Publication:
Guide to water free lithium bis(oxalate) borate (LiBOB)

dc.contributor.coauthorZor, Ceren
dc.contributor.coauthorAfyon, Semih
dc.contributor.departmentDepartment of Chemistry
dc.contributor.departmentGraduate School of Sciences and Engineering
dc.contributor.departmentKUBAM (Koç University Boron and Advanced Materials Application and Research Center)
dc.contributor.kuauthorHaciu, Durata
dc.contributor.kuauthorSomer, Mehmet Suat
dc.contributor.kuauthorSubaşı, Yaprak
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.contributor.schoolcollegeinstituteResearch Center
dc.date.accessioned2024-11-09T12:42:24Z
dc.date.issued2021
dc.description.abstractLithium bis(oxalate) borate, LiB(C2O4)(2) (LiBOB), is one of the most important electrolyte additives for Li-ion batteries (LIBs) due to its numerous advantages such as thermal stability, good solubility in organic solvents, high conductivity, and low cost as well as providing safer operations with superior electrochemical performance compared to conventional electrolyte combinations. However, the use of LiBOB is limited due to slight instability issues under ambient conditions that might require extra purification steps and result in poorer performances in real systems. Here, we address some of these issues and report a high purity water free LiBOB synthesized with fewer processing steps, employing lithium carbonate, oxalic acid, and boric acid as low-cost starting materials, and via ceramic processing methods under protective atmosphere. The physical and chemical characterizations of both anhydrous and monohydrate phases are performed with X-ray powder diffraction (XRPD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and scanning electron microscopy (SEM) analyses to determine the degree of the purity and the formation of impurities, such as LiBOB center dot H2O, HBO2, and Li2C2O4, as a result of the aging investigations where the as-synthesized salt was exposed to ambient conditions for different durations. Differential thermal analysis (DTA) is applied to determine the optimum synthesis conditions for anhydrous LiBOB and to analyze the water loss and the decomposition of LiBOB center dot H2O. Aging experiments with the water free LiBOB are carried out to evaluate the effect of humidity on the phase changes and resulting impurities under various conditions. The detrimental effect of even slightest humidity conditions is shown, and protective measures during and after the synthesis of LiBOB are discussed. Anhydrous LiBOB could be widely used as an electrolyte additive to improve the overall electrochemical performances for LIBs through development of a protective solid electrolyte interface (SEI) on the surface of high voltage cathodes and by bringing about superior electrochemical properties with increased cycling stability, rate capability, and Coulombic efficiency, if synthesized, purified, and handled properly before use in real electrochemical systems.
dc.description.fulltextYES
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue21
dc.description.openaccessYES
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.sponsorshipNational Boron Research Institute (BOREN)
dc.description.versionAuthor's final manuscript
dc.description.volume125
dc.identifier.doi10.1021/acs.jpcc.1c01437
dc.identifier.eissn1932-7455
dc.identifier.embargoNO
dc.identifier.filenameinventorynoIR03236
dc.identifier.issn1932-7447
dc.identifier.quartileQ2
dc.identifier.scopus2-s2.0-85108293947
dc.identifier.urihttps://hdl.handle.net/20.500.14288/2307
dc.identifier.wos661114000002
dc.keywordsChemical characterization
dc.keywordsDifferential thermal analyses (DTA)
dc.keywordsElectrochemical performance
dc.keywordsElectrochemical systems
dc.keywordsElectrolyte additives
dc.keywordsHigh voltage cathode
dc.language.isoeng
dc.publisherAmerican Chemical Society (ACS)
dc.relation.grantno2018-31-07-15-003
dc.relation.ispartofJournal of Physical Chemistry C
dc.relation.urihttp://cdm21054.contentdm.oclc.org/cdm/ref/collection/IR/id/10013
dc.subjectChemistry
dc.subjectScience and technology
dc.subjectMaterials science
dc.titleGuide to water free lithium bis(oxalate) borate (LiBOB)
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorHaciu, Durata
local.contributor.kuauthorSubaşı, Yaprak
local.contributor.kuauthorSomer, Mehmet Suat
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1College of Sciences
local.publication.orgunit1Research Center
local.publication.orgunit2KUBAM (Koç University Boron and Advanced Materials Application and Research Center)
local.publication.orgunit2Department of Chemistry
local.publication.orgunit2Graduate School of Sciences and Engineering
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