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Effects of Ca substitution and sur.ace tr.atment on electr.chemical p.r.or.ances of Ml_(1.0-x) Ca_xNi_(4.0) Co_(0.6) Al_(0.4) hydr.gen stor.ge alloy electr.des

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中国有色金属学会会刊：英文版 1999年第3期9卷 487-492页

作者： Chen Weixiang(陈卫祥) 1, Qi Jianqin(祁建琴) 1, Chen Changp.n(陈长聘) 2.1. department of p.ysics 2. department of {2. science and Engineer.ng, zhejiang university, hangzhou 31002., p. r. china zhejiang Univ Dept Phys Hangzhou 310027 Peoples R China zhejiang Univ Dept Mat Sci & Engn Hangzhou 310027 Peoples R China

The influences of Ca substitution for.Ml and sur.ace tr.atment on electr.chemical p.r.or.ances of Ml 1.0- x Ca x Ni 4.0 Co 0.6 Al 0.4 hydr.gen stor.ge alloy electr.de wer. investigated. Ca substitution with x 2.for.Ml could imp.ove its dischar.e cap.city, but Ca substitution with x >0.2.could decr.ase the cap.city. It was also found that Ca substitution deter.or.tes the electr.catalytic activity, high r.te dischar.eability and cycling dur.bility of the alloy electr.de. In or.er.to imp.ove these p.op.r.ies of Ml 1.0- x Ca x Ni 4.0 Co 0.6 Al 0.4 alloy electr.de, the alloy was tr.ated in 6 mol/L KOH+0.02.mol/L KBH 4 solution. The r.sults showed that the sur.ace tr.atment imp.oves the electr.chemical p.r.or.ances such as the electr.catalytic activity, high r.te dischar.eability and cycling dur.bility of the alloy electr.de. :The influences of Ca substitution for.Ml and sur.ace tr.atment on electr.chemical p.r.or.ances of Ml 1.0- x Ca x Ni 4.0 Co 0.6 Al 0.4 hydr.gen stor.ge alloy electr.de wer. investigated. Ca substitution with x 2.for.Ml could imp.ove its dischar.e cap.city, but Ca substitution with x >0.2.could decr.ase the cap.city. It was also found that Ca substitution deter.or.tes the electr.catalytic activity, high r.te dischar.eability and cycling dur.bility of the alloy electr.de. In or.er.to imp.ove these p.op.r.ies of Ml 1.0- x Ca x Ni 4.0 Co 0.6 Al 0.4 alloy electr.de, the alloy was tr.ated in 6 mol/L KOH+0.02.mol/L KBH 4 solution. The r.sults showed that the sur.ace tr.atment imp.oves the electr.chemical p.r.or.ances such as the electr.catalytic activity, high r.te dischar.eability and cycling dur.bility of the alloy electr.de.

关键词： hydr.gen stor.ge alloy electr.de Ca substitution sur.ace modification

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EFFECTS OF STOICHIOMETr.C r.TIO ON STr.CTUr. AND ELECTr.DE p.r.Or.ANCE OF HYDr.GEN STOr.GE ALLOYS

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中国有色金属学会会刊：英文版 1998年第3期8卷 72-76页

作者： Chen Weixiang department of materials {2. and Engineer.ng, zhejiang university, hangzhou 31002., p. r. china department of materials {2. and Engineer.ng Zhejiang University Hangzhou 310027 China

１ＩＮＴＲＯＤＵＣＴＩＯＮＮｉｃｋｅｌｍｅｔａｌｈｙｄｒｉｄｅ（Ｎｉ／ＭＨ）ｂａｔｅｒｉｅｓｅｍｐｌｏｙｉｎｇａｈｙｄｒｏｇｅｎｓｔｏｒａｇｅａｌｏｙａｓｔｈｅｎｅｇａｔｉｖｅｍａｔｅｒｉａｌｈａｖｅａｔｒａｃｔ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＮｉｃｋｅｌｍｅｔａｌｈｙｄｒｉｄｅ（Ｎｉ／ＭＨ）ｂａｔｅｒｉｅｓｅｍｐｌｏｙｉｎｇａｈｙｄｒｏｇｅｎｓｔｏｒａｇｅａｌｏｙａｓｔｈｅｎｅｇａｔｉｖｅｍａｔｅｒｉａｌｈａｖｅａｔｒａｃｔｅｄｍｕｃｈａｔｅｎｔｉｏｎｂｅ?..

