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Kang, Seok Ju
Smart Materials for Energy Lab.
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Fluoroethylene Carbonate-Based Electrolyte with 1 M Sodium Bis(fluorosulfonyl)imide Enables High-Performance Sodium Metal Electrodes

Author(s)
Lee, YongwonLee, JaegiLee, JeongminKim, KoeunCha, AmingKang, SujinWi, TaeungKang, Seok JuLee, Hyun-WookChoi, Nam-Soon
Issued Date
2018-05
DOI
10.1021/acsami.8b02446
URI
https://scholarworks.unist.ac.kr/handle/201301/24217
Fulltext
https://pubs.acs.org/doi/10.1021/acsami.8b02446
Citation
ACS APPLIED MATERIALS & INTERFACES, v.10, no.17, pp.15270 - 15280
Abstract
Sodium (Na) metal anodes with stable electro-chemical cycling have attracted widespread attention because of their highest specific capacity and lowest potential among anode materials for Na batteries. The main challenges associated with Na metal anodes are dendritic formation and the low density of deposited Na during electrochemical plating. Here, we demonstrate a fluoroethylene carbonate (FEC)-based electrolyte with 1 M sodium bis(fluorosulfonyl)imide (NaFSI) salt for the stable and dense deposition of the Na metal during electrochemical cycling. The novel electrolyte combination developed here circumvents the dendritic Na deposition that is one of the primary concerns for battery safety and constructs the uniform ionic interlayer achieving highly reversible Na plating/stripping reactions. The FEC NaFSI constructs the mechanically strong and ion-permeable interlayer containing NaF and ionic compounds such as Na2CO3 and sodium alkylcarbonates.
Publisher
AMER CHEMICAL SOC
ISSN
1944-8244
Keyword (Author)
sodium metal electrodefluoroethylene carbonateinterfacein situ optical microscopyin situ differential electrochemical mass spectrometry
Keyword
NA-ION BATTERIESROOM-TEMPERATURELITHIUM-IONENERGY-STORAGEETHYLENE CARBONATESURFACELIINTERPHASEANODEDECOMPOSITION

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