研究了Mn含量对La0.65Mg0.35Ni3.1-xMnx(x=0.0,0.1,0.2,0.3,0.4)贮氢电极合金高温(333K)放电性能的影响.随Mn含量的增加,该系列合金电极在70 mA·g-1放电电流密度下的高温容量保持率从93.9%(x=0.0)增加到119.4%(x=0.4),而且,x＞0.1合金的高温容量保持率几乎相同.333K的电化学P-C-T曲线测试结果表明,Mn对Ni的部分代替明显降低了合金的放氢平台压,x＞0.1合金的吸/放氢平台滞后相对较小,说明x＞0.1合金的高温特性有所改善.腐蚀曲线测量结果表明,由于合金中Mn的存在,合金电极的腐蚀电流Icorr减小,腐蚀电位Ecorr正移,表明合金的耐腐蚀性能增强.
参考文献
| [1] | 闫慧忠,孔繁清,熊玮,李宝犬,李金,朱敏.La0.55Pr0.05NdxMg0.4-xNi3.3Al0.1（x = 0.10～0.20）储氢合金的研究Ⅱ：电化学性能[J].稀土,2008(02):1-6. |
| [2] | 徐光宪;章庆权.新型化学电源[M].北京:国防工业出版社,1984:62-66. |
| [3] | 刘永锋,潘洪革,金勤伟,李锐,李寿权,葛红卫,雷永泉.温度对La-Mg-Ni-Co-Mn贮氢电极合金电化学性能的影响[J].中国有色金属学报,2004(05):802-808. |
| [4] | 李嵩,季世军,孙俊才.贮氢电极合金ZrCr0.4Mn0.2V0.1Co0.1Ni1.2高温电化学性能的研究[J].电化学,2004(01):81-86. |
| [5] | J.J.Reilly;G.D.Adzic .The correlation between composition and electrochemical properties of metal hydride electrodes[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(0):569-582. |
| [6] | J. Kleperis;G. Wojcik;A. Czerwinski;J. Skowronski;M. Kopczyk;M. Beltowska-Brzezinska .Electrochemical behavior of metal hydrides[J].Journal of solid state electrochemistry,2001(4):229-249. |
| [7] | Sakai T;Oguro K;Miyamura H et al.Some factors affecting the cycle lives of LaNi5-based alloy electrodes of hydrogen batteries[J].Journal of the Less-Common Metals,1990,161:193-202. |
| [8] | Meli F;Zuttel A;Schlabach L .Electrochemical and surface properties of low cost,cobalt-free LaNi5-type hydrogen storage alloys[J].Journal of Alloys and Compounds,1993,202:81-88. |
| [9] | Chang J K;Shong D S;Tsai W T .Effects of Co,Mn contents on the electrochemical characteristics of the LaNi3.8(Co+Mn)0.96Al0.24 electrodes in potassium hydroxide electrolyte[J].J Power Soc,2002,103:280-285. |
| [10] | 唐有根;李文良.镍氢电池[M].北京:化学工业出版社,2007:189-190. |
| [11] | X. B. Zhang;D. Z. Sun;W. Y. Yin;Y. J. Chai;M. S. Zhao .Effect of Mn content on the structure and electrochemical characteristics of La{sub}0.7Mg{sub}0.3Ni{sub}(2.975-x)Co{sub}0.525Mn{sub}x (x = 0-0.4) hydrogen storage alloys[J].Electrochimica Acta,2005(14):2911-2918. |
| [12] | 周作祥;何春红;王正平 等.电化学法测定几种稀土贮氢合金的热力学函数[J].物理化学学报,1992,8(04):558-562. |
| [13] | 闫慧忠 .镁基和稀土—镁基储氢材料性能优化及其电化学容量衰减的抑制[D].华南理工大学,2007. |
| [14] | Liao B;Lei Y Q;Chen L X et al.Effect of the La/Mg ratio on the structure and electrochemical properties of LaxMg3-xNi9(x=1.6～2.2)hydrogen storage electrode alloys for nickel-metal hydride batteries[J].Journal of Power Sources,2004,129:358-367. |
| [15] | Hongge Pan;Qinwei Jin;Mingxia Gao .Effect of the cerium content on the structural and electrochemical properties of the La_(0.7-x)Ce_xMg_(0.3)Ni_(2.875)Mn_(0.1)Co_(0.525) (x = 0-0.5) hydrogen storage alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):237-245. |
| [16] | Yongfeng Liu;Hongge Pan;Mingxia Gao et al.Influence of Ni addition on the structures and electrochemical properties of La0.7Mg0.3 Ni2.65+xCo0.75Mn0.1(x=0.0～0.5)hydrogen storage alloys[J].Journal of Alloys and Compounds,2008,389(1-2):281-289. |
| [17] | 胡茂圃.腐蚀电化学[M].北京:冶金工业出版社,1991 |
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%