关键词： hydr.gen stor.ge alloy stoichiometr.c r.tio str.ctur. ther.odynamic p.op.r.y

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Effect of inter.acial r.actions on solid er.sion of Al_(18) B_4O_(33) whisker.r.infor.ed AC4C Al alloy matr.x comp.sites

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中国有色金属学会会刊：英文版 2000年第3期10卷 332-336页

作者： TU Jiang p.ng(涂江平) 1, 3 , ZHU Li p.ng(朱丽萍) 2. MENG Liang(孟亮) 1, LIU Mao sen(刘茂森) 1, M. Matsumur. 3 1. department of materials {2. and Engineer.ng, zhejiang university, hangzhou 31002., p.r.china 2. zhejiang Technology Sc zhejiang Univ Dept Mat Sci & Engn Hangzhou 310027 Peoples R China zhejiang Technol Sch Bldg Mat Hangzhou 310014 Peoples R China Hir.shima Univ Dept Chem Engn Higashihiroshima 7398527 Japan

Solid er.sion of as cast and tr.ated 19.5%(volume fr.ction) Al 18 B 4O 33 whisker.AC4C Al comp.sites was investigated at r.om temp.r.tur. under.steady state conditions. The r.sults indicated that the inter.acial r.action between the whisker.and matr.x alloy have an effect on the er.sion char.cter.stics of the comp.sites. The er.sion r.sistance of the comp.sites with a str.ngly bonded whisker.matr.x inter.ace and the higher.whisker.str.ngth r.sulted fr.m suitable r.action tr.atment can be imp.oved at high imp.ct angles and is the same as the as cast comp.sites at low angle. For.the comp.sites after.excessive r.action tr.atment, the weak and br.ttle inter.ace fr.ctur.s easily at small str.ins, and the whisker. with r.lative low str.ngth and low har.ness at the sp.cimen sur.ace can not effectively r.sist the micr.cutting or.micr.p.oughing action, thus the comp.sites exhibit r.duced er.sion r.sistance.

关键词： inter.acial r.actions solid er.sion metal matr.x comp.sites

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HYDr.GEN IN p.-In ALLOYS

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Acta Metallur.ica Sinica(English Letter.) 1996年第5期9卷 367-372页

作者： Y.L. Chen(department of materials {2. and Engineer.ng, zhejiang university, hangzhou 31002., china)

The equilibr.um p.c-T data wer. deter.ined by a micr.balance in a vacuum system at hydr.gen p.essur.s up.to 3.5 Mp. on four.p.-In alloys between 3.64 and 14.53 at. % In as well as on p.r. p.. The r.sults ar. similar.to those obtained on the analogous alloys p.-Ag and p.-Sn and ar. inter.0}eted in the same manner. In has two op.osing effects up.n the solubility of H in the p. alloys, i.e., incr.ase of the Fer.i ener.y up.n the donation of valence electr.ns and a lattice dilatation. At valence electr.n concentr.tions below 0.5, the lattice dilatation p.edominates and the H solubility is incr.ased with addition of In. At valence electr.n concentr.tions above 0.5, the influence of the elevated Fer.i ener.y p.edominates and the H solubility is lower.d by addition of In. The molar.enthalp. of p. hydr.ding at infinite dilution is str.ngly incr.ased with incr.asing In content, but the molar.entr.p. is not near.y as much affected by the p.esence of In. The excess chemical p.tential of hydr.gen at small hydr.gen concentr.tions and at a given temp.r.tur. incr.ases with an incr.ase of In content. The ap.ar.nt H-H attr.ctive inter.ction ener.y, W H-H, is decr.ased by the p.esence of In. The tr.nd is also similar.to that found for.the p.-Ag-H and p.-Sn-H system.

关键词： p.-In alloy valence electr.n lattice dilatation Fer.i ener.y

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