Issue 2, 2021

A flexible three-dimensional composite nanofiber enhanced quasi-solid electrolyte for high-performance lithium metal batteries

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.

Graphical abstract: A flexible three-dimensional composite nanofiber enhanced quasi-solid electrolyte for high-performance lithium metal batteries

Supplementary files

Article information

Article type
Research Article
Submitted
24 Sep 2020
Accepted
01 Nov 2020
First published
03 Nov 2020

Inorg. Chem. Front., 2021,8, 361-367

A flexible three-dimensional composite nanofiber enhanced quasi-solid electrolyte for high-performance lithium metal batteries

S. Li, N. Li and C. Sun, Inorg. Chem. Front., 2021, 8, 361 DOI: 10.1039/D0QI01159B

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