Novel polymerized ionic liquid for solid polymer electrolyte application

Goldhoorn, Reinier (2023) Novel polymerized ionic liquid for solid polymer electrolyte application. Master's Thesis / Essay, Chemical Engineering.

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Abstract

Block co-polymers have recently drawn more attention for potential application as solid polymer electrolytes (SPE) in metal anode lithium-ion batteries. Their nature to self-assemble into a supra- molecular structure could mean that the soft conductive and hard structural parts could be a best of both worlds for conductivity of ions and the structural strength to prevent dendrite formation. In this research PSt-b-PEGMA-r-AMPS-b-PSt, polymerized with protonated Et3N and neutralized with LiOH, has been synthesized using RAFT-polymerization and tested for application on ionic conductivity for potential SPE application in lithium-ion batteries. Here, the influence of AMPS as a embedded anionic part within the polymer backbone is investigated based on the ratio of AMPS to PEGMA and also the possibility to neutralize the AMPS with LiOH in MQ-water. For all the produced polymers, the PSt parts have the same size due to the utilization of the DMAcTTC-RAFT-agent which made propagation from the middle possible. Electrochemical impedance spectroscopy (EIS) was then applied on two polymers to find the correlation of [EO]:[Li+] and temperature to the ionic conductivity. PSt27-b-PEGMA156-r-AMPS54-b-PSt27 was found to have the highest conductivity of 8.720×10−7 S cm−1 at 115◦C with a [EO]:[Li+] of 30:1.

Item Type:	Thesis (Master's Thesis / Essay)
Supervisor name:	Raffa, P. and Kyriakou, V. and Guzik, A.
Degree programme:	Chemical Engineering
Thesis type:	Master's Thesis / Essay
Language:	English
Date Deposited:	26 Jun 2023 09:56
Last Modified:	26 Jun 2023 09:56
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/30085

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