Amorphous Ti2Ni Alloys Prepared by Mechanical Alloyingand Its Hydrogen Storage Properties
摘 要
以单质钛粉和镍粉为原料, 通过机械合金化的方法制备了非晶态Ti2Ni合金, 采用扫描电镜分析、X射线衍射、差热分析、充放电测试及电位阶跃测试等方法系统研究了Ti2Ni合金粉体的结构变化以及合金电极的储氢性能。结果表明: 随球磨时间的延长, 粉体颗粒尺寸先增大后减小; 球磨至30 h时, 获得了非晶态的Ti2Ni, 随后的球磨使非晶合金粉体的稳定性不断增大; 球磨80 h所得到合金的储氢性能最好, 最大放电容量达到147 mAh·g-1, 循环30次后的容量保持率为92.5%, 氢的扩散系数为2.18×10-11 cm2·s-1。
Abstract
Amorphous Ti2Ni alloys were prepared by mechanical alloying using raw materials of Ti and Ni powders. Scanning electron microscopy, X-ray diffraction, Differential scanning calorimetry, charge/discharge testing and potential step testing were used to study the change of structure and hydrogen storage characteristics of Ti2Ni alloy electrodes. The results show that the particle size of alloy powders increased first and then decreased by the increase of milling time. Amorphous Ti2Ni alloy was formed after milling for 30 h, and the stability of amorphous alloy powders was enhanced by further mechanical milling. The Ti2Ni alloy milled for 80 h exhibited the best hydrogen storage properties, including a maximal discharge capacity of 147 mAh·g-1, a capacity-keeping rate of 92.5% after circulating for 30 times and a diffusion coefficient for hydrogen of 2.18×10-11 cm2·s-1.
中图分类号 TK91
所属栏目 材料性能及其应用
基金项目 江苏省高校自然科学基金资助项目(11KJB430009)
收稿日期 2011/12/30
修改稿日期 2012/10/1
网络出版日期
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备注周俊凤(1987-), 女, 山东烟台人, 硕士研究生。
引用该论文: ZHOU Jun-feng,ZHAO Xiang-yu,LI Jia-jia,MA Li-qun,DING Yi. Amorphous Ti2Ni Alloys Prepared by Mechanical Alloyingand Its Hydrogen Storage Properties[J]. Materials for mechancial engineering, 2013, 37(1): 51~54
周俊凤,赵相玉,李佳佳,马立群,丁毅. 机械合金化制备非晶态Ti2Ni合金及其储氢性能[J]. 机械工程材料, 2013, 37(1): 51~54
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参考文献
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【3】CHEN P, ZHU M. Recent progress in hydrogen storag[J].E Materials Today, 2008, 12(11): 36-43.
【4】NIU H, NORTHWOOD D O. Enhanced electrochemical properties of ball-milled Mg2Ni electrodes[J].International Journal of Hydrogen Energy, 2002, 27(1): 69-77.
【5】ANIK M. Electrochemical hydrogen storage capacities of Mg2Ni and MgNi alloys synthesized by mechanical alloying[J].Journal of Alloys and Compounds, 2010, 491(1/2): 565-570.
【6】ANIK M, AKAY I, O′ZDEMIR G, et al. Electrochemical hydrogen storage performance of Mg-Ti-Zr-Ni alloys[J].International Journal of Hydrogen Energy, 2009, 34(24): 9765-9772.
【7】ANIK M. Improvements of the electrochemical hydrogen storage performance of Mg2Ni by the partial replacements of Mg by Al, Ti and Zr[J].Journal of Alloys and Compounds 2009, 486(1/2): 109-114.
【8】CUI N, LUAN B, ZHAO H J, et al. Synthesis and electrode characteristics of the new composite alloys Mg2Ni-xwt% Ti2Ni [J]. Journal of Alloys and Compounds, 1996, 240(1/2): 229-234.
【9】LUAN B, KENNEDY S-J, LIU H-K, et al. On the charge/discharge behavior of Ti2Ni electrode in 6 M KOH aqueous and deuterium oxide solutions[J].Journal of Alloys and Compounds, 1998, 267(1/2): 224-230.
【10】ZHAO X Y, MA L Q, GOU Y N, et al.Structure, morphology and hydrogen desorption characteristics of amorphous and crystalline Ti-Ni alloys[J]. Materials Science and Engineering A, 2009, 516: 50-53.
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【12】FENG F, NORTHWOOD D O. Improved performance of a metal hydride electrode for nickel/metal hydride batteries through copper-coating[J].Surface and Coatings Technology, 2003, 167(2/3): 263-268.
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