Preparation and performance study of cellulose nanofibers and LATP-modified PEO solid electrolyte
Cellulose acetate nanofiber membranes were prepared by electrospinning,followed by deacetylation treatment,and Li1.4Al0.4Ti1.6(PO4)3 inorganic particles were introduced to modify the polyethylene oxide(PEO)electrolyte,which could improve ionic conductivity,lithium-ion migration number,and cycling stability of lithium-sulfur batteries.The results showed that the ionic conductivity of the cellulose nanofibers and LATP-modified PEO solid electrolyte reached 3.43×10-4S/cm at 60℃,and the lithium-ion migration number reached 0.44,which were higher than those of the unmodified PEO solid electrolyte.The modified PEO solid electrolyte exhibited an initial discharge-specific capacity of 844.13mAh/g at 60℃ and 0.1C,and achieved 50 cycles.
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