Investigating surface area and hydrogen pressure effects on LiH and NaH

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dc.authoridAltuntepe, Ali/0000-0002-6366-4125
dc.authoridOLGAR, MEHMET ALI/0000-0002-6359-8316
dc.authoridZAN, RECEP/0000-0001-6739-4348
dc.authoridCELIK, SELAHATTIN/0000-0002-7306-9784
dc.authoridErkan, Serkan/0000-0001-7249-6701
dc.contributor.authorAltuntepe, Ali
dc.contributor.authorErkan, Serkan
dc.contributor.authorOlgar, Mehmet Ali
dc.contributor.authorCelik, Selahattin
dc.contributor.authorZan, Recep
dc.date.accessioned2024-11-07T13:32:51Z
dc.date.available2024-11-07T13:32:51Z
dc.date.issued2024
dc.departmentNiğde Ömer Halisdemir Üniversitesi
dc.description.abstractNaH and LiH are theoretically capable of storing hydrogen, but several challenges remain to be overcome before they can be widely used for hydrogen storage. In this study, LiH and NaH were ball-milled and the effect of surface area and hydrogen pressure on hydrogen storage capacity was investigated using the solid-state hydrogen storage method. XRD patterns and Raman spectra show significant shifts in main peak positions of LiH and NaH after hydrogen adsorption. BET analysis shows a significant increase in the specific surface area of LiH and NaH from 6.25 m(2)/g to 12.35 m(2)/g and from 1.34 m(2)/g to 2.33 m(2)/g respectively due to ball milling. The FTIR spectra showed more bonds in the 400-1200 cm(-1) fingerprint region after storing hydrogen in LiH and NaH. This suggests structural changes with enhanced bond bending due to hydrogen. At 9 bar pressure, LiH and NaH exhibited excellent hydrogen storage, with ball-milled LiH reaching about 3.55 wt% and 652 sccm, and NaH achieving approximately 1.58 wt% and 291 sccm. These results highlight the significant influence of surface area and hydrogen pressure on hydrogen storage potential. Incorporating the storage potential within the evaluation of PEM fuel cell performance, we suggest that an increased storage capacity directly corresponds to an augmented power density. The analysis of power density over time revealed that the hydrogen adsorbed ball-milled LiH exhibited the highest power density, peaking at 0.075 Wcm(-2) over the long term. In contrast, LiH displayed a lower power density (0.025 Wcm(-2)) while maintaining its long-term performance. The hydrogen adsorbed NaH and hydrogen adsorbed ball-milled NaH displayed power densities 0.050 Wcm(-2) and 0.073 Wcm(-2), respectively, but they showed short-term performance.
dc.description.sponsorshipCouncil of Higher Education (YOK); Scientific and Technological Research Council of Turkey [TUBITAK 122F333]
dc.description.sponsorshipThe author, Ali ALTUNTEPE would like to thank the Council of Higher Education (YOK) for the 100/2000 Ph.D. Scholarship Program. This study was partly supported by The Scientific and Technological Research Council of Turkey (TUBITAK 122F333).
dc.identifier.doi10.1016/j.jssc.2023.124483
dc.identifier.issn0022-4596
dc.identifier.issn1095-726X
dc.identifier.scopus2-s2.0-85179583474
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1016/j.jssc.2023.124483
dc.identifier.urihttps://hdl.handle.net/11480/15654
dc.identifier.volume330
dc.identifier.wosWOS:001140041900001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAcademic Press Inc Elsevier Science
dc.relation.ispartofJournal of Solid State Chemistry
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241106
dc.subjectLiH
dc.subjectNaH
dc.subjectBall milling
dc.subjectHydrogen storage
dc.subjectPEM
dc.subjectFuel cell
dc.titleInvestigating surface area and hydrogen pressure effects on LiH and NaH
dc.typeArticle

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