研究了Zr0.8Ti0.2(Ni0.6Mn0.2V0.2Cr0.05)x(x=1.8～2.4)贮氢合金中化学计量x对晶体结构和电化学性能的影响.结果表明:随着x值的增大,合金中C14相含量逐渐减少,C15相含量逐渐增加,C14和C15相的晶格常数均线性减小;随着x值的增大,合金电极的活化性能提高,高倍率放电性能和放电容量均先升高,至x=2.2时达到最大值(最大放电容量为370 mAh/g);超化学计量合金电极的循环寿命随x值的增大而降低,但当x＜2.2时,经充放电循环500次以后容量保持率仍在80%左右.当化学计量值x等于2.2时,合金电极的综合电化学性能最好.
参考文献
| [1] | 任可,雷永泉,陈立新,张庆安,王启东.（LaxCe1-x）0.9（PrNd）0.1（NiCoMnAl）5贮氢合金结构和电化学性能的研究[J].稀有金属材料与工程,2001(02):141-144. |
| [2] | Du Y L;Yang X G;Zhang Q A et al.Phase Structures and Electrochemical Properties of the Laves Phase Hydrogen Storage Alloys Zr1- xTi x(Ni0.6Mn0. 3V0. 1Cr0. 05)2[J].International Journal of Hydrogen Energy,2001(26):333. |
| [3] | 孙俊才,季世军,张永俊,刘莎.粘结材料及混合比例对Mg-Ni非晶合金电极电化学性能的影响[J].稀有金属材料与工程,2001(01):65-68. |
| [4] | 徐艳辉,陈长聘,王启东.新型储氢合金电极Ti3Ni2的电化学性能[J].稀有金属材料与工程,2001(01):23-26. |
| [5] | Zhang Q A;Lei Y Q;Yang X G;Du Y L,Wang Q D .Phase Structures and Electrochemical Properties of V3TiNi0. 56Hf0. 24Co xAlloys[J].Journal of Alloys and Compounds,2000,296:141. |
| [6] | Ovshinsky S R;Fetcenko M A;Ross J .A Nickel MetalHydride Battery for Electric Vehicles[J].Science,1993,260:176. |
| [7] | Jurczyk M.;Majchrzycki W.;Wojcik G.;Rajewski W. .Synthesis and electrochemical properties of high-energy ball-milled Laves phase (Zr,Ti)(V,Mn,Cr), alloys with nickel powder[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(1/2):299-302. |
| [8] | Shu K.Y. -;Yang XG;Zhang SK;Chen LS;Lu GL;Wang QD;Lei YQ .Comparative study on the electrochemical performance of rapidly solidified and conventionally cast hydride electrode alloy Zr(NiMnM) sub 2.1[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(1/2):124-128. |
| [9] | Boschung E.;Chartouni D.;Schlapbach L.;Zuttel A. .Hydriding properties of the Zr(Cr0.5Ni0.5)(alpha) (1.75 <=alpha <= 3.5) alloy system[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(1/2):294-298. |
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%