测试了AB3型贮氢合金La0.67Mg0.33(NiCo)3铸态与快淬态的电化学性能,用XRD和SEM测试了合金的微观结构,研究了快淬对AB3型贮氢合金电化学性能的影响.结果表明,快淬使合金的放电容量降低,对合金的活化性能没有明显影响;快淬降低了合金的容量衰减率,提高了合金的循环寿命,其主要原因是快淬使合金的晶粒显著细化.铸态和快淬态合金均具有多相结构,包括斜六面体的(La,Mg)Ni3相,六方的LaNi5相及少量的LaNi2相.快淬使合金中的LaNi2相含量增加,这是快淬使合金放电容量下降的一个主要原因.
参考文献
| [1] | Oh JW.;Nahm KS.;Sim KS.;Kim CY. .The hydriding kinetics of LaNi4.5Al0.5 with hydrogen[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(1/2):270-276. |
| [2] | Kulkova SE.;Eremeev SV.;Egorushkin VE.;Kim JS.;Oh SY. .Hydrogen adsorption on Pd/TiFe (110) surface[J].Solid State Communications,2003(7):405-408. |
| [3] | Reilly J J;Wiswall R H .The reaction of magnesium and nickel and the formation of Mg2NiH4[J].Inorganic Chemistry,1968,7:2254-2256. |
| [4] | Kadir K;Sakai T;Uehara T et al.Structural investigation and hydrogen capacity of LaMg2Ni9 and(La0.65Ca0.35)(Mg1.32Ca0.68)Ni9 of the AB2C9 type structure[J].Journal of Alloys and Compounds,2000,302:112-117. |
| [5] | 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. |
| [6] | B. Liao;Y.Q. Lei;L.X. Chen .A study on the structure and electrochemical properties of La_2Mg(Ni_(0.95)M_(0.05))_9 (M = Co, Mn, Fe, Al, Cu, Sn) hydrogen storage electrode alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):186-195. |
| [7] | Chen J;Kuriyama N;Takeshita H et al.Hydrogen storage alloys with PuNi3-type structure as metal hydride electrode[J].Electrochemical and Solid-State Letters,2000,3(06):249-252. |
| [8] | Pan H G;Liu Y F;Gao M X et al.A study of the structure and electrochemical properties of La0.7Mg0.3(Ni0.85Co0.15)x(x=2.5～5.0)hydrogen storage alloys[J].Journal of the Electrochemical Society,2003,150(05):565-570. |
| [9] | Li C J;Wang X L;Wu J M et al.Effect of annealing on the hydrogen storage properties of rapidly quenched AB5-type alloys[J].Journal of Power Sources,1998,70:106-109. |
| [10] | Y.Q. Lei;S.K. Zhang;G.L. Lu .Influence of the material processing on the electrochemical properties of cobalt-free Ml(NiMnAlFe)_5 alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(0):861-865. |
| [11] | 李全安,陈云贵,涂铭旌,桑革,韩满贵,李宁,唐定骧.高性能贮氢合金电极的成分设计[J].电源技术,2000(04):246-250. |
| [12] | 谢中伟 .影响MH电极电催化活性的因素[J].电池,1996,26(03):146. |
| [13] | 吕建国,黄靖云,叶志镇.AB5型贮氢合金及其优化设计[J].金属功能材料,2001(04):5-12. |
| [14] | 李相哲,李秀华,王黎.AB5型贮氢合金研究进展[J].电池工业,2001(01):32-37. |
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%