A flexible three-dimensional composite nanofiber enhanced quasi-solid electrolyte for high-performance lithium metal batteries. Issue 2 (16th November 2020)

• Record Type: Journal Article
• Authors: Li, Shuyuan; Li, Nianwu; Sun, Chunwen
• Is Part Of: Inorganic chemistry frontiers. Volume 8:Issue 2(2021)
• Page Start: 361
• Page End: 367
• Publication Date: 2020-11-16
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d0qi01159b
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : A quasi-solid-state electrolyte based on LATP-PVDF-HFP nanofiber matrix and gel is proposed. The fabricated battery exhibits a good discharge capacity of 146.6 mA h g −1 at 2C, while the capacity retention can reach 97% after 300 cycles at 0.5C. Abstract : Solid-state lithium-ion batteries have attracted great attention in recent years due to their remarkable safety and high energy density. However, the ionic conductivities of most solid-state electrolytes (SSE) are still not high enough for practical applications. Herein, we report a high-performance quasi-solid-state electrolyte composed of an electrospinning LATP-PVDF-HFP nanofiber matrix and an in situ formed gel. The prepared quasi-solid gel electrolyte shows a 3D porous network with significantly improved ionic conductivity up to 3.394 mS cm −1 . Meanwhile, the quasi-solid-state electrolyte exhibits a wider electrochemical window than the gel electrolyte, due to the synergistic effect between the 3D network fiber and in situ formed gel. The Li|CGE|LiFePO4 battery with this quasi-solid gel electrolyte shows good rate capability and cycling stability, and the discharge capacity of the cell is 146.6 mA h g −1 at 2C. The capacity retention can still reach 97% after 300 cycles at 0.5C. This work provides a promising strategy for designing high-performance lithium metal batteries.