Advanced Electrolyte for Lithium-Sulfur Batteries

Authors

Natalia Rodrigues de OliveiraFollow

Document Type

Thesis

Degree

Master of Science (MS)

Major/Program

Materials Science and Engineering

First Advisor's Name

Bilal El-Zahab

First Advisor's Committee Title

Committee chair

Second Advisor's Name

Norman Munroe

Second Advisor's Committee Title

Committee member

Third Advisor's Name

Chunlei (Peggy) Wang

Third Advisor's Committee Title

Committee member

Keywords

Lithium-sulfur battery, additive electrolyte, benzenedithiol, high C-rate, optimization of Li metal anode, electric vehicles.

Date of Defense

3-31-2023

Abstract

With the growing concerns around carbon emissions in the atmosphere, the decarbonization of transportation has been regarded as one of the main ways to eliminate or reduce emissions. Electric Vehicles (EVs) adoption has accelerated in recent years; however, problems associated with their batteries affect their range, cost, and access to battery materials. Lithium-sulfur batteries (LiSBs) have major advantages over lithium-ion batteries, especially in specific energy (Wh/kg) and cost ($/kWh).

This thesis demonstrates the performance and utility of soluble electrolyte additives in LiSBs and provides a new design to improve their electrochemical performance. The main studied additive, 1,4-benzenedithiol (1,4-BDT), presents an attractive mechanism with the LiSB material, which showed a stable electrode/electrolyte interface, reducing the impact of polysulfide diffused from the cathode on the anode. Cells assembled using 100 mM of 1,4-BDT improved the capacity retention performance and imparted the anode with improved stability over the first 100 cycles.

Identifier

FIDC011092

Recommended Citation

Rodrigues de Oliveira, Natalia, "Advanced Electrolyte for Lithium-Sulfur Batteries" (2023). FIU Electronic Theses and Dissertations. 5240.
https://digitalcommons.fiu.edu/etd/5240