Monolithic Task‐Specific Ionogel Electrolyte Membrane Enables High‐Performance Solid‐State Lithium‐Metal Batteries in Wide Temperature Range

Monolithic ionogel electrolyte membranes (IGEMs) based on gelling scaffolds and ionic liquids have aroused intensive interest because of their broad processing compatibility, nonflammability, and favorable thermal and electrochemical features. However, the absence of functional scaffolds that concur...

Full description

Saved in:
Bibliographic Details
Published in:Advanced functional materials 2022-04, Vol.32 (14), p.n/a
Main Authors: Yu, Le, Yu, Lu, Liu, Qing, Meng, Tao, Wang, Sen, Hu, Xianluo
Format: Article
Language:English
Subjects:
Electrolytes
Electrolytic cells
Ion transport
ionic conductivity
Ionic liquids
ionogels
Ions
Lithium
lithium‐metal batteries
Materials science
Membranes
Nanofibers
Product safety
Scaffolds
solid‐state electrolytes
Thermal stability
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Monolithic ionogel electrolyte membranes (IGEMs) based on gelling scaffolds and ionic liquids have aroused intensive interest because of their broad processing compatibility, nonflammability, and favorable thermal and electrochemical features. However, the absence of functional scaffolds that concurrently enable high mechanical strength and Li+ transportability of IGEMs constrains the battery power and safety. Herein, a task‐specific IGEM monolith featuring high Li+ conductivity and outstanding thermal stability is demonstrated, whereby electrospun positively charged poly(ionic liquid) nanofibers serve as a thermotolerant scaffold for the IGEM. Regulating the Li+ environment in the IGEM enables the shift from the sluggish vehicular to fast structural Li‐ion transport mode. With the unique IGEM, the solid‐state Li||LiFePO4 cells achieve improved rate capability and good cyclability in a wide temperature range from 0 to 90 °C. Furthermore, practical solid‐state Li||LiFePO4 pouch cells with a cathode capacity of ≈2 mAh cm−2 have also been demonstrated. Regulating the Li+ environment via task‐specific scaffolds enables ionogel electrolytes with fast structural Li+ mobility. An unusual monolithic ionogel electrolyte membrane (IGEM) based on poly(ionic liquid) nanofibers with a high Li‐ion transference number is demonstrated. Practical solid‐state Li|IGEM|LiFePO4 cells achieve outstanding rate capability in a wide temperature range from 0 to 90 °C.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202110653