作　　者： ; ; ; ; ; ;

机构地区： 广东工业大学

出　　处： 《稀有金属材料与工程》 2005年第4期609-611,共3页

摘　　要： 采用LaNi_5稀土合金作为催化剂,用化学气相沉积法(CVD)制备了碳纳米管。研究了含有5%碳纳米管的LaNi5_稀土合金电极样品的电化学性能。测定了碳纳米管电极的电化学储氢性能。实验发现:含有碳纳米管的LaNi5_稀土合金的电化学放电容量更高,当放电电流密度为100mA/g时,其电化学储氢量高达385mAh/g。其循环寿命也得到了较大改善。循环100次,放电容量仅下降15%。 The electrochemical properties of doped 5% carbon nanotubes(CNTs) LaNi5 electrode have been investigated. The CNTs were synthesized by chemical vapor deposition method (CVD) using lanthanum nickel alloy(LaNi5) as the catalyst. Three-electrode system was introduced to test the electrochemical hydrogen storage behaviors of CNTs with Ni(OH)(2)/NiOOH as the assistant electrode and Hg/HgO as the reference electrode. 6mol/L KOH was used as the electrolyte, and the high discharge capacity was measured of 385 mAh/g at a discharge current of 100 mA/g. The doped 5% CNTs LaNi5 electrodes showed higher electrochemical hydrogen storage capacities and a longer cycle life than those of the un-droped CNTs. In addition, the discharge capacity decay was only 15% after 100 cycles.

关 键 词： 碳纳米管 储氢合金 电化学性能

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]