Evaluation of hydrogenation properties on MgHx-transition metal fluoride composites by planetary ball milling

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• 作者：Min-Hyuk Jang ; So-Hyun Park ; Whan-Gi Kim…
• 关键词：mechanical alloying/milling ; hydrogen ; grain boundary ; metals ; hydrogen absorbing materials
• 刊名：Metals and Materials International
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：21
• 期：6
• 页码：1118-1122
• 全文大小：580 KB
• 参考文献：1.M. Y. Song, S. H. Baek, J.-L. Bobet, and H. R. Park, Met. Mater. Int. 19, 237 (2013).CrossRef
  2.M. Y. Song, Y. J. Kwak, S. H. Lee, and H. R. Park, Korean J. Met. Mater. 52, 1031 (2014).
  3.S. H. Hong and M. Y. Song, Met. Mater. Int. 19, 1145 (2013).CrossRef
  4.M. Kirnheim, S. Doppiu, G. barkhordarian, U. Boesenherg, T. Klassen, O. Gutfleish, and R. Bormann, Scripta Mater. 56, 841 (2007).CrossRef
  5.M. J. Kim and I. H. Seo, X-ray Diffraction Analysis, pp. 254-56, Ban-Do Publishing Company, Korea (1998).
  6.S.-A. Jin, J.-H. Shim, Y. W. Cho, and K.-W. Yi, J. Power Sources, 172, 859 (2007).CrossRef
  7.Z. G. Huang, Z. P. Guo. A. Calka, D. Wexler, C. Lukey, and H. K. Liu, J. Alloy Compd. 422, 299 (2006).CrossRef
  8.D. Legut and U. D. Wdowik, Acta Phys. Pol. A, 126, 1 (2014).CrossRef
  9.Y. Zhang, J. Wu, L. Chan, J. Wang, S. Xue, and Z. Li, Int. J. Coal Geol. 120, 41 (2013).CrossRef
  10.F. Feng, M. Geng, and D. O. Northwood, Comp. Mater. Sci. 23, 291 (2002).CrossRef
  11.Y. Song, Z. X. Guo, and R. Yang, Mat. Sci. Eng. A-Struct, 365, 73 (2004).CrossRef
  
• 作者单位：Min-Hyuk Jang (1)
  So-Hyun Park (1)
  Whan-Gi Kim (2)
  Tae-Whan Hong (1)
  
  1. Department of Materials Science and Engineering/Research Center for ECo-Devices and Materials (ReSEM), Korea National University of Transportation, Chungju, 380-702, Korea
  2. Department of Applied Chemistry, Konkuk University, Chungju, 380-701, Korea
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Metallic Materials
  Operating Procedures and Materials Treatment
  
• 出版者：The Korean Institute of Metals and Materials, co-published with Springer Netherlands
• ISSN：2005-4149

文摘

To improve the disadvantages of Mg hydrides, a few studies were conducted for MgH_x intermixed with transition metal fluorides. MgF2 formed from the MgH_x-transition metal fluoride system can be replaces the initial surface oxide layer and provides a reactive and protective fluorinated surface for for hydrogen uptake. Thus, the absorption/desorption kinetics will be enhanced. In this research, MgH_x-transition metal fluoride composites mixture has been prepared by hydrogen induced planetary ball milling. The synthesized powders were characterized by X-ray diffraction analysis, scanning electron microscopy and simultaneous thermogravimetric, differential scanning calorimetric analysis. The hydrogenation behaviors were evaluated by using a sievert’s type automatic pressure-composition-temperature apparatus without any activation treatment. From the characteristics of the absorption kinetics and curves observed, the role of transition metal fluoride was catalyst in hydrogen absorption. The results of Pressure-Composition Isotherm curve, available hydrogen storage amount for MgH_x-5 vol% CoF₂ composites were 4.85 wt%, for MgH_x-5 vol%TiF₃ composites were 4.88 wt%. at 623K in the 5th cycle. Keywords mechanical alloying/milling hydrogen grain boundary metals hydrogen absorbing materials