Effect of nano-sized Ce2S3 on reversible hydrogen storage properties of LiBH4. (10th August 2016)

• Record Type: Journal Article
• Authors: Wang, Jiasheng; Wang, Zhibin; Li, Yuan; Ke, Dandan; Lin, Xiaozhu; Han, Shumin; Ma, Mingzhen
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 30(2016)
• Page Start: 13156
• Page End: 13162
• Publication Date: 2016-08-10
• Subjects: Lithium borohydride -- Cerium sulfide -- Reversibility -- Hydrogen storage properties; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.06.061
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Ce2 S3 with a diameter ca. 100–200 nm was synthesized by a solvothermal method and doped into LiBH4 . Ce2 S3 reacts with LiBH4, forming Li2 S and CeB6 as the dehydrogenated products, and they become active substances in the re-hydrogenation reaction to improve the reversibility of the LiBH4 system. The composite of LiBH4 with 20 wt.% Ce2 S3 exhibits favorable re-hydrogenation ability, its hydrogen absorption still reaches 3.6 wt.% at the 4th cycle. After dehydrogenation, The initial dehydrogenation temperature of the LiBH4 + 20 wt.% Ce2 S3 composite is decreased to 250 °C, which is 80 °C lower than that of the pristine LiBH4 system. Furthermore, within 3000 s, the LiBH4 + 20 wt.% Ce2 S3 composite can release about 4.0 wt.% hydrogen at 400 °C, which is 1.67 times higher than that of the pristine LiBH4 . The activation energy ( E a ) of dehydrogenation reaction of LiBH4 is reduced from 181.80 kJ/mol to 157.82 kJ/mol. Highlights: A novel nano-sized Ce3 S3 was synthesized and doped into LiBH4 . LiBH4 + 20 wt.% Ce3 S3 exhibits favorable re-hydrogenation ability at the 4th cycle. LiBH4 + 20 wt.% Ce3 S3 onset dissociation temperature was 80 °C lower than LiBH4 . The generated Li2 S and CeB6 have co-catalytic effects to the re-hydrogenation.