采用XRD分析了La1.3CaMg0.7Ni9储氢合金的晶体结构,并研究了合金的气相储氢特性以及电化学性能.结果表明,合金由具有PuNi3结构的LaNi3主相和LaNi5、LaNi2.28第二相构成;在1.6MPa氢压和300K下,合金的储氢量达到1.68%(质量分数),比纯LaNi5的储氢量提高了20%;合金的活化性能良好,经3个充放电循环即可完全活化,其放电容量达到395mA*h/g,比AB5型储氢合金的容量提高了23%,经100次循环后容量保持率为80%.
参考文献
| [1] | F. Feng;M. Geng;D. O. Northwood .Electrochemical behaviour of intermetallic-based metal hydrides used in Ni/metal hydride (MH) batteries: a review[J].International journal of hydrogen energy,2001(7):725-734. |
| [2] | Hu WK.;Noreus D.;Ye Z. .Studies on multi-component rare earth-based hydrogen storage alloys with small amounts of boron[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(1/2):314-320. |
| [3] | Li R.;Wang XL.;Wu JM. .Effects of AB(5)-type hydrogen storage alloy prepared by different techniques on the properties of MH/Ni batteries[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1):40-45. |
| [4] | Joubert J M;Sun D;Latroche M et al.Electrochemical performances of ZrM2 (M=V, Cr, Mn, Ni) Laves phases and the relation to microstructures and thermodynamical properties[J].Journal of Alloys and Compounds,1997,253-254:564-569. |
| [5] | Züttel A;Meli F;Chartouni D et al.Properties of Zr(V0.25Ni0.75)2 metal hydride as active electrode material[J].Journal of Alloys and Compounds,1996,239(02):175-182. |
| [6] | J.Chen;H.T.Takeshita .Hydriding properties of LaNi_3 and CaNi_3 and their substitutes with PuNi_3-type structure[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1/2):304-313. |
| [7] | Kadir K;Sakai T;Uehara I .Synthesis and structure determination of a new series of hydrogen storage alloys: RMg2Ni9 (R = La, Ce, Pr, Nd, Sm and Gd) built from MgNi2 Laves-type layers alternating with AB5 layers[J].Journal of Alloys and Compounds,1997,257(1-2):115-121. |
| [8] | K.Kadir;N.Kuriyama .Structural investigation and hydrogen capacity of CaMg2Ni9: a new phase in the AB2C9 system isostructural with LaMg2Ni9[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(1/2):145-154. |
| [9] | K.Kadir;T.Sakai .Structural investigation and hydrogen capacity of Ymg2Ni9 and (Y0.5Ca0.5)(MgCa)Ni9: new phases in the AB2C9 system isostructural with LaMg2Ni9[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(1/2):264-270. |
| [10] | K.Kadir;T.Sakai .Structural investigation and hydrogen storage capacity of LaMg_2Ni_9 and (La_(0.65) Ca_(0.35))(Mg_(1.32) Ca_(0.68))Ni_9 of the AB_2C_9 type structure[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1/2):112-117. |
| [11] | Kohno T.;Yoshida H. .Hydrogen storage properties of new ternary system alloys: La_2MgNi_9, La_5Mg_2Ni_(23), La_3MgNi_(14)[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(2):L5-L7. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%