Ti基准晶复相材料电极的电化学储氢性能  

Electrochemical Hydrogen Storage Properties of Ti-Based Quasicrystalline Composite Materials

作　　者：刘万强[1,2] 张姗姗[1,2] 王立民[2] 

机构地区：[1]长春理工大学材料科学与工程学院,长春130022 [2]中国科学院长春应用化学研究所稀土资源利用国家重点实验室,长春130022

出　　处：《应用化学》2011年第12期1402-1407,共6页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金青年基金资助项目(510020015)

摘　　要：通过电弧熔炼和铜辊急冷技术分别制得Ti1.4V0.6Ni准晶材料和V5Ti9Zr26.2Ni38Cr3.5Co1.5Mn15.6Al0.4Sn0.8(VTZN)合金材料,再用球磨法得到Ti1.4V0.6Ni+20%(质量分数)VTZN的复相材料,研究了该复相材料的组织和电化学储氢特性。结果表明,复相材料的相组成包括正二十面体准晶相(I-phase)、面心立方相(FCC)和体心立方相(BCC)。复相材料作为镍氢电池负极,在303 K和放电电流密度为30 mA/g条件下,最大放电容量可达310 mA.h/g,放电性能优于Ti1.4V0.6Ni合金负极。The Ti1.4V0.6Ni and V5Ti9Zr26.2Ni38Cr3.5Co1.5Mn15.6Al0.4Sn0.8（VTZN） alloys were prepared via an arc-melting method followed by the melt-spinning technique.We systematically investigated the structures and electrochemical hydrogen storage performances of Ti1.4V0.6Ni＋20%（mass fraction） ball-milled VTZN composite materials.It was found that the icosahedral quasicrystal,FCC（Ti2Ni） and BCC structural solid solution coexisted in the resultant composite material.When using such composite materials as Ni-MH battery anodes,the discharge current densities were about 30 mA/g at 303 K,the maximal electrochemical discharge capacity reaches 310 mA·h/g.In addition,the electrode of Ti1.4V0.6Ni and VTZN composite showed high-rate discharge ability compared with that of Ti1.4V0.6Ni.

关 键 词：Ti1.4V0.6Ni合金 准晶 复相材料 电化学 储氢 

分 类 号：O614[理学—无机化学]