Fluorinated reduced graphene oxide as a protective layer on the metallic lithium for application in the high energy batteries

Metallic lithium is considered to be one of the most promising anode materials since it offers high volumetric and gravimetric energy densities when combined with high-voltage or high-capacity cathodes. However, the main impediment to the practical applications of metallic lithium is its unstable so...

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Published in:Scientific reports 2018-04, Vol.8 (1), p.5819-10, Article 5819
Main Authors: Bobnar, Jernej, Lozinšek, Matic, Kapun, Gregor, Njel, Christian, Dedryvère, Rémi, Genorio, Boštjan, Dominko, Robert
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140/146
639/4077/4079/891
639/638/298/918
Analytical chemistry
Cathodes
Chemical Sciences
Electrochemistry
Humanities and Social Sciences
Lithium
Material chemistry
multidisciplinary
or physical chemistry
Polymers
Science
Science (multidisciplinary)
Theoretical and
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creator Bobnar, Jernej
Lozinšek, Matic
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Genorio, Boštjan
Dominko, Robert
description Metallic lithium is considered to be one of the most promising anode materials since it offers high volumetric and gravimetric energy densities when combined with high-voltage or high-capacity cathodes. However, the main impediment to the practical applications of metallic lithium is its unstable solid electrolyte interface (SEI), which results in constant lithium consumption for the formation of fresh SEI, together with lithium dendritic growth during electrochemical cycling. Here we present the electrochemical performance of a fluorinated reduced graphene oxide interlayer (FGI) on the metallic lithium surface, tested in lithium symmetrical cells and in combination with two different cathode materials. The FGI on the metallic lithium exhibit two roles, firstly it acts as a Li-ion conductive layer and electronic insulator and secondly, it effectively suppresses the formation of high surface area lithium (HSAL). An enhanced electrochemical performance of the full cell battery system with two different types of cathodes was shown in the carbonate or in the ether based electrolytes. The presented results indicate a potential application in future secondary Li-metal batteries.
doi_str_mv 10.1038/s41598-018-23991-2
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subjects 140/146
639/4077/4079/891
639/638/298/918
Analytical chemistry
Cathodes
Chemical Sciences
Electrochemistry
Humanities and Social Sciences
Lithium
Material chemistry
multidisciplinary
or physical chemistry
Polymers
Science
Science (multidisciplinary)
Theoretical and
title Fluorinated reduced graphene oxide as a protective layer on the metallic lithium for application in the high energy batteries
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