Show simple item record

dc.contributor.advisorMishra, Brajendra
dc.contributor.authorMarinos, Danai
dc.date.accessioned2007-01-03T07:49:37Z
dc.date.accessioned2022-02-09T09:03:13Z
dc.date.available2007-01-03T07:49:37Z
dc.date.available2022-02-09T09:03:13Z
dc.date.issued2014
dc.date.submitted2014
dc.identifierT 7644
dc.identifier.urihttp://hdl.handle.net/11124/16982
dc.description2014 Fall.
dc.descriptionIncludes illustrations (some color).
dc.descriptionIncludes bibliographical references (pages 170-178).
dc.description.abstractLithium ion batteries are one of the most commonly used batteries. A large amount of these have been used over the past 25 years and the use is expected to rise more due to their use in automotive batteries. Lithium ion batteries cannot be disposed into landfill due to safety reasons and cost. Thus, over the last years, there has been a lot of effort to find ways to recycle lithium ion batteries. A lot of valuable materials are present in a lithium ion battery making their recycling favorable. Many attempts, including pyrometallurgical and hydrometallurgical methods, have been researched and some of them are already used by the industry. However, further improvements are needed to the already existing processes, to win more valuable materials, use less energy and be more environmentally benign. The goal of this thesis is to find a low-temperature, low-energy method of recovering lithium from the electrolyte and to develop pathways for complete recycling of the battery. The research consists of the following parts: Pure LiPF6 powder, which is the electrolyte material, was characterized using x-ray diffraction analysis and DSC/TGA analysis. The LiPF6 powder was titrated using acid (HCl, HNO3, H2SO4), bases (NH4OH) and distilled water. It was concluded that distilled water was the best solvent to selectively leach lithium from lithium-ion batteries. Leaching conditions were optimized including time, temperature, solid/liquid ratio and stirring velocity. All the samples were tested using ICP for chemical composition. Because leaching could be performed at room temperature, leaching was conducted in a flotation machine that was able to separate plastics by creating bubbles with no excess reagents use. The solution that contained lithium had to be concentrated more in order for lithium to be able to precipitate and it was shown that the solution could be concentrated by using the same solution over and over again. The next set of experiments was composed of battery shredding, steel separation by hand magnet, leaching with distilled water and sizing using wet sieving. Every fraction was sent to rare-earth rolls separation and eddy current separation. A size distribution analysis was conducted and the fractions were analyzed using ICP .
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2014 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjectflotation cell
dc.subjecteddy-current
dc.subjectrecycling
dc.subjectmineral processing
dc.subjectlithium-ion batteries
dc.subjectleaching
dc.subject.lcshLithium ion batteries
dc.subject.lcshLithium ion batteries -- Recycling
dc.subject.lcshLeaching
dc.subject.lcshFlotation
dc.subject.lcshSeparation (Technology)
dc.subject.lcshRecycling industry
dc.titleApproach to beneficiation of spent lithium-ion batteries for recovery of materials, An
dc.typeText
dc.contributor.committeememberAnderson, Corby G.
dc.contributor.committeememberSpiller, D. Erik
thesis.degree.nameMaster of Science (M.S.)
thesis.degree.levelMasters
thesis.degree.disciplineMetallurgical and Materials Engineering
thesis.degree.grantorColorado School of Mines


Files in this item

Thumbnail
Name:
Marinos_mines_0052N_10573.zip
Size:
41.13Mb
Format:
Unknown
Description:
Data
Thumbnail
Name:
Marinos_mines_0052N_10573.pdf
Size:
55.66Mb
Format:
PDF
Description:
Thesis

This item appears in the following Collection(s)

Show simple item record