Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 46, Issue 1, Pages 852-864Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.09.177
Keywords
Mg(BH4)(2); LiBH4; Nanoconfinement; Hollow carbon nanospheres
Categories
Funding
- National Key R&D Program of China [2018YFB1502104]
- National Natural Science Foundation of China [U2030208, 52071286]
- Open Fund of the Guangdong Provincial Key Laboratory of Advance Energy Storage Materials
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The study revealed that the LMBH@HCNS composites exhibit significantly improved dehydrogenation properties, with high actual dehydrogenation amounts and fast hydrogen desorption rates. After three cycles, the reversible hydrogen storage capacity increased without obvious degradation.
Novel porous hollow carbon nanospheres (HCNS) have been synthesized and utilized as scaffold for LiBH4-Mg(BH4)(2) eutectic borohydride (LMBH). Large loading amounts of LMBH (33, 50 and 67 wt%) have been melt-infiltrated into HCNS, and the significantly improved dehydrogenation properties have been discovered. The LMBH@HCNS composites not only exhibit high actual dehydrogenation amounts and fast hydrogen desorption rates, but also an increased reversible hydrogen storage capacities after three cycles without obvious degradation. Further structural tests have revealed that the over-infiltrated LMBH covering the spherical surface of HCNS could also contribute to the improved hydrogen storage behaviors, due to a strong interfacial adhesion effect that avoid LMBH from aggregation during de/rehydrogenation cycles. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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