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A nanoconfined-LiBH4 system using a unique multifunctional porous scaffold of carbon wrapped ultrafine Fe3O4 skeleton for reversible hydrogen storage with high capacity

Journal Article


Abstract


  • LiBH4 with a capacity of 18.5 wt% H2, is a promising high-capacity hydrogen storage material; however, it suffers from high operation temperature and poor reversibility. Herein, a novel structural LiBH4 system prepared via a nanoconfinement technique, coupling with in-situ introduced catalysts, is developed. By using a unique passionfruit-like porous hybrid composed of carbon wrapped ultrafine Fe3O4 skeleton (p-Fe3O4@C) as scaffold, synergetic effects of nanoconfinement, catalysis and surface destablization are achieved, which significantly improve the overall hydrogen storage properties of LiBH4. With an optimized LiBH4 loading of 60 wt%, the confined system initiates dehydrogenation at a low temperature of 175 °C and rapidly desorbs 7.8 wt% H2 at 350 °C within 30 min. Moreover, the dehydrogenated system shows a high reversibility under relatively moderate hydrogenation conditions. A dehydrogenation capacity of 6.2 wt% remains after 20 cycles. The system can be flexibly compacted, showing a volumetric hydrogen density as high as 79.4 g L−1, where there is almost no dehydrogenation property deterioration compared with its powder counterpart. The present work provides new insights in developing advanced complex hydride-based hydrogen storage systems through functional and structural designs.

Publication Date


  • 2022

Citation


  • Wang, S., Gao, M., Yao, Z., Liu, Y., Wu, M., Li, Z., . . . Pan, H. (2022). A nanoconfined-LiBH4 system using a unique multifunctional porous scaffold of carbon wrapped ultrafine Fe3O4 skeleton for reversible hydrogen storage with high capacity. Chemical Engineering Journal, 428. doi:10.1016/j.cej.2021.131056

Scopus Eid


  • 2-s2.0-85110055778

Web Of Science Accession Number


Volume


  • 428

Abstract


  • LiBH4 with a capacity of 18.5 wt% H2, is a promising high-capacity hydrogen storage material; however, it suffers from high operation temperature and poor reversibility. Herein, a novel structural LiBH4 system prepared via a nanoconfinement technique, coupling with in-situ introduced catalysts, is developed. By using a unique passionfruit-like porous hybrid composed of carbon wrapped ultrafine Fe3O4 skeleton (p-Fe3O4@C) as scaffold, synergetic effects of nanoconfinement, catalysis and surface destablization are achieved, which significantly improve the overall hydrogen storage properties of LiBH4. With an optimized LiBH4 loading of 60 wt%, the confined system initiates dehydrogenation at a low temperature of 175 °C and rapidly desorbs 7.8 wt% H2 at 350 °C within 30 min. Moreover, the dehydrogenated system shows a high reversibility under relatively moderate hydrogenation conditions. A dehydrogenation capacity of 6.2 wt% remains after 20 cycles. The system can be flexibly compacted, showing a volumetric hydrogen density as high as 79.4 g L−1, where there is almost no dehydrogenation property deterioration compared with its powder counterpart. The present work provides new insights in developing advanced complex hydride-based hydrogen storage systems through functional and structural designs.

Publication Date


  • 2022

Citation


  • Wang, S., Gao, M., Yao, Z., Liu, Y., Wu, M., Li, Z., . . . Pan, H. (2022). A nanoconfined-LiBH4 system using a unique multifunctional porous scaffold of carbon wrapped ultrafine Fe3O4 skeleton for reversible hydrogen storage with high capacity. Chemical Engineering Journal, 428. doi:10.1016/j.cej.2021.131056

Scopus Eid


  • 2-s2.0-85110055778

Web Of Science Accession Number


Volume


  • 428