in all-solid-state lithium batteries. Through solvent-free procedure researchers in China developed an ultrathin flexible Li6.4La3Zr1.4Ta0.6O12- (LLZTO-) based solid electrolyte with 90 wt% LLZTO. The resulting film exhibited ultrahigh ionic conductance of 41.21 mS at 30°C, excellent oxidation stability of 4.6 V, superior thermal stability and nonflammability. The assembled Li||LiFePO4 pouch cell with integrated electrolyte/cathode interface exhibited excellent rate performances and cycle performances with a capacity retention of 71.4% from 153 mAh g-1 to 109.2 mAh g-1 at 0.1 C over 500 cycles under 60°C. According to the researchers their work provides a promising strategy towards realizing ultrathin flexible solid electrolyte for high-performance all-solid-state lithium batteries…read more. Open Access TECHNICAL ARTICLE
photographs of ultrathin Li6.4La3Zr1.4Ta0.6O12-based film. Credit: Qingya Guo, Ningbo Institute of Materials Technology and Engineering