【作者】 侯鹏翔； 徐士涛； 杨全红； 刘敏； 刘畅； 成会明；

【Author】 Hou pengxiang Up shitao Yang quanhong Liu min Liuchang ChenghuimingShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P.R. China

【机构】 中国科学院金属研究所；

【摘要】 本文对由流动催化剂法热解有机物制备并提纯后平均直径为5.7nm的多壁纳米碳管进行了储氢实验研究。结果表明:在室温及高压条件下,样品的重量储氢能力由提纯前的2 wt％升高到6.5 wt％。经提纯并压块后,多壁纳米碳管的重量储氢能力和体积储氢能力可分别达到6.3％和31.6kg/m~3。与提纯后未经压块的样品比较,块状样品的重量储氢能力没有明显的变化,这一结果表明较高的机械压力对多壁纳米碳管的储氢能力几乎没有影响。更多还原

【Abstract】 The as-prepared and purified multi-walled carbon nanotubes (MWNTs) with an average diameter of 5.7 nm synthesized by the floating catalyst method were employed for hydrogen storage measurements. The hydrogen storage capacity of the purified samples increased to 6.5 wt% from 2 wt% of the raw materials. Then the purified MWNTs were cold-compacted into a cylinder for volumetric hydrogen storage measurements. The gravimetric and volumetric hydrogen storage capacities of the bulk sample reach 6.3 wt% and 31.6 kg/m3 at room temperature under a pressure of 145 atmospheres, respectively. The bulk one shows a similar gravimetric hydrogen storage capacity (6.3 wt%) to unshaped purified MWNTs (6.5 wt%). It implied that compaction under high pressure exerts little effect on the hydrogen storage capacity of MWNTs.更多还原