Affiliation:
1. Research Institute of Chemical Defense
2. China National new energy vehicle technology innovation center
Abstract
Abstract
Lithium ion (Li+) battery with conventional liquid electrolyte exists typical and notorious security risk. Composite solid electrolyte integrating the merits of various electrolyte systems is an attractive alternative of liquid electrolyte for new-type safety and long-life lithium (Li) batteries. Herein, a 3D framework composite solid electrolyte based on Al2O3 modified Li1.4Al0.4Ti1.6(PO4)3 (Al2O3@LATP) was prepared by solution casting and scraping method. The 3D framework composite electrolyte exhibits admirable ionic conductivity (1.1×10− 4 S cm− 1 at 60oC), wide voltage window (4.8 V vs. Li/Li+), good thermal stability and satisfactory electrolyte/electrode interfacial compatibility. The Al2O3@LATP can not only impede Li dendrite growth, but also avoid the LATP reaction with Li anode. The assembled solid-state LiFePO4|Li battery with 3D framework composite solid electrolyte delivers a satisfactory capacity retention up to 95.2% after 400 cycles at 0.5 C and under 60oC. The 3D framework structural design of solid electrolyte affords a promising options for realizing safe energy storage systems.
Publisher
Research Square Platform LLC