系统研究了La0.7Mg0 3(Ni0.85Co0.15)x(x＝2.5,3.0,3.5,4.0,4.5,5.0)贮氢电极合金的结构和储氢性能.该类型合金由(La,Mg)Ni3相(PuNi3型结构)和LaNi5相(CaCu5型结构)组成,两相的a轴参数和晶胞体积都随着x值的增大而减小.(La,Mg)Ni3相的丰度先从x＝2.5时的48.4%增加到x＝3.5时的78.2%,然后又减小到x＝5.0时的12.2%,而LaNi5相的丰度在x＝2.5～3.5时基本保持不变(～20%),在x＝4.0时突然增加到71.9%.合金的吸氢量从x＝2.5时的0.86%(质量分数)增加到x＝3.5时的1.50%然后又减小到x＝5.0时的1.19%.合金的放氢平台压力在x＝2.5～3.5时保持基本不变(～65.9 kPa),然后逐渐增加到x＝5.0时的0.30 MPa.随着x的增加,吸放氢过程的滞后效应先增大后减小,而合金的放氢平台变得更加平坦.
参考文献
| [1] | T.Sakai, H.Miyamura, N.Kuriyama, A.Kato, K.Oguro, H.Ishikawa. Metal Hydride Anodes For Nickel Hydrogen Secondary Battery. J.Electrochem Soc., 137, 795(1990) |
| [2] | J.J.G.Willems, Metal hydride electrodes stability of LaNi5-related compounds. Philips J. Res., 39(1),1(1984) |
| [3] | H.G.Pan, J.X.Ma, C.S.Wang, C.P. Chen, Q.D.Wang, Effect of Co content on the kinetic properties of the MlNi4.3-xCoxAl0.7 hydride electrodes. Electrochim. Acta, 44, 3977(1999) |
| [4] | H.G.Pan, Y.F.Zhu, M.X.Gao, Q.D.Wang, Investigation of the Structural and Electrochemical Properties of Superstoichiometric Ti-Zr-V-Mn-Cr-Ni Hydrogen Storage Alloys. J. Electrochem. Soc., 149, 829(2002) |
| [5] | ZHU Yunfeng(朱云峰),PAN Hongge(潘洪革),MA Jianxin(马建新),LI Shouquan(李寿权),GE Hongwei(葛红卫),YING Tiao(应窕),WANG Qidong(王启东),The effects of partial substitution of Mn by Cr on the phase structure,microstructure and electrochemical properties of Ti-Zr-V-Mn-Ni hydrogen storage alloys (Cr部分替代Mn对Ti-Zr-V-Mn-Ni贮氢合金相结构、纤维组织及电化学性能的影响),Acta Met.Sin(金属学报),37(10),1018(2001) |
| [6] | LI Zhizun(李志尊),LEI Yongquan(雷永泉),HAN Fengqi(韩凤起),Effects of Al-substitutlon on the electrochemical performance of rare eabth based hydrogen storage alloy at high temperature(添加Al对稀土系贮氢电极合金高温性能的影响),Chinese J Mat Res.(材料研究学报),16(1),105(2002) |
| [7] | C.Iwakura,K.Fukuda,H.Senoh,H.Inoue,M.Matsuoka,Y.Yamamoto,Electrochemical characterization of MmNi4 0-xMn0.75Al0.25Cox electrodes as a function of cobalt content,Electrochem.Acta,43,2041(1998) |
| [8] | MA Jianxin(马建新),PAN Hongge(潘洪革),ZHU Yunfeng(朱云峰),LI Shouquan(李寿权),CHENn Changpin(陈长聘),A novel method toimprovethe electrochamical properties of hydrogen storage electrode alloy (一种改善贮氢电极合金化学性能的新方法),Acta Met.Sin.(金属学报),37(1),57(2001) |
| [9] | LEI Yongquan(雷永泉),New Energy Materials(新能源材料),1st,(Tianjin,Tianjin University Publishing Company,2000)p.54 |
| [10] | K.Kadir, N.Kuriyama, T.Sakai, I.Uehara, L.Eriksson, Structural investigation and hydrogen capacity of CaMg2Ni9: a new phase in the AB2C9 system isostructural with LaMg2Ni9, J.Alloys Comps., 284,145(1999) |
| [11] | J.Chen, H.T.Takeshita, H.Tanaka, N.Kuriyama, T.Sakai, I.Uehara, M.Haruta, Hydriding properties of LaNi3and CaNi3 and their substitutes with PuNi3-type structure, J. Alloys Comps., 302, 304(2000) |
| [12] | T.Kohno, H.Yoshida, F.Kawashima, T.Inaba, I.Sakai, M.Yanamoto, M.Kanda, Hydrogen storage properties of new ternary system alloys: La2MgNi9, La5Mg2Ni23, La3MgNi14, J. Alloys Comps., 311, L5(2000) |
| [13] | W.K.Hu, Effect of microstructure, composition and non-stoichiometry on electrochemical properties of lowCo rare-earth nickel hydrogen storage alloys, J. Alloys Comp., 279, 295(1998) |
| [14] | H.Oesterreicher, K.Ensslen, A.Kerlin, E.Bucher, Hydriding behavior in Ca-Mg-Ni-B, Mater. Res. Bull., 15,275(1980) |
| [15] | T.Takeshita, W.E.Wallace, R.S.Craig, Solubility of hydrogen in RCo3 compounds, Inorg. Chem., 13,2283(1974) |
| [16] | J.Chen, N.Kuriyama, H.T.Takeshita, H.Tanaka, T.Sakai, M.Haruta, Hydrogen storage alloys with PuNi3-type structure as metal hydride electrodes, Electrochem. Solid-State Lett., 3(6), 249(2000) |
| [17] | K.H.J.Buschow, H.H.Van Mal, Phase relations and hydrogen absorption in the Lanthanum-Nickel system,J.Less- Common Metals, 27, 203(1972) |
| [18] | R.Balasubramaniam, Hysteresis in metal-hydrogen systems, J.Alloys Compd., 253, 203(1997) |
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