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Article: In Situ Introduction of Li3BO3 and NbH Leads to Superior Cyclic Stability and Kinetics of a LiBH4-Based Hydrogen Storage System

TitleIn Situ Introduction of Li3BO3 and NbH Leads to Superior Cyclic Stability and Kinetics of a LiBH4-Based Hydrogen Storage System
Authors
KeywordsLiBH4
hydrogen storage
kinetics
cyclic stability
reversibility catalysis
Issue Date2020
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/aamick
Citation
ACS Applied Materials & Interfaces, 2020, v. 12 n. 1, p. 893-903 How to Cite?
AbstractLiBH4 is a high-capacity hydrogen storage material; however, it suffers from high dehydrogenation temperature and poor reversibility. To tackle those issues, we introduce a new LiBH4-based system with in situ formed superfine and well-dispersed Li3BO3 and NbH as co-reactants. Those are synthesized by the addition of niobium ethoxide [Nb(OEt)5] to LiBH4, heat treatment of the mixture, and then hydrogenation, where Li3BO3 and NbH are generated from the reaction of Nb(OEt)5 and LiBH4. After optimization, the system with a normalized composition of LiBH4-0.04(Li3BO3 + NbH) in molar fraction shows superior hydrogen storage reversibility and kinetics. The initial and main dehydrogenation temperatures of the system are 200 and 90 °C lower than those of the pristine LiBH4, respectively, and 8.2 wt % H2 is released upon heating to 400 °C. A capacity of 7.2 wt % H2, corresponding to a capacity retention of 91%, is sustained after 30 cycles in an isothermal cyclic regime of dwelling at 400 °C for 60 min for dehydrogenation and dwelling at 500 °C and 50 bar H2 pressure for 20 min for hydrogenation. Such a high cyclic stability for a LiBH4-based system has never been reported to date. The in situ introduced Li3BO3 and NbH have a synergistic catalysis effect on the improvement of the hydrogen storage performance of LiBH4, showing highly effective bidirectional action on both dehydrogenation and hydrogenation.
Persistent Identifierhttp://hdl.handle.net/10722/290126
ISSN
2023 Impact Factor: 8.3
2023 SCImago Journal Rankings: 2.058
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, Z-
dc.contributor.authorGao, M-
dc.contributor.authorGu, J-
dc.contributor.authorXian, K-
dc.contributor.authorYao, Z-
dc.contributor.authorShang, C-
dc.contributor.authorLiu, Y-
dc.contributor.authorGuo, Z-
dc.contributor.authorPan, H-
dc.date.accessioned2020-10-22T08:22:28Z-
dc.date.available2020-10-22T08:22:28Z-
dc.date.issued2020-
dc.identifier.citationACS Applied Materials & Interfaces, 2020, v. 12 n. 1, p. 893-903-
dc.identifier.issn1944-8244-
dc.identifier.urihttp://hdl.handle.net/10722/290126-
dc.description.abstractLiBH4 is a high-capacity hydrogen storage material; however, it suffers from high dehydrogenation temperature and poor reversibility. To tackle those issues, we introduce a new LiBH4-based system with in situ formed superfine and well-dispersed Li3BO3 and NbH as co-reactants. Those are synthesized by the addition of niobium ethoxide [Nb(OEt)5] to LiBH4, heat treatment of the mixture, and then hydrogenation, where Li3BO3 and NbH are generated from the reaction of Nb(OEt)5 and LiBH4. After optimization, the system with a normalized composition of LiBH4-0.04(Li3BO3 + NbH) in molar fraction shows superior hydrogen storage reversibility and kinetics. The initial and main dehydrogenation temperatures of the system are 200 and 90 °C lower than those of the pristine LiBH4, respectively, and 8.2 wt % H2 is released upon heating to 400 °C. A capacity of 7.2 wt % H2, corresponding to a capacity retention of 91%, is sustained after 30 cycles in an isothermal cyclic regime of dwelling at 400 °C for 60 min for dehydrogenation and dwelling at 500 °C and 50 bar H2 pressure for 20 min for hydrogenation. Such a high cyclic stability for a LiBH4-based system has never been reported to date. The in situ introduced Li3BO3 and NbH have a synergistic catalysis effect on the improvement of the hydrogen storage performance of LiBH4, showing highly effective bidirectional action on both dehydrogenation and hydrogenation.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/aamick-
dc.relation.ispartofACS Applied Materials & Interfaces-
dc.subjectLiBH4-
dc.subjecthydrogen storage-
dc.subjectkinetics-
dc.subjectcyclic stability-
dc.subjectreversibility catalysis-
dc.titleIn Situ Introduction of Li3BO3 and NbH Leads to Superior Cyclic Stability and Kinetics of a LiBH4-Based Hydrogen Storage System-
dc.typeArticle-
dc.identifier.emailGuo, Z: zxguo@hku.hk-
dc.identifier.authorityGuo, Z=rp02451-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acsami.9b19287-
dc.identifier.pmid31820909-
dc.identifier.scopuseid_2-s2.0-85077438327-
dc.identifier.hkuros317081-
dc.identifier.volume12-
dc.identifier.issue1-
dc.identifier.spage893-
dc.identifier.epage903-
dc.identifier.isiWOS:000507146100087-
dc.publisher.placeUnited States-
dc.identifier.issnl1944-8244-

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