摘要
High cost, low ionic conductivity, and low mechanical strength remain formidable challenges to the practical application of solid electrolyte materials. Rice husk-derived silicon dioxide (abbreviated as RH SiO ) is prepared and incorporated into a polyethylene oxide (PEO) polymer to form a low-cost, high-performance composite polymer electrolyte (CPE). The RH SiO particles possess highly porous channels that allow the PEO to create fast three-dimensional Li-ion pathways for improving ionic conductivity and enhancing the fire resistance and mechanical strength of CPE. Molecular dynamics calculation reveals that under the incorporation of the RH SiO , the ionic conductivity is considerably enhanced as the RH SiO content increases. At room temperature, the 10 wt% RH SiO CPE demonstrates the highest ionic conductivity of 1.1 × 10 −4 S cm −1 ; this is 26.7 times that of the filler-free SPE. The experimental result is consistent with the theoretical calculation. Moreover, the stability and cyclability are considerably improved. The findings demonstrate the excellent commercialization potential of high-energy, all-solid-state Li-S batteries, supporting the possibility of a circular economy.