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将无烟煤进行脱灰和碳化,制备微晶碳,再将微晶碳和铝添加到镁中,用氢气反应球磨法制取镁/碳纳米复合储氢材料。用透射电子显微镜、选区电子衍射、X射线衍射和差示扫描量热分析对储氢材料的粒度、晶体结构和放氢温度进行了测定。结果表明,微晶碳是镁粉的高效助磨剂,添加40%(质量分数)的微晶碳,球磨3h,即可将镁磨至20~40nm;添加微晶碳和铝能降低储氢材料的放氢温度;微晶碳具有类似石墨结构,较易磨至纳米级,层片之间能够储氢。
Anthracite de-ashing and carbonization, the preparation of microcrystalline carbon, then microcrystalline carbon and aluminum added to magnesium, hydrogen reaction ball milling magnesium / carbon nanocomposite hydrogen storage material. The particle size, crystal structure and hydrogen evolution temperature of the hydrogen storage material were measured by transmission electron microscopy, selected area electron diffraction, X-ray diffraction and differential scanning calorimetry. The results show that microcrystalline carbon is an efficient grinding aid for magnesium powder. When 40% (mass fraction) microcrystalline carbon is added, the magnesium can be milled to 20-40 nm after ball milling for 3h. Adding microcrystalline carbon and aluminum can reduce hydrogen storage Material discharge temperature; microcrystalline carbon has a similar graphite structure, easier to mill to nanoscale, between the layers can store hydrogen.