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Study on the phase structure and electrochemical properties of RE0.93Mg0.07Ni2.96Co0.60Mn0.37Al0.17 hydrogen storage alloy

被引：28
作者：
Li, M.
Han, S. M. [1 ]
Li, Y.
Guan, W.
Mao, L. R.
Hu, L.
机构：
[1] Yanshan Univ, Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
[2] Yanshan Univ, Dept Environm & Chem Engn, Qinhuangdao 066004, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2006年 / 51卷 / 26期
关键词：
hydrogen storage alloy; multi-phase structure; low-temperature electrochemical characteristics; high discharge capacity;
D O I：
10.1016/j.electacta.2006.03.037
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In our endeavor to improve overall properties of the La-Mg-Ni-Co type alloys, RE0.93Mg0.07Ni2.96Co0.60Mn0.37Al0.17 hydrogen storage electrode alloy with low magnesium content was obtained by inductive melting. The phase structure and electrochemical characteristics of the alloy were investigated by XRD and electrochemical measurement. The results indicate that RE0.93Mg0.07Ni2.96Co0.60 Mn0.37Al0.17 alloy has multi-phase microstructure containing the CaCu5 structure of LaNi5 phase as matrix phase and a little of LaNi3 phase as the secondary phase. The maximum discharge capacity of RE0.93Mg0.07Ni2.96Co0.60Mn0.37Al0.17 alloy reaches 359mAh/g, which is 7.2% higher than that of commercial AB(5) alloy electrode. The discharge capacity of RE0.93Mg0.07Ni2.96Co0.60Mn0.37Al0.17 alloy electrode at 233 K is up to 147 mAh/g, which is 308.3% higher than that of commercial AB5 alloy electrode. Meanwhile, the discharge capacity of RE0.93Mg0.07Ni2.96Co0.60Mn0.37Al0.17 alloy can reach 92.7% of commercial AB(5) alloy after 100 charge/discharge cycles. (c) 2006 Elsevier Ltd. All rights reserved.
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页码：5926 / 5931
页数：6
相关论文
共 15 条
[1]   Microstructure and high-temperature electrochemical characteristics of Zr0.9Ti0.1Ni1.0Mn0.7V0.3Six (x=0.05, 0.10, 0.15, 0.20) alloy [J].
Han, SM ;
Zhao, MS ;
Liu, AZ .
MATERIALS CHEMISTRY AND PHYSICS, 2005, 89 (2-3) :221-227
[2]   Structural investigation and hydrogen storage capacity of LaMg2Ni9 and (La0.65Ca0.35)(Mg1.32Ca0.68)Ni9 of the AB2C9 type structure [J].
Kadir, K ;
Sakai, T ;
Uehara, I .
JOURNAL OF ALLOYS AND COMPOUNDS, 2000, 302 (1-2) :112-117
[3]   Hydrogen storage properties of new ternary system alloys:: La2MgNi9, La5Mg2Ni23, La3MgNi14 [J].
Kohno, T ;
Yoshida, H ;
Kawashima, F ;
Inaba, T ;
Sakai, I ;
Yamamoto, M ;
Kanda, M .
JOURNAL OF ALLOYS AND COMPOUNDS, 2000, 311 (02) :L5-L7
[4]   Investigations on the cycle stability and the structure of the MmNi3.6Co0.75Mn0.55Al0.1 hydrogen storage alloy -: II.: Microstructure investigations and discussions [J].
Li, CJ ;
Wang, XL .
JOURNAL OF ALLOYS AND COMPOUNDS, 1999, 284 (1-2) :274-281
[5]   A study on the structure and electrochemical properties of La2Mg(Ni0.95M0.05)9 (M = Co, Mn, Fe, Al, Cu, Sn) hydrogen storage electrode alloys [J].
Liao, B ;
Lei, YQ ;
Chen, LX ;
Lu, GL ;
Pan, HG ;
Wang, QD .
JOURNAL OF ALLOYS AND COMPOUNDS, 2004, 376 (1-2) :186-195
[6]   Effect of Co content on the structural and electrochemical properties of the La0.7Mg0.3Ni3.4-xMn0.1Cox hydride alloys II.: Electrochemical properties [J].
Liu, YF ;
Pan, HG ;
Gao, MX ;
Lei, YQ .
JOURNAL OF ALLOYS AND COMPOUNDS, 2004, 376 (1-2) :304-313
[7]   Hydrogen storage and electrochemical properties of the La0.7Mg0.3Ni3.825-xCo0.675Mnx hydrogen storage electrode alloys [J].
Liu, YF ;
Pan, HG ;
Gao, MX ;
Zhu, YF ;
Lei, YQ .
JOURNAL OF ALLOYS AND COMPOUNDS, 2004, 365 (1-2) :246-252
[8]   A study of the structural and electrochemical properties of La0.7Mg0.3 (Ni0.85Co0.15)x (x=2.5-5.0) hydrogen storage alloys [J].
Pan, HG ;
Liu, YF ;
Gao, MX ;
Lei, YQ ;
Wang, QD .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (05) :A565-A570
[9]  
RAL MN, 1997, INT J HYDROGEN ENERG, V22, P679
[10]   HYDROGEN SOLUBILITY IN 1-5 COMPOUNDS BETWEEN YTTRIUM OR THORIUM AND NICKEL OR COBALT [J].
TAKESHITA, T ;
WALLACE, WE ;
CRAIG, RS .
INORGANIC CHEMISTRY, 1974, 13 (09) :2282-2283
12