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Preparation and Properties of Mg-Based Hydrogen Storage Materials

Author: ZhangWenJuan
Tutor: YangXiuYun
School: Changchun University of Science and Technology
Course: Inorganic Chemistry
Keywords: Mg-based alloys replace diffusion method electrochemical properties Hydrogen storage
CLC: TG139.7
Type: Master's thesis
Year: 2009
Downloads: 310
Quote: 1
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Abstract


Mg2Ni and Mg2-xRExNi（RE=La:x = 0.1,0.2,0.3 at%,RE=Nd:x = 0.1 at%） alloys was synthesized by replace diffusion method.The properties of electrochemical charge/discharge hydrogen of the alloys and the hydrogen diffusion action of Mg2Ni electrode were investigated.The grain size of the Mg2Ni is about 100nm,specific surface area is 30m2/g,and the phase structure is mainly composed of Mg2Ni and little amount of MgO.The phase structure of Mg2-xLaxNi is constituted with LaNi5、LaNi2.28、La7Ni3 and MgNi2.The hydrogen storage capacity of the alloys electrode is enhanced after addition rare earth.When addition of 0.1%La,the hydrogen storage effect is improved considerably,the maximum capacity is 112 mAh/g at 30℃,it is enhanced about 30%compare to the Mg2Ni. The hydrogen storage capacity of containing La alloy electrode decreased with increasing of increasing La content（x）,but the cycle stability is improved.The cycle stability of containing Nd alloy electrode is better.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > The alloy learn with a variety of properties of alloys > Other special nature of the alloy > Hydrogen storage alloy
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