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Lundin, F. (2017) Polysulfide’s impact on physical and electrochemical properties of ionic liquid electrolytes.
BibTeX
@mastersthesis{
Lundin2017,
author={Lundin, Filippa},
title={Polysulfide’s impact on physical and electrochemical properties of ionic liquid electrolytes},
abstract={The Lithium-Sulfur battery is in need of a new safer electrolyte. For this, ionic
liquids are considered a promising candidate. But how does the electrolyte react
when polysulfides (PS) dissolves into it? This thesis investigates how an addition of
PS affect phase transitions, ionic conductivity, mobility and SEI-formation of ionic
liquid electrolytes. In the study the properties of 1-Propyl-1-methyl-pyrrolidinium
Bis(fluorosulfonyl)imide (P13FSI) and 1-Butyl-1-methyl-pyrrolidinium
Bis(trifluoromethanesulfonyl)imide (P14TFSI) with their corresponding anion
lithium salt are compared with and without polysulfide additives. For these ionic
liquid electrolytes the solubility of PS is low, hence the impact of the PS presence
is small.
The phase transitions, investigated by DSC, were found to be unaffected upon addition
of polysulfides for P13FSI based electrolytes, while the crystallisation temperature
increases for P14TFSI based samples when polysulfides are present.The
conductivity increases when PS are present in the P13FSI electrolyte, while for the
P14TFSI electrolyte the conductivity decreases in the presence of PS. From diffusion
coefficients the mobility of all electrolyte components was found to increase upon
addition of PS for P13FSI. In the P14TFSI electrolyte the mobility decreases in the
presence of PS in agreement with the result for the conductivity. From cycling and
impedance data the solid electrolyte interphase (SEI) layer was found to form faster
and found to have a lower resistance with PS than without for the P13FSI electrolyte.
The presence of PS didn’t affect the formation for the P14TFSI electrolyte.
Based on this study the properties of the ionic liquid electrolytes does not change
considerably when PS is introduced, making it a promising candidate as electrolyte
for Lithium-Sulfur batteries.},
year={2017},
keywords={Ionic liquid, Li-S battery, Polysulfides, P13FSI, P14TFSI.},
note={58},
}
RefWorks
RT Generic
SR Electronic
ID 256352
A1 Lundin, Filippa
T1 Polysulfide’s impact on physical and electrochemical properties of ionic liquid electrolytes
YR 2017
AB The Lithium-Sulfur battery is in need of a new safer electrolyte. For this, ionic
liquids are considered a promising candidate. But how does the electrolyte react
when polysulfides (PS) dissolves into it? This thesis investigates how an addition of
PS affect phase transitions, ionic conductivity, mobility and SEI-formation of ionic
liquid electrolytes. In the study the properties of 1-Propyl-1-methyl-pyrrolidinium
Bis(fluorosulfonyl)imide (P13FSI) and 1-Butyl-1-methyl-pyrrolidinium
Bis(trifluoromethanesulfonyl)imide (P14TFSI) with their corresponding anion
lithium salt are compared with and without polysulfide additives. For these ionic
liquid electrolytes the solubility of PS is low, hence the impact of the PS presence
is small.
The phase transitions, investigated by DSC, were found to be unaffected upon addition
of polysulfides for P13FSI based electrolytes, while the crystallisation temperature
increases for P14TFSI based samples when polysulfides are present.The
conductivity increases when PS are present in the P13FSI electrolyte, while for the
P14TFSI electrolyte the conductivity decreases in the presence of PS. From diffusion
coefficients the mobility of all electrolyte components was found to increase upon
addition of PS for P13FSI. In the P14TFSI electrolyte the mobility decreases in the
presence of PS in agreement with the result for the conductivity. From cycling and
impedance data the solid electrolyte interphase (SEI) layer was found to form faster
and found to have a lower resistance with PS than without for the P13FSI electrolyte.
The presence of PS didn’t affect the formation for the P14TFSI electrolyte.
Based on this study the properties of the ionic liquid electrolytes does not change
considerably when PS is introduced, making it a promising candidate as electrolyte
for Lithium-Sulfur batteries.
LA eng
LK http://publications.lib.chalmers.se/records/fulltext/256352/256352.pdf
OL 30