Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1605125 | Journal of Alloys and Compounds | 2016 | 5 Pages |
Abstract
LiBH4 is considered a promising hydrogen storage material for automotive applications; however, its usage is limited because of unfavorable reversibility and sluggish kinetics. In this paper, we have improved the hydrogen storage properties of LiBH4 by doping with a porous Li3BO3 additive, which was prepared by a solid state synthesis method. The LiBH4-33 wt% Li3BO3 composite was prepared via mechanical milling. The composite exhibited an acceptable hydrogenation/dehydrogenation rate, high hydrogen storage capacity and superior reversibility. The initial dehydrogenation temperature of the composite was 105 °C, which is 205 °C lower than that of the pristine LiBH4, and the hydrogen desorption capacity was 4.12 wt% at 450 °C within 2000 s. The composite maintained its hydrogen absorption capacity of 2.8 wt% with a narrow gap after 5 de/hydrogenation cycles at 400 °C and 5.0 MPa. The Li3BO3 additive clearly enhanced the hydrogen storage properties of LiBH4 and facilitated the decomposition and formation of [BH4]â, thus accelerating de/rehydrogenation of LiBH4. At the same time, Li3BO3 offered numerous porous channels that enhanced hydrogen circulation.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yufei Ma, Yuan Li, Ting Liu, Xin Zhao, Lu Zhang, Shumin Han, Yijing Wang,