Poly(ionic liquid)s/Electrospun Nanofiber Composite Polymer Electrolytes for High Energy Density and Safe Li Metal Batteries.

Wang, X and Girard, GMA and Zhu, H and Yunis, R and Macfarlane, DR and Mecerreyes, D and Bhattacharyya, AJ and Howlett, PC and Forsyth, M (2019) Poly(ionic liquid)s/Electrospun Nanofiber Composite Polymer Electrolytes for High Energy Density and Safe Li Metal Batteries. In: ACS Applied Energy Materials, 2 (9). pp. 6237-6245.

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Abstract

Solid-state electrolytes with mechanical integrity and high ionic conductivity are important components in high performance all-solid-state lithium (Li) batteries. Relative to these electrolytes, ionic liquid-based composite polymer electrolytes exhibit high ionic conductivity and improved safety. However, the incorporation of large concentration of nonactive ions and the presence of a liquid phase lead to relatively low Li+ transference number and poor mechanical properties. In this study, poly(ionic liquid)s or polymerized ionic liquids (polyILs) are combined with an electrospun fibrous support to afford electrolytes with high ionic liquid content and greatly increased Li+ transference number. The incorporation of electrospun PVDF nanofibers effectively improves the mechanical strength of the composite polymer electrolytes, and consequently, flexible electrolytes with superior mechanical properties are described. Finally, we demonstrate the performance of high energy density Li metal batteries under high-voltage operation (up to 4.5 V) using LiNiMnCoO2 (NMC) and LiNi0.8Co0.15Al0.05O2 (NCA) cathodes with an areal capacity up to 1.1 mAh cm-2 Copyright © 2019 American Chemical Society.

Item Type:	Journal Article
Publication:	ACS Applied Energy Materials
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to American Chemical Society.
Keywords:	Aluminum compounds; Ionic conduction in solids; Ionic conductivity; Ionic liquids; Lithium; Lithium compounds; Lithium-ion batteries; Manganese compounds; Mechanical properties; Nanofibers; Nickel compounds; Solid electrolytes; Solid-State Batteries, Composite polymer electrolytes; Energy density; High voltage; Li metal; Poly(ionic liquid)s, Polyelectrolytes
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	05 Jan 2023 10:24
Last Modified:	05 Jan 2023 10:24
URI:	https://eprints.iisc.ac.in/id/eprint/78795

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