研究了不同铸锭厚度(1～10mm)对薄壁铸造的铸态和退火态LPCNi3.55Co0.75Mn0.4Al0.3贮氢合金电化学性能的影响.结果发现: 铸态LPCNi3.55Co0.75Mn0.4Al0.3合金的0.2C放电容量随着合金锭厚度的增加有增大的趋势.10 mm厚铸态合金的活化性能优于其它厚度的合金,且在1C的放电容量和循环稳定性比在其它厚度的高.主要原因应归结为该厚度合金具有更大的晶胞体积和更小的晶格应力.退火态3 mm LPCNi3.55Co0.75Mn0.4Al0.3合金的综合电化学性能比铸态更优异,6 mm合金的循环稳定性和3～6 mm合金的活化性能得到改善.主要原因应归结为晶格应力的极大释放以及Mn等元素偏析的改善.
参考文献
| [1] | Sakai Tetsuo;Uehara Ituki;Ishikawa Hiroshi .R &D on metal hydride materials and Ni-MH batteries in Japan[J].Journal of Alloys and Compounds,1999,293-295:762. |
| [2] | Sandrock Gary .A panoramic overview of hydrogen storage alloys from a gas reaction point of view[J].Journal of Alloys and Compounds,1999,293-295:877. |
| [3] | Mishima R;Miyamura H;Sakai T et al.Hydrogen storage alloys rapidly solidified by the melt-spinning method and their characteristics as metal hydride electrodes[J].Journal of Alloys and Compounds,1993,192:176. |
| [4] | Nakamura H;Nakamura Y;Fujitani S et al.Influence of annealing on hydrogenation characteristics and microstructure of LaNi4.55Al0.45 alloy[J].Journal of Alloys and Compounds,1995,218:216. |
| [5] | Hu Weikang;Kim Dongmyung;Jeon Seokwon et al.Studies on Co-free rare-earth-based hydrogen storage alloys[J].Journal of Alloys and Compounds,1998,270:255. |
| [6] | Zhang LY .Electrochemical characteristics of AB sub 5 -type hydrogen storage alloys solidified at different cooling rates[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(0):621-625. |
| [7] | Zhang L Y;Klein Michael;Czajkowski Bob et al.Effects of cooling rate during casting on performance of metal hydride electrodes and nickel-metal hydride batteries[J].Journal of Alloys and Compounds,1999,293-295:608. |
| [8] | Li Chuanjian;Wang Xinlin;Li Xiumei et al.The effect of cast rate on the electrochemical properties of Ml(NiCoMnTi)5 hydrogen storage alloy[J].Acta Metallurgica Sinica,1998,34(03):288. |
| [9] | Li Chuanjian;Wang Xinlin;Wang Chongyu .Temperature characterization of the melt-spun Mm(NiCoMnTi)5 hydrogen storage alloy and the mechanism therein[J].Chinese Journal of Power Sources,1998,22:68. |
| [10] | Ye H.;Zhang H. .Effect of Ni content on the structure, thermodynamic and electrochemical properties of the non-stoichiometric hydrogen storage alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1/2):163-171. |
| [11] | 任可,雷永泉,陈立新,张庆安,王启东.Ml（Ni4.55-xCOxMn0.4Ti0.05）合金的相结构与电化学性能[J].金属学报,2000(04):364-369. |
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%