Rehydrogenation and cycle studies of LiBH4-CaH2 composite

Jae Hag Lim; Jae Hyeok Shim; Young Su Lee; Jin Yoo Suh; Young Whan Cho; Joonho Lee

doi:10.1016/j.ijhydene.2010.04.046

Rehydrogenation and cycle studies of LiBH₄-CaH₂ composite

Jae Hag Lim, Jae Hyeok Shim, Young Su Lee, Jin Yoo Suh, Young Whan Cho, Joonho Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

Rehydrogenation behavior of 6LiBH₄ + CaH₂ composite with NbF₅ has been studied between 350 and 500 °C after dehydrogenation at 450 °C. The composite exhibits the best rehydrogenation feature at 450 °C in terms of the overall rehydrogenation rate and the amount of absorbed hydrogen. It is found that about 9 wt% hydrogen is absorbed at 450 °C for 12 h. Up to 10 dehydrogenation-hydrogenation cycles have been carried out for the composite. It is demonstrated that 6LiBH₄ + CaH₂ with 15 wt% NbF₅ maintains a reversible hydrogen storage capacity of about 6 wt% at 450 °C after a slight degradation between the 1st and 5th cycles. The addition of NbF₅ seems to improve the cycle properties by retarding microstructural coarsening during cycles.

Original language	English
Pages (from-to)	6578-6582
Number of pages	5
Journal	International Journal of Hydrogen Energy
Volume	35
Issue number	13
DOIs	https://doi.org/10.1016/j.ijhydene.2010.04.046
Publication status	Published - 2010 Jul

Keywords

Cycle
Destabilization
Hydrogen storage
Lithium borohydride
Rehydrogenation

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ijhydene.2010.04.046

Cite this

@article{cad3dce18cff45009a113d1c1bf764f0,

title = "Rehydrogenation and cycle studies of LiBH4-CaH2 composite",

abstract = "Rehydrogenation behavior of 6LiBH4 + CaH2 composite with NbF5 has been studied between 350 and 500 °C after dehydrogenation at 450 °C. The composite exhibits the best rehydrogenation feature at 450 °C in terms of the overall rehydrogenation rate and the amount of absorbed hydrogen. It is found that about 9 wt% hydrogen is absorbed at 450 °C for 12 h. Up to 10 dehydrogenation-hydrogenation cycles have been carried out for the composite. It is demonstrated that 6LiBH4 + CaH2 with 15 wt% NbF5 maintains a reversible hydrogen storage capacity of about 6 wt% at 450 °C after a slight degradation between the 1st and 5th cycles. The addition of NbF5 seems to improve the cycle properties by retarding microstructural coarsening during cycles.",

keywords = "Cycle, Destabilization, Hydrogen storage, Lithium borohydride, Rehydrogenation",

author = "Lim, {Jae Hag} and Shim, {Jae Hyeok} and Lee, {Young Su} and Suh, {Jin Yoo} and Cho, {Young Whan} and Joonho Lee",

note = "Funding Information: This study has been sponsored by the Hydrogen Energy R&D Center, one of 21st Century Frontier R&D Programs funded by the Ministry of Education, Science and Technology of Korea .",

year = "2010",

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doi = "10.1016/j.ijhydene.2010.04.046",

language = "English",

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T1 - Rehydrogenation and cycle studies of LiBH4-CaH2 composite

AU - Lim, Jae Hag

AU - Shim, Jae Hyeok

AU - Lee, Young Su

AU - Suh, Jin Yoo

AU - Cho, Young Whan

AU - Lee, Joonho

N1 - Funding Information: This study has been sponsored by the Hydrogen Energy R&D Center, one of 21st Century Frontier R&D Programs funded by the Ministry of Education, Science and Technology of Korea .

PY - 2010/7

Y1 - 2010/7

N2 - Rehydrogenation behavior of 6LiBH4 + CaH2 composite with NbF5 has been studied between 350 and 500 °C after dehydrogenation at 450 °C. The composite exhibits the best rehydrogenation feature at 450 °C in terms of the overall rehydrogenation rate and the amount of absorbed hydrogen. It is found that about 9 wt% hydrogen is absorbed at 450 °C for 12 h. Up to 10 dehydrogenation-hydrogenation cycles have been carried out for the composite. It is demonstrated that 6LiBH4 + CaH2 with 15 wt% NbF5 maintains a reversible hydrogen storage capacity of about 6 wt% at 450 °C after a slight degradation between the 1st and 5th cycles. The addition of NbF5 seems to improve the cycle properties by retarding microstructural coarsening during cycles.

AB - Rehydrogenation behavior of 6LiBH4 + CaH2 composite with NbF5 has been studied between 350 and 500 °C after dehydrogenation at 450 °C. The composite exhibits the best rehydrogenation feature at 450 °C in terms of the overall rehydrogenation rate and the amount of absorbed hydrogen. It is found that about 9 wt% hydrogen is absorbed at 450 °C for 12 h. Up to 10 dehydrogenation-hydrogenation cycles have been carried out for the composite. It is demonstrated that 6LiBH4 + CaH2 with 15 wt% NbF5 maintains a reversible hydrogen storage capacity of about 6 wt% at 450 °C after a slight degradation between the 1st and 5th cycles. The addition of NbF5 seems to improve the cycle properties by retarding microstructural coarsening during cycles.

KW - Cycle

KW - Destabilization

KW - Hydrogen storage

KW - Lithium borohydride

KW - Rehydrogenation

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DO - 10.1016/j.ijhydene.2010.04.046

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