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Superior destabilization effects of LiBH4 with the addition of nano-sized nickel ferrite NiFe2O4

机译：添加纳米级镍铁氧体NiFe2O4，LiBH4具有出色的去稳定作用

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摘要

The introduction of a secondary compound, known as destabilization, is an effective way to improve the desorption performance of LiBH4. In this paper the effects of nano-sized nickel ferrite (NiFe2O4) on the hydrogen storage properties of LiBH4, processed by high energy ball milling, are studied. Non-isothermal desorption results show that the onset and predominant dehydrogenation temperature of LiBH4 + 9 mol% NiFe2O4 is 89 degrees C and 190 degrees C, respectively. This is 226 degrees C and 260 degrees C lower than the fusion and decomposition temperature of LiBH4, respectively. Moreover, over 10 wt% hydrogen can be obtained by 500 degrees C heating, compared with 2.4 wt% for the as-received LiBH4. Additionally, over 5 wt% hydrogen can be released at 300 degrees C within 20 minutes of isothermal desorption. From the X-ray diffraction results and the small area electron diffraction analysis, Fe3O4, NiB and Fe3B, in situ formed between the reaction of LiBH4 and NiFe2O4, and act to give actual destabilization effects.
机译：引入二级化合物（称为去稳定化）是提高LiBH4脱附性能的有效方法。本文研究了纳米铁氧体（NiFe2O4）对高能球磨处理的LiBH4储氢性能的影响。非等温解吸结果表明，LiBH4 + 9 mol％NiFe2O4的起始脱氢温度和主要脱氢温度分别为89摄氏度和190摄氏度。这分别比LiBH4的熔化和分解温度低226摄氏度和260摄氏度。此外，相比于原样的LiBH4为2.4重量％，通过500摄氏度的加热可获得超过10重量％的氢。另外，在等温解吸的20分钟内，可以在300摄氏度下释放超过5 wt％的氢。从X射线衍射结果和小面积电子衍射分析可知，LiBH4与NiFe2O4的反应原位形成了Fe3O4，NiB和Fe3B，起到了实际的去稳定作用。

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