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用快淬技术制备了名义成分为Mg2Ni1-xCox(x=0、、0.1、0.2、0.3、0.4)的贮氢合金.获得长度连续,厚度约为30μm,宽度约为25mm的快淬合金薄带.用XRD、HRTEM表征了快淬态合金薄带的微观结构,用自动控制的Sieverts设备测试了合金的吸放氢动力学性能.用程控电池测试仪测定了合金薄带的电化学贮氢动力学.用电化学工作站测试了快淬薄带的交流阻抗谱(EIS)和Tafel极化曲线,测试了电位阶跃后的阳极电流与时间相应曲线,并计算了氢在合金中的扩散系数(D).结果表明,快淬态合金具有纳米晶/非晶结构,且非晶化程度随淬速的增加而增加.此外,快淬处理显著地提高舍金的贮氢动力学,当淬速从0m/s(铸态被定义为淬速0m/s)增加到30m/s时,快淬态(x=0.3)合金在5min内的吸氢饱和率(Ra5)从81.9%增加到94.7%,20min的放氢率(Ra20)从34.9%增加到57.3%,氢扩散系数(D)从7.24×1012cm2/s增加到3.66×10-11cm2/s,极限电流密度(IL)从121.7mA/g增加到880.7mA/g.

参考文献

[1] Jain I P;Lal C;Jain A .[J].International Journal of Hydrogen Energy,2010,35:5133-5144.
[2] Zhao X Y;Ma L Q .[J].International Journal of Hydrogen Energy,2009,34:4788-4796.
[3] Kwon S N;Baek S H;Mumm D R et al.[J].International Journal of Hydrogen Energy,2008,33:4586-4592.
[4] Huang L J;Tang J G;Wang Y et al.[J].Journal of Alloys and Compounds,2009,485:186-191.
[5] Janot R;Darok X;Rougier A et al.[J].Journal of Alloys and Compounds,2005,404-406:293-296.
[6] Xie L;Liu Y;Zhang X Z et al.[J].Journal of Alloys and Compounds,2009,482:388-392.
[7] Liang G .[J].Journal of Alloys and Compounds,2004,370:123-128.
[8] Song M Y;Kwon S N;Bae J S et al.[J].International Journal of Hydrogen Energy,2008,33:1711-1718.
[9] Huang L J;Liang G Y;Sun Z B et al.[J].Journal of Power Sources,2006,160:684-687.
[10] Tanaka K;Kanda Y;Furuhashi M et al.[J].Journal of Alloys and Compounds,1999,293-295:521-525.
[11] Spassov T.;Koster U. .Thermal stability and hydriding properties of nanocrystalline melt-spun Mg63Ni30Y7 alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(2):279-286.
[12] Yamaura S I;Kim H Y;Kimura H et al.[J].Journal of Alloys and Compounds,2002,339:230-235.
[13] Williamson G K;Hall W H .[J].Acta Metallurgica,1953,1:22-31.
[14] Inoue A;Masumoto T .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1993,173:1-8.
[15] Chen H S .[J].Acta Metallurgica,1974,22(12):1505-1511.
[16] Wu Y;Han W;Zhou S X et al.[J].Journal of Alloys and Compounds,2008,466:176-181.
[17] Zheng G.;White RE.;Popov BN. .ELECTROCHEMICAL DETERMINATION OF THE DIFFUSION COEFFICIENT OF HYDROGEN THROUGH AN LANI4.25AL0.75 ELECTRODE IN ALKALINE AQUEOUS SOLUTION[J].Journal of the Electrochemical Society,1995(8):2695-2698.
[18] Lee D S;Kwon I H;Bobet J L et al.[J].Journal of Alloys and Compounds,2004,366:279-288.
[19] Takahashi Y;Yukawa H;Morinaga M .[J].Journal of Alloys and Compounds,1996,242:98-107.
[20] Gasiorowski A;Iwasieczko W;Skoryna D et al.[J].Journal of Alloys and Compounds,2004,364:283-288.
[21] Niu H;Northwood D O .[J].International Journal of Hydrogen Energy,2002,27:69-77.
[22] Kuriyama N;Sakai T;Miyamura H et al.[J].Journal of Alloys and Compounds,1993,202:183-197.
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