Dual Additives for Stabilizing Li Deposition and SEI Formation in Anode-Free Li-Metal Batteries

Wu, B; Chen, C; Danilov, DL; Chen, Z; Jiang, M; Eichel, RA; Notten, PHL

Dual Additives for Stabilizing Li Deposition and SEI Formation in Anode-Free Li-Metal Batteries

Wu, B Chen, C Danilov, DL Chen, Z Jiang, M Eichel, RA Notten, PHL

Permalink

Publisher:: Wiley Open Access
Publication Type:: Journal Article
Citation:: Energy and Environmental Materials, 2024, 7, (3)
Issue Date:: 2024-01-01

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

Adobe PDF

Download Published versionAdobe PDF (2.88 MB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Wu, B
dc.contributor.author	Chen, C
dc.contributor.author	Danilov, DL
dc.contributor.author	Chen, Z
dc.contributor.author	Jiang, M
dc.contributor.author	Eichel, RA
dc.contributor.author	Notten, PHL
dc.date.accessioned	2024-11-07T00:53:55Z
dc.date.available	2024-11-07T00:53:55Z
dc.date.issued	2024-01-01
dc.identifier.citation	Energy and Environmental Materials, 2024, 7, (3)
dc.identifier.issn	2575-0348
dc.identifier.issn	2575-0356
dc.identifier.uri	http://hdl.handle.net/10453/181786
dc.description.abstract	Anode-free Li-metal batteries are of significant interest to energy storage industries due to their intrinsically high energy. However, the accumulative Li dendrites and dead Li continuously consume active Li during cycling. That results in a short lifetime and low Coulombic efficiency of anode-free Li-metal batteries. Introducing effective electrolyte additives can improve the Li deposition homogeneity and solid electrolyte interphase (SEI) stability for anode-free Li-metal batteries. Herein, we reveal that introducing dual additives, composed of LiAsF6 and fluoroethylene carbonate, into a low-cost commercial carbonate electrolyte will boost the cycle life and average Coulombic efficiency of NMC\|\|Cu anode-free Li-metal batteries. The NMC\|\|Cu anode-free Li-metal batteries with the dual additives exhibit a capacity retention of about 75% after 50 cycles, much higher than those with bare electrolytes (35%). The average Coulombic efficiency of the NMC\|\|Cu anode-free Li-metal batteries with additives can maintain 98.3% over 100 cycles. In contrast, the average Coulombic efficiency without additives rapidly decline to 97% after only 50 cycles. In situ Raman measurements reveal that the prepared dual additives facilitate denser and smoother Li morphology during Li deposition. The dual additives significantly suppress the Li dendrite growth, enabling stable SEI formation on anode and cathode surfaces. Our results provide a broad view of developing low-cost and high-effective functional electrolytes for high-energy and long-life anode-free Li-metal batteries.
dc.language	en
dc.publisher	Wiley Open Access
dc.relation.ispartof	Energy and Environmental Materials
dc.relation.isbasedon	10.1002/eem2.12642
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	4004 Chemical engineering
dc.subject.classification	4011 Environmental engineering
dc.title	Dual Additives for Stabilizing Li Deposition and SEI Formation in Anode-Free Li-Metal Batteries
dc.type	Journal Article
utslib.citation.volume	7
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2024-11-07T00:53:54Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	7
utslib.citation.issue	3

Abstract:

Anode-free Li-metal batteries are of significant interest to energy storage industries due to their intrinsically high energy. However, the accumulative Li dendrites and dead Li continuously consume active Li during cycling. That results in a short lifetime and low Coulombic efficiency of anode-free Li-metal batteries. Introducing effective electrolyte additives can improve the Li deposition homogeneity and solid electrolyte interphase (SEI) stability for anode-free Li-metal batteries. Herein, we reveal that introducing dual additives, composed of LiAsF6 and fluoroethylene carbonate, into a low-cost commercial carbonate electrolyte will boost the cycle life and average Coulombic efficiency of NMC||Cu anode-free Li-metal batteries. The NMC||Cu anode-free Li-metal batteries with the dual additives exhibit a capacity retention of about 75% after 50 cycles, much higher than those with bare electrolytes (35%). The average Coulombic efficiency of the NMC||Cu anode-free Li-metal batteries with additives can maintain 98.3% over 100 cycles. In contrast, the average Coulombic efficiency without additives rapidly decline to 97% after only 50 cycles. In situ Raman measurements reveal that the prepared dual additives facilitate denser and smoother Li morphology during Li deposition. The dual additives significantly suppress the Li dendrite growth, enabling stable SEI formation on anode and cathode surfaces. Our results provide a broad view of developing low-cost and high-effective functional electrolytes for high-energy and long-life anode-free Li-metal batteries.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/181786