在Ar气保护下采用磁悬浮感应熔炼方法,制备无Co La1.8Ti0 2MgNi9.xAlx(x=0,0.1,0.2,0.3,0.4)合金,系统研究Al取代Ni对合金的结构及贮氢性能的影响.所有合金均包含LaMg2Ni9相,当Al含量x≥0.1,La(Ni,Al)5相取代LaNi5相、LaNi3相消失、LaNi2相出现.测试合金的焓变值与LaNi5合金(-30.6 kJ/molH2)相近.Al取代Ni不仅提高合金电极的放电容量,而且改善循环稳定性及电化学动力学性能.La1.8Ti0.2MgNi8.7Al0 3合金贮氢性能较好,30℃下有效吸氢质量分数为1.32％；最大放电容量达到340 mAh/g;1400 mA/g放电电流密度下高倍率放电性能HRD1400高达79.8％;经100次充放电循环放电容量保持率为60％.
参考文献
| [1] | WillemsJJG .[J].JLess-CommonMet,1987,129:13. |
| [2] | Sakai T;Miyamura H;Kuriyama N et al.[J].Journal of the Electrochemical Society,1990,137:795. |
| [3] | Latroche M;Chabre Y;Percheron-Guegan A et al.[J].Journal of Alloys and Compounds,2002,330-332:787. |
| [4] | Kohno T;Yoshida H;Kawashima F et al.[J].Journal of Alloys and Compounds,2000,311:L5. |
| [5] | 蒋卫卿,周正诚,黄春玉,蓝志强,郭进.铸态及退火La1.9Ti0.1MgNi9合金的贮氢性能[J].稀有金属材料与工程,2010(11):1888-1892. |
| [6] | 瞿鑫鑫,马立群,金传伟,赵相玉,丁毅.氟化处理对La0.67Mg0.33Ni2.25Co0.75贮氢合金电化学性能的影响[J].稀有金属材料与工程,2011(03):543-546. |
| [7] | Willems J J G;Philips J .[J].Resuscitation,1984,39:1. |
| [8] | Mao L C;Shan Z Q;Yin S H et al.[J].Journal of Alloys and Compounds,1999,293-295:825. |
| [9] | DongXP;ZhangYH;LüFX et al.[J].IntJHydrogenEnergy,2007,32:4949. |
| [10] | Zhao X L;Zhang Y H;Li B W et al.[J].Journal of Alloys and Compounds,2008,454:437. |
| [11] | Dong Z W;Ma L Q;Shen X D et al.[J].International Journal of Hydrogen Energy,2011,36:893. |
| [12] | Liao B;Lei Y Q et al.[J].Journal of Alloys and Compounds,2004,376:186. |
| [13] | Li Y;Han S M et al.[J].Journal of Alloys and Compounds,2008,458:357. |
| [14] | Wu F;Zhang M Y;Mu D B .[J].Transactions of Nonferrous Metals Society of China,2010,20:1885. |
| [15] | Jiang W Q;Lan Z Q;Xu L Q et al.[J].International Journal of Hydrogen Energy,2009,34:4827. |
| [16] | Sakai T;Miyamura H;Kuriyama N et al.[J].Journal of the Less-Common Metals,1990,159:127. |
| [17] | Liu Y F;Pan H G;Gao M X et al.[J].International Journal of Hydrogen Energy,2008,33:124. |
| [18] | Nomura K;Uruno H;Ono S et al.[J].Journal of the Less-Common Metals,1985,107:221. |
| [19] | Nakamura Y;Nakamura H;Fujitani S et al.[J].Journal of Alloys and Compounds,1994,210:299. |
| [20] | Chen J;Takeshita H T;Tanaka H et al.[J].Journal of Alloys and Compounds,2000,302:304. |
| [21] | Miyamura H;Sakai T;Oguro K et al.[J].Journal of the Less-Common Metals,1989,146:197. |
| [22] | Miyamura H;Kuriyama N;Sakai T et al.[J].Journal of the Less-Common Metals,1991,172-174:1205. |
| [23] | Liao B;Lei Y Q;Chen L X et al.[J].Journal of Alloys and Compounds,2005,404-406:665. |
| [24] | Guo J;Zhang R et al.[J].Journal of Alloys and Compounds,2007,429:348. |
| [25] | Rozdzy(n)ska-Kielbik B;Iwasieczko W;Drulis H et al.[J].Journal of Alloys and Compounds,2000,298:237. |
| [26] | Oesterreicher H;Clinton J .[J].Materials Research Bulletin,1976,11:1241. |
| [27] | Pan H G;Liu Y F;Gao M X et al.[J].Journal of the Electrochemical Society,2003,150:A565. |
| [28] | Cuevas F;Joubert J M et al.[J].Applied Physics A:Materials Science and Processing,2001,72:225. |
| [29] | Reilly J J;Besenhard J O.Handbook of Battery Materials[M].New York:wiley,2000 |
| [30] | Miao H;Pan H G;Zhang S C et al.[J].IntJHydrogenEnergy,2007,32:3387. |
| [31] | Notten P H L .[J].Journal of the Electrochemical Society,1991,138:1877. |
| [32] | Ura H.;Uchida I.;Nishina T. .ELECTROCHEMICAL MEASUREMENTS OF SINGLE PARTICLES OF PD AND LANI5 WITH A MICROELECTRODE TECHNIQUE[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,1995(1/2):169-173. |
| [33] | Zhang G;Popov B N;White R E .[J].Journal of the Electrochemical Society,1995,142:2695. |
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