Improved hydrogen storage reversibility of LiBH4 destabilized by Y(BH4)3 and YH3

Microstructural Characterization of Dehydrogenated Products of the LiBH4-YH3 Composite

“…3b). This is consistent with the result of Gennari (2012) who observed that the nanostructured LiBH 4 -YH 3 composite exhibited a relatively good dehydrogenation-rehydrogenation cycle performance. Since it is hard to directly obtain an electron diffraction pattern of LiH, which is also one of the dehydrogenation reaction products, due to its high reactivity with air during sample transport to a TEM and its light weight compared with YB 4 , EELS was employed to identify LiH in the sample.…”

Tuning LiBH4 for Hydrogen Storage: Destabilization, Additive, and Nanoconfinement Approaches

“…The reversibility of pristine LiBH 4 demands harsh conditions (>600 • C and >100 bar H 2 ) [1,41], which makes it impossible for its direct use as a hydrogen storage medium for practical applications. Several investigations have been done heading towards thermodynamic destabilization and kinetic improvement of LiBH 4 [29,30,39,46,49,50,53,[58][59][60][61][62][63][64][65][66][67]69,[72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87][89][90][91][92][93][94][95][96][97][98][99].…”

“…Among the possible metal hydrides tested to destabilize LiBH 4 , the rare earth (RE) metal hydrides constitute an attractive group of compounds due to the improvements in the theoretical thermodynamic parameters respect to pure LiBH 4 decomposition as well as in the LiBH 4 dehydrogenation kinetics [54,83,[89][90][91][92][93][94][95][96][97][98][99]. Considering that several RE hydrides are not commercially available, three different approaches have been used to produce these hydrides (See Table 6) and to form in the following step the based-LiBH 4 destabilized composites.…”

“…Following this, Gennari explored the in situ formation of YH 2+x by the milling of 4LiBH 4 -YCl 3 plus 3LiH. The dehydrogenation behavior was improved by the reduction of the decomposition temperature of LiBH 4 , showing 80% of hydrogen storage reversibility [95]. The hydrogen backpressure affects LiBH 4 dehydrogenation: its increase favors the YB 4 formation and suppresses the formation of diborane.…”

Recent progress on LiBH<sub>4</sub> as promising high hydrogen storage material

“…然而, 氢背 压的高低对反应路径影响有不同的报道 [17,36,37] , 高至 5.5 bar [35] , 低至 0.01 bar [17] (3) LiBH 4 -金 属 氢 化 物 体 系 的 纳 米 尺 寸 效 应 . Gennari [40] [43] . 3LiBH 4 -TiF 3 体系的放氢反应则生成 LiF、TiB 2 和 B 等物相并释放 5.9 wt%的氢气, 其吸氢反应形成新的 金属硼氢化物, 可逆放氢量仅有 4 wt% [48] .…”