Controlled prelithiation of PbS to Pb/Li₂S for high initial Coulombic efficiency in lithium ion batteries

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dc.contributor.advisorMullins, C. B.
dc.creatorGuo, Yong, M.A.
dc.creator.orcid0000-0002-5361-1476
dc.date.accessioned2019-09-06T20:43:23Z
dc.date.available2019-09-06T20:43:23Z
dc.date.created2018-12
dc.date.issued2018-12
dc.date.submittedDecember 2018
dc.date.updated2019-09-06T20:43:23Z
dc.description.abstractPbS nanoparticle aggregates were synthesized in a simple aqueous reaction at room temperature, and were tested as a lithium ion anode material, with a gravimetric capacity of 374 mAh/g at C/2, and a 0.15% capacity loss per cycle. However, its half cell initial Coulombic efficiency (ICE) was only 40%, due to a combination of irreversible Li₂S and solid electrolyte interface (SEI) formations. A custom controlled prelithiation technique was then applied to the PbS electrodes, converting the active material to Pb/Li₂S, and consolidating the SEI prior to coin cell assembly. This brought the ICE from 40% to >97%, and allowed for immediate cycling of the electrode at high Coulombic efficiency, without further formation cycles. Upon construction of prelithiated Pb/Li₂S vs NCM full cells, an 82% ICE was observed, with the majority of the lithium loss from the NCM. The full cells had a combined electrode capacity of 100 mAh/g at C/2
dc.description.departmentChemistry
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/2152/75745
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/2847
dc.language.isoen
dc.subjectLithium ion batteries
dc.subjectAnodes
dc.subjectPrelithiation
dc.subjectFull cells
dc.subjectLead
dc.titleControlled prelithiation of PbS to Pb/Li₂S for high initial Coulombic efficiency in lithium ion batteries
dc.typeThesis
dc.type.materialtext
thesis.degree.departmentChemistry
thesis.degree.disciplineChemistry
thesis.degree.grantorThe University of Texas at Austin
thesis.degree.levelMasters
thesis.degree.nameMaster of Arts

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