Thermal properties of Y(BH4)3 synthesized via two different methods

Title
Thermal properties of Y(BH4)3 synthesized via two different methods
Authors
박기호이현숙Arndt Remhof이영수Yigang Yan김민영김선진Andreas Zuettel조영환
Keywords
Hydrogen storage; Yttrium borohydride; In situ X-ray diffraction; Melt infiltration
Issue Date
2013-07
Publisher
International journal of hydrogen energy
Citation
VOL 38, NO 22, 9263-9270
Abstract
Y(BH4)3 is one of the candidates for solid-state hydrogen storage, which contains 9.06 wt% of hydrogen. In this study, the thermal properties of Y(BH4)3 synthesized via two different methods are extensively examined. One method relies on the solidesolid metathesis reaction between LiBH4 and YCl3, and the other method is the gas-solid reaction between B2H6 and YH3. The two samples are studied by differential scanning calorimetry, thermogravimetry, and X-ray diffraction. They exhibit distinctly different polymorphic phase transformation and melting. It turns out that the side product LiCl in the metathesis reaction, which has been regarded as being inert, shifts the melting point and promotes the formation of YB4 during decomposition. Differential scanning calorimetry and in situ X-ray diffraction data indicate that the addition of LiBH4 to Y(BH4)3 induces co-melting as is found in the cases of LiBH4eCa(BH4)2 or LiBH4eMg(BH4)2. Melt infiltration of Y(BH4)3 into mesoporous carbon cage confirms such melting behavior.
URI
http://pubs.kist.re.kr/handle/201004/45127
ISSN
03603199
Appears in Collections:
KIST Publication > Article
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