Dual-Salts Electrolyte with Fluoroethylene Carbonate Additive for High-Voltage Li-Metal Batteries

Qin, Z; Wu, B; Danilov, DL; Eichel, RA; Notten, PHL

Dual-Salts Electrolyte with Fluoroethylene Carbonate Additive for High-Voltage Li-Metal Batteries

Qin, Z Wu, B Danilov, DL Eichel, RA Notten, PHL

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Publisher:: MDPI
Publication Type:: Journal Article
Citation:: Batteries, 2023, 9, (9), pp. 477
Issue Date:: 2023-09-01

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Field	Value	Language
dc.contributor.author	Qin, Z
dc.contributor.author	Wu, B
dc.contributor.author	Danilov, DL
dc.contributor.author	Eichel, RA
dc.contributor.author	Notten, PHL
dc.date.accessioned	2024-04-23T02:53:46Z
dc.date.available	2024-04-23T02:53:46Z
dc.date.issued	2023-09-01
dc.identifier.citation	Batteries, 2023, 9, (9), pp. 477
dc.identifier.issn	2313-0105
dc.identifier.issn	2313-0105
dc.identifier.uri	http://hdl.handle.net/10453/178264
dc.description.abstract	The combination of Li-metal anode and high-voltage cathode is regarded as a solution for the next-generation high-energy-density secondary batteries. However, a traditional electrolyte is either incompatible with the Li-metal anode or vulnerable to high voltage. This work reports a 1 M dual-salts Localized-High-Concentration-Electrolyte with Fluoroethylene carbonate (FEC) additive. It enables stable cycling of Li\|\|LiNi0.8Co0.1Mn0.1O2 (NMC811) battery, which shows 81.5% capacity retention after 300 cycles with a charge/discharge current density of 1 C and a voltage range of 2.7–4.4 V. Scanning electron microscopy (SEM) images show that this electrolyte not only largely reduced Li dendrites and ‘dead’ Li on anode surface but also well protected the microstructure of NMC811 cathode. Possible components of both solid-electrolyte interlayer (SEI) and cathode-electrolyte interlayer (CEI) were characterized by energy-dispersive X-ray spectroscopy (EDX). The result illustrates that FEC protected Li salts from decomposition on the anode side and suppressed the decomposition of solvents on the cathode side.
dc.language	en
dc.publisher	MDPI
dc.relation.ispartof	Batteries
dc.relation.isbasedon	10.3390/batteries9090477
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	4008 Electrical engineering
dc.subject.classification	4014 Manufacturing engineering
dc.title	Dual-Salts Electrolyte with Fluoroethylene Carbonate Additive for High-Voltage Li-Metal Batteries
dc.type	Journal Article
utslib.citation.volume	9
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access	*
dc.date.updated	2024-04-23T02:53:43Z
pubs.issue	9
pubs.publication-status	Published
pubs.volume	9
utslib.citation.issue	9

Abstract:

The combination of Li-metal anode and high-voltage cathode is regarded as a solution for the next-generation high-energy-density secondary batteries. However, a traditional electrolyte is either incompatible with the Li-metal anode or vulnerable to high voltage. This work reports a 1 M dual-salts Localized-High-Concentration-Electrolyte with Fluoroethylene carbonate (FEC) additive. It enables stable cycling of Li||LiNi0.8Co0.1Mn0.1O2 (NMC811) battery, which shows 81.5% capacity retention after 300 cycles with a charge/discharge current density of 1 C and a voltage range of 2.7–4.4 V. Scanning electron microscopy (SEM) images show that this electrolyte not only largely reduced Li dendrites and ‘dead’ Li on anode surface but also well protected the microstructure of NMC811 cathode. Possible components of both solid-electrolyte interlayer (SEI) and cathode-electrolyte interlayer (CEI) were characterized by energy-dispersive X-ray spectroscopy (EDX). The result illustrates that FEC protected Li salts from decomposition on the anode side and suppressed the decomposition of solvents on the cathode side.

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http://hdl.handle.net/10453/178264