Promoted hydrogen release from 3LiBH4/MnF2 composite by doping LiNH2: Elimination of diborane release and reduction of decomposition temperature

Song, Yun; Fang, Fang; Li, Yongtao; Zhao, Qiyang; Sun, Dalin; Zhang, Qingan; Ouyang, Liuzhang; Zhu, Min

doi:10.1016/j.ijhydene.2012.09.029

Cited by 4 publications

(1 citation statement)

References 27 publications

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“…The intensity ratios of the MS H 2 /B 2 H 6 signal up to 200 • C are 5198, 5001, and 4456 for samples 1, 2, and 3, respectively. Apparently, the LiNH 2 additive is a very potent suppressor of B 2 H 6 , as already reported by Song et al [12] for a LiBH 4 /MnF 2 mixture upon its thermal decomposition. The same effect of LiNH 2 is confirmed for the first time for a mechanochemically reacted system of (2NaBH 4 + MnCl 2 ).…”

Section: Amorphous A-mn(bh 4 ) 2 -Type Hydride After Mechanochemical supporting

confidence: 77%

The Effects of Additives on the Dehydrogenation of Amorphous Manganese Borohydride and Its Crystalline Form after Solvent Filtration/Extraction

et al. 2017

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Abstract:A non-stoichiometric, amorphous a-Mn(BH 4 ) (2x) hydride, accompanied by a NaCl-type salt, was mechanochemically synthesized from the additive-free mixture of (2NaBH 4 + MnCl 2 ), as well as from the mixtures containing the additives of ultrafine filamentary carbonyl nickel (Ni), graphene, and LiNH 2 . It is shown that both graphene and LiNH 2 suppressed the release of B 2 H 6 during thermal gas desorption, with the LiNH 2 additive being the most effective suppressor of B 2 H 6 . During solvent filtration and extraction of additive-free, as well as additive-bearing, (Ni and graphene) samples from diethyl ether (Et 2 O), the amorphous a-Mn(BH 4 ) (2x) hydride transformed into a crystalline c-Mn(BH 4 ) 2 hydride, exhibiting a microstructure containing nanosize crystallites (grains). In contrast, the LiNH 2 additive most likely suppressed the formation of a crystalline c-Mn(BH 4 ) 2 hydride during solvent filtration/extraction. In a differential scanning calorimeter (DSC), the thermal decomposition peaks of both amorphous a-Mn(BH 4 ) (2x) and crystalline c-Mn(BH 4 ) 2 were endothermic for the additive-free samples, as well as the samples with added graphene and Ni. The samples with LiNH 2 exhibited an exothermic DSC decomposition peak.

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Section: Amorphous A-mn(bh 4 ) 2 -Type Hydride After Mechanochemical supporting

confidence: 77%