Enhanced hydrogen storage properties of the 2LiBH4–MgH2 composite with BaTiO3 as an additive. Issue 16 (18th March 2016)

• Record Type: Journal Article
• Authors: Wang, Jiasheng; Han, Shumin; Wang, Zhibin; Ke, Dandan; Liu, Jingjing; Ma, Mingzhen
• Is Part Of: Dalton transactions. Volume 45:Issue 16(2016)
• Page Start: 7042
• Page End: 7048
• Publication Date: 2016-03-18
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c6dt00045b
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The 2LiBH4 –MgH2 + 20 wt% BaTiO3 composite was prepared by ball-milling LiBH4, MgH2 and BaTiO3, and the effect of BaTiO3 on the hydrogen storage properties of the composite was investigated. Abstract : The 2LiBH4 –MgH2 + 20 wt% BaTiO3 composite was prepared by ball-milling LiBH4, MgH2 and BaTiO3, and the effect of BaTiO3 on the hydrogen storage properties of the composite was investigated. TG-DSC results show that the onset dehydrogenation temperature of the composite is 299 °C, which is 124 °C lower than that of 2LiBH4 –MgH2, and the dehydrogenation amount of the composite increases from 6.86 wt% to 7.48 wt% at 500 °C. Kinetic tests show that the dehydrogenation amount of 2LiBH4 –MgH2 + 20 wt% BaTiO3 reaches 1.5 wt% within 400 seconds, almost 10 times that of 2LiBH4 –MgH2 . BaTiO3 reacts with LiBH4 during the dehydrogenation of the composite and generates BaB6 and TiO2 . BaB6 is beneficial to lower the stability of LiBH4, while TiO2 has a catalytic effect in improving the hydrogenation/dehydrogenation kinetics of the reaction between Mg and LiBH4 .