Formation and hydrogen storage properties of dual-cation (Li, Ca) borohydride

Zhan Zhao Fang; Xiang Dong Kang; Jun Hong Luo; Ping Wang; Hai Wen Li; Shin Ichi Orimo

doi:10.1021/jp109260g

Formation and hydrogen storage properties of dual-cation (Li, Ca) borohydride

Zhan Zhao Fang, Xiang Dong Kang, Jun Hong Luo, Ping Wang, Hai Wen Li, Shin Ichi Orimo

Advanced Institute for Materials Research (AIMR)

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

33 Citations (Scopus)

Abstract

Lithium borohydride, LiBH₄, possesses high hydrogen capacity, but cannot be used for hydrogen storage owing to the problematic H-exchange kinetics and thermodynamics. In the present study, we employed the Li ⁺-Ca²⁺ combination strategy to improve the de/rehydrogenation properties of LiBH₄. Our study found that mechanically milling 1:1 LiBH₄/Ca(BH₄)₂ mixture formed a dual-cation borohydride, Li_0.9Ca(BH₄) _2.9, which then transformed to stoichiometric LiCa(BH ₄)₃ in the heating process. The formation and decomposition behaviors of LiCa(BH₄)₃ were studied using X-ray diffraction and thermogravimetry/differential scanning calorimetry/mass spectroscopy techniques. It was found that LiCa(BH₄)₃ differs significantly from the component phases in terms of physical properties, decomposition behaviors, and mechanistic pathway. In particular, LiCa(BH ₄)₃ exhibits improved de/rehydrogenation properties relative to the component phases. These experimental findings exemplified the effectiveness of manipulation of dual-cation combination in tuning the de/rehydrogenation properties of the ionic light-metal borohydrides.

Original language	English
Pages (from-to)	22736-22741
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	114
Issue number	51
DOIs	https://doi.org/10.1021/jp109260g
Publication status	Published - 2010 Dec 30

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Formation and hydrogen storage properties of dual-cation (Li, Ca) borohydride",

abstract = "Lithium borohydride, LiBH4, possesses high hydrogen capacity, but cannot be used for hydrogen storage owing to the problematic H-exchange kinetics and thermodynamics. In the present study, we employed the Li +-Ca2+ combination strategy to improve the de/rehydrogenation properties of LiBH4. Our study found that mechanically milling 1:1 LiBH4/Ca(BH4)2 mixture formed a dual-cation borohydride, Li0.9Ca(BH4) 2.9, which then transformed to stoichiometric LiCa(BH 4)3 in the heating process. The formation and decomposition behaviors of LiCa(BH4)3 were studied using X-ray diffraction and thermogravimetry/differential scanning calorimetry/mass spectroscopy techniques. It was found that LiCa(BH4)3 differs significantly from the component phases in terms of physical properties, decomposition behaviors, and mechanistic pathway. In particular, LiCa(BH 4)3 exhibits improved de/rehydrogenation properties relative to the component phases. These experimental findings exemplified the effectiveness of manipulation of dual-cation combination in tuning the de/rehydrogenation properties of the ionic light-metal borohydrides.",

author = "Fang, {Zhan Zhao} and Kang, {Xiang Dong} and Luo, {Jun Hong} and Ping Wang and Li, {Hai Wen} and Orimo, {Shin Ichi}",

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AU - Fang, Zhan Zhao

AU - Kang, Xiang Dong

AU - Luo, Jun Hong

AU - Wang, Ping

AU - Li, Hai Wen

AU - Orimo, Shin Ichi

PY - 2010/12/30

Y1 - 2010/12/30

N2 - Lithium borohydride, LiBH4, possesses high hydrogen capacity, but cannot be used for hydrogen storage owing to the problematic H-exchange kinetics and thermodynamics. In the present study, we employed the Li +-Ca2+ combination strategy to improve the de/rehydrogenation properties of LiBH4. Our study found that mechanically milling 1:1 LiBH4/Ca(BH4)2 mixture formed a dual-cation borohydride, Li0.9Ca(BH4) 2.9, which then transformed to stoichiometric LiCa(BH 4)3 in the heating process. The formation and decomposition behaviors of LiCa(BH4)3 were studied using X-ray diffraction and thermogravimetry/differential scanning calorimetry/mass spectroscopy techniques. It was found that LiCa(BH4)3 differs significantly from the component phases in terms of physical properties, decomposition behaviors, and mechanistic pathway. In particular, LiCa(BH 4)3 exhibits improved de/rehydrogenation properties relative to the component phases. These experimental findings exemplified the effectiveness of manipulation of dual-cation combination in tuning the de/rehydrogenation properties of the ionic light-metal borohydrides.

AB - Lithium borohydride, LiBH4, possesses high hydrogen capacity, but cannot be used for hydrogen storage owing to the problematic H-exchange kinetics and thermodynamics. In the present study, we employed the Li +-Ca2+ combination strategy to improve the de/rehydrogenation properties of LiBH4. Our study found that mechanically milling 1:1 LiBH4/Ca(BH4)2 mixture formed a dual-cation borohydride, Li0.9Ca(BH4) 2.9, which then transformed to stoichiometric LiCa(BH 4)3 in the heating process. The formation and decomposition behaviors of LiCa(BH4)3 were studied using X-ray diffraction and thermogravimetry/differential scanning calorimetry/mass spectroscopy techniques. It was found that LiCa(BH4)3 differs significantly from the component phases in terms of physical properties, decomposition behaviors, and mechanistic pathway. In particular, LiCa(BH 4)3 exhibits improved de/rehydrogenation properties relative to the component phases. These experimental findings exemplified the effectiveness of manipulation of dual-cation combination in tuning the de/rehydrogenation properties of the ionic light-metal borohydrides.

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Formation and hydrogen storage properties of dual-cation (Li, Ca) borohydride

Abstract

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