| Al元素对储氢合金RE0.8Mg0.2(Ni0.85-xCo0.15Alx)3.5的结构及电化学性能的影响 |
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| 引用本文： | 程利芳,王润博,蒲朝辉,汪保国,李志林,娄豫皖,何丹农,杨传铮.Al元素对储氢合金RE0.8Mg0.2(Ni0.85-xCo0.15Alx)3.5的结构及电化学性能的影响[J].稀有金属材料与工程,2009,38(3):451-455. |
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| 作者姓名： | 程利芳 王润博 蒲朝辉 汪保国 李志林 娄豫皖 何丹农 杨传铮 |
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| 作者单位： | 1. 纳米技术及应用国家工程研究中心,上海,200241
2. 中国科学院上海微系统与信息技术研究所,上海,200050 |
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| 摘 要： | 用感应熔炼法制备了La0.5Pr0.2Nd0.1Mg0.2(Ni0.85-xCo0.15Alx)3.5(x=0.01～0.04)合金,并在氩气气氛下,用900℃退火处理.XRD分析表明,合金有两个主相:La2Ni7相和LaNi5相,晶轴比c/a随着Al含量的增大而增大.电化学测试表明,放电容量随着Al含量的增大而减小,由x=0.01时的394.6 mAh/g下降到x=0.04时的380.6 mAh/g,充放电循环衰减速率由x=0.01时的-0.32 mAh/(g·cycle)降为x=0.04时的-0.20 mAh/(g·cycle),合金的倍率性能随着Al含量的增大而降低,当放电电流密度为1200 mA/g时,高倍率性能由x=0.01时的61%降为x=0.04的35%.研究表明,当x≤0.02时不仅保持了合金的高容量,而且明显改善了合金的循环性能.
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| 关 键 词： | 储氢合金 La2Ni7相 LaNi5相 PCT性能 电化学性能 |
| 收稿时间： | 3/2/2008 12:00:00 AM |
Effect of Al Content on Structure and Electrochemical Characteristics of Re0.8Mg0.2(Ni0.85-xCo0.15Alx)3.5 Hydrogen Storage Alloys |
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| Cheng Lifang,Wang Runbo,Pu Chaohui,Wang Baoguo,Li Zhilin,Lou Yuwan,He Dannong and Yang Chuanzheng.Effect of Al Content on Structure and Electrochemical Characteristics of Re0.8Mg0.2(Ni0.85-xCo0.15Alx)3.5 Hydrogen Storage Alloys[J].Rare Metal Materials and Engineering,2009,38(3):451-455. |
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| Authors: | Cheng Lifang Wang Runbo Pu Chaohui Wang Baoguo Li Zhilin Lou Yuwan He Dannong and Yang Chuanzheng |
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| Affiliation: | National Engineering and Research Center for Nanotechnology, Shanghai 200241, China;Shanghai Institute of Micro-System and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;Shanghai Institute of Micro-System and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;Shanghai Institute of Micro-System and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;Shanghai Institute of Micro-System and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;Shanghai Institute of Micro-System and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;National Engineering and Research Center for Nanotechnology, Shanghai 200241, China;Shanghai Institute of Micro-System and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China |
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| Abstract: | |
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| Keywords: | hydrogen storage alloy La2Ni7 phase LaNi5 phase PCT electrochemical properties |
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