| 1 | Influences of low-Ti substitution for La and Mg on the electrochemical and kinetic characteristics of AB_3-type hydrogen storage alloy electrodes显示文摘The(La0.67Mg0.33)1-xTixNi2.75Co0.25(x = 0,0.05,0.10,0.15 and 0.20,at%) alloys were synthesized by arc melting and subsequent heat solid-liquid diffusing method.The structure,electrochemical properties and kinetic characteristics of the alloys were investigated systematically.The results showed that all the alloys mainly consisted of the(La,Mg)Ni3,LaNi5 phases,and the lattice parameters and the cell volumes of the(La,Mg)Ni3 and LaNi5 phases decreased with increasing Ti content.The alloy electrodes could be activated to reach their maximum discharge capacity within five cycles.The cycle life after 100 charge/discharge cycles(C100/Cmax) and the high-rate dischargeability at a discharge current density of 1200 mA/g first increased and then decreased.All the results showed that low-Ti content in AB3-type hydrogen storage alloys was beneficial to improvements of the overall electrochemical properties,and the optimum overall electrochemical performance of the alloy electrodes was obtained when x = 0.05. | DONG ZhenWei1,2,WU YaoMing1,MA LiQun2,SHEN XiaoDong2 & WANG LiMin1 1 State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,C hangchun 130022,China 2 College of Material Science and Engineering,Nanjing University of Technology,Nanjing 210009,China | 2010 | Science China(Technological Sciences)2010，53，1： | 2 |
| 4 | Synthesis and Crystal Structure of Neodymium Complex with Glycine [Nd(Gly)(H_2O)_7]Cl_3显示文摘The title complex [Nd(Gly)(H 2O) 7]Cl 3 was synthesized and its crystal structure was determined by X ray diffraction to obtain a final R value of 0 026 0 and a wR value of 0 086 8. The crystal is of monoclinic system with a space groug Pm . Every two neodymium ions in the crystal are connected with a carboxyl group to form a polymeric chain molecule. And each neodymium ion is further coordinated with seven oxygen atoms from water molecules. The counter ion(Cl -) is non coordinated to fill up the space between the polymeric chains. So the Nd 3+ cation is nine coordinated and the coordination polyhedron is a trigonotetradecahedron. In addition, there exists the mirror symmetry in the complex. | LI Jun ran ** , ZHOU Li ping and JIN Tian zhu (State Key Laboratory of Rare Earth Materials Chemistry and Application, Peking University, Beijing 100871, P. R. China) YU Kai bei (Chengdu Centre for Analysis and Measurement, Academic Sinica, C | 1999 | Chemical Research in Chinese Universities1999，15，4： | 1 |
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