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Anion effect on lithium electrodeposition from N‐propyl‐N‐methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid electrolytes

Basile, Andrew, Bhatt, Anand I. and O'Mullane, Anthony P. 2016, Anion effect on lithium electrodeposition from N‐propyl‐N‐methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid electrolytes, Electrochimica Acta, vol. 215, pp. 19-28, doi: 10.1016/j.electacta.2016.08.075.

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Title Anion effect on lithium electrodeposition from N‐propyl‐N‐methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid electrolytes
Formatted title Anion effect on lithium electrodeposition from N‐propyl‐N‐methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid electrolytes
Author(s) Basile, AndrewORCID iD for Basile, Andrew orcid.org/0000-0001-5552-9591
Bhatt, Anand I.
O'Mullane, Anthony P.
Journal name Electrochimica Acta
Volume number 215
Start page 19
End page 28
Total pages 10
Publisher Elsevier
Place of publication Doetinchem, The Netherlands
Publication date 2016-10-10
ISSN 0013-4686
1873-3859
Keyword(s) room temperature ionic liquid
cyclic voltammetry
nucleation and growth
electrodeposition
chronoamperometry
Summary The electrodeposition of lithium metal from room temperature ionic liquid (RTIL) electrolytes consisting of N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (Pyr13[FSI]) with LiFSI, LiTFSI, LiBF4, LiPF6 or LiAsF6 salts onto Pt and Li electrodes was undertaken to identify mechanistic details. Cyclic voltammetry at both Pt and Li electrodes is complicated by the chemical reaction between fresh/electrodeposited Li metal and electrolyte to form a solid-electrolyte interphase (SEI). As such, all electrolyte systems depict quasi-reversible cycling, owing to the concomitant chemical breakdown of the electrolyte and deposition of a passivation product onto the electrode surface. The rate at which the SEI forms can be observed through cyclic voltammetric scan rate studies. Chronoamperometry data supports the cyclic voltammetry studies and indicates that an instantaneous nucleation and growth type mechanism is taking place at all potentials as determined through modelling the current-time transients utilising the Hills-Scharifker theory. We show herein that these RTIL based electrolytes can be cycled effectively in an order of stability of salt inclusion as follows: LiBF4 > LiFSI > LiAsF6 > LiTFSI > LiPF6.
Language eng
DOI 10.1016/j.electacta.2016.08.075
Field of Research 030102 Electroanalytical Chemistry
030604 Electrochemistry
030299 Inorganic Chemistry not elsewhere classified
030301 Chemical Characterisation of Materials
090403 Chemical Engineering Design
029999 Physical Sciences not elsewhere classified
Socio Economic Objective 861201 Coated Metal and Metal-Coated Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30086664

Document type: Journal Article
Collection: Institute for Frontier Materials
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