Ti_(0.25)V_(0.3)Cr_(0.4)Mn_(0.05)-La_(0.67)Mg_(0.33)Ni_(3.0)的复合贮氢材料制备及贮氢性能研究  

Preparation of hydrogen storage composite Ti_(0.25)V_(0.3)Cr_(0.4)Mn_(0.05)-La_(0.67)Mg_(0.33)Ni_(3.0) and investigation of its hydrogen storage performance

作　　者：王大辉[1] 徐广胜[1] 罗永春[1] 康龙[1] 闫汝煦[1] 

机构地区：[1]兰州理工大学材料科学与工程学院

出　　处：《兰州理工大学学报》2006年第6期20-23,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省中青年科学基金(YS031-A21-008)

摘　　要：采用机械合金化制备了复合贮氢材料Ti0.25V0.3Cr0.4Mn0.05-La0.67Mg0.33Ni3.0.X-ray衍射表明:Ti0.25V0.3Cr0.4Mn0.05-La0.67Mg0.33Ni3.0复合材料为bcc结构,与Ti0.25V0.3Cr0.4Mn0.05合金衍射图谱相比,该复合材料衍射峰的衍射强度明显降低并宽化.吸放氢研究表明,Ti0.25V0.3Cr0.4Mn0.05-La0.67Mg0.33Ni3.0复合材料易于活化,在3.5MPa、室温下经过26 h即可活化,但合金贮氢量没有明显改变.电化学性能研究表明:该复合材料具有很好的电化学循环稳定性能,300次循环容量仍保持在93%.Hydrogen storage composite Ti0.25V0.3Cr0.4Mn0.05-La0.67Mg0.33Ni3.0 was prepared by means of mechanical alloying. It was shown by its X-ray diffraction tha.t this composite had bee structure and, compared with the diffraction spectrum, the diffraction intensity of its diffraction peak was remarkably reduced and width-widened. It was also shown by the investigation of gaseous adsorption and release of hydrogen from this composite that this composite was easily to be activated, so that the necessary time for its activation was only 26 h under the condition of 3. 5 MPa and indoor temperature without evident variation of hydrogen storage amount with this composite. It was further shown by the investigation of electrochemical performance that this composite possessed fine stability of electrochemical cycling, so that its storage capacity remained 93% after 300 cycles.

关 键 词：机械合金化 Ti0.25V0.3Cr0.4Mn0.05-La0.67Mg0.33Ni3.0 复合贮氢材料 贮氢性能 

分 类 号：TG146.4[一般工业技术—材料科学与工程]