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A commercial AB5 hydrogen storage alloy was used as an additive to improve the electrochemical properties of Ml-Mg-Ni-based hydrogen storage alloys.The effect of AB5 alloy addition on the phase structure,charge/discharge characteristics,and electrochemical kinetics of Ml0.90Mg0.10Ni3.08Mn0.13Co0.63Al0.14 alloy was investigated.The maximum discharge capacity of Ml0.90Mg0.10Ni3.08Mn0.13Co0.63Al0.14 + 4 wt.% AB5 electrode reaches 406 mAh/g.The anodic polarization,cyclic voltammetry,and potential step discharge experiments show that the electrochemical kinetics of the electrode with additives was promoted,with the LaNi5 phase of AB5 alloy acting as electro-catalytic sites in the electrode alloy.The high-rate dischargeability of Ml0.90Mg0.10Ni3.08Mn0.13Co0.63Al0.14 + 4 wt.% AB5 alloy electrode at 1100 mA/g reaches 60.9%,which is 9.4% higher than that of Ml0.90Mg0.10Ni3.08Mn0.13Co0.63Al0.14 alloy electrode.The cycling stability of the electrode with 4 wt.% AB5 alloy has also been improved.

参考文献

[1] Willems J J G;Buschow K HJ .From permanent magnets to rechargeable hydride electrodes[J].Journal of the Less-Common Metals,1987,129:13.
[2] 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.
[3] Kadir K;Sakai V;Uehara I .Structural investigation and hydrogen storage 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.
[4] Liu Y F;Pan H G;Gao M X;Zhu Y F,Lei Y Q .Hydrogen storage and electrochemical properties of the La0.7Mg0.3Ni3.825-xCo0.675Mnx hydrogen storage electrode alloys[J].Journal of Alloys and Compounds,2004,365:246.
[5] Li Y;Han S M;Li J H;Zhu X L,Hu L .The effect of Nd content on the electrochemical properties of low-Co La-Mg-Ni-based hydrogen storage alloys[J].Journal of Alloys and Compounds,2008,458:357.
[6] Li M;Han S M;Li Y;Guan W,Mao L R,and Hu L .Study on the phase structure and electrochemical properties of RE0.93Mg0.07Ni2.96Co0.60Mn0.37Al0.17 hydrogen storage alloy[J].Electrochimica Acta,2006,51:5926.
[7] Toshiki Tanaka;Minora Kuzufaara;Masahara Watada .Effect of rare earth oxide additives on the performance of NiMH batteries[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2006(0):323-326.
[8] 董桂霞,杜军,朱磊,吴伯荣.CoO添加剂对La0.7Mg0.3(Ni0.85Co0.15)3.5贮氢合金电化学性能的影响[J].中国稀土学报,2006(04):465-469.
[9] Tang R;Liu L Q;Liu Y N;Yu G .Study on the microstructure and the electrochemical properties of Ml0 7Mg0 2Ni2 8Co0 6 hydrogen storage alloy[J].International Journal of Hydrogen Energy,2003,28:815.
[10] Liu Y F;Pan H G;Gao M X;Li R,Lei Y Q .Effect of Co content on the structural and electrochemical properties of the La0.7Mg0.3Ni3.4-xMn0.1Cox hydride alloys:II.Electrochemical properties[J].Journal of Alloys and Compounds,2004,376:304.
[11] 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.
[12] Zheng G.;White RE.;Popov BN. .ELECTROCHEMICAL DETERMINATION OF THE DIFFUSION COEFFICIENT OF HYDROGEN THROUGH AN LANI4.25AL0.75 ELECTRODE IN ALKALINE AQUEOUS SOLUTION[J].Journal of the Electrochemical Society,1995(8):2695-2698.
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