检索结果-南通市图书馆

Structure and electrochemical properties of low-cobalt La_(1-x)Li_xNi_(3.2)Co_(0.3)Al_(0.3) (0≤x≤0.2) hydrogen storage electrode alloys

引用

Rare Metals 2006年第Z1期25卷 1-6页

作者： WEI Xuedong LIU Yongning ZHANG Peng State Key Laboratory for Mechanical Behavior of Materials School of Material Science and Engineering Xi''an Jiaotong University Xi''an 710049 China State Key Laboratory for Mechanical Behavior of Materials School of Material Science and Engineering Xi''an Jiaotong University Xi''an 710049 China State Key Laboratory for Mechanical Behavior of Materials School of Material Science and Engineering Xi''an Jiaotong University Xi''an 710049 China

The structure and electrochemical properties of a new low cobalt hydrogen storage electrode alloys La1-xLixNi3.2Co0.3Al0.3 (0≤x≤0.2) were investigated with a different additions of Li in replacement of La. With the increase of Li contents the maximum discharge capacity increases from 240 mAh·g-1(x=0) to 328.4 mAh·g-1(x=0.1) and the cycle stability is improved correspondingly. The capacity decay can remain 28.6% (x=0.2) after 230 charge/discharge cycles. The high rate discharge(HRD) ability of the alloys(x≤0.1) is improved and the best HRD is 34.1%(x=0.1) under the discharge current density 1200 mA·g-1. It is found that the prepared alloys are basically composed of LaNi5 as matrix phase and LaNi3 as second phase(x≤0.1). But the abundance of LaNi3 phase dramatically decreases with increasing x. When x=0.2, a new phase Al(NiCo)3 is formed.

关键词： hydrogen storage alloy microstructure high rate discharge ability cycling stability

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Phase Structure and Electrochemical Properties of Rare Earth Based Hydrogen Storage Alloys

Phase Structure and Electrochemical Properties of Rare Earth...

引用

2004国际稀土研究与应用研讨会（包头）

作者：陈伟东刘向东刘孝车广东 School of Material Science and Technology Inner Mongolia University of Technology Huhhot 010062 China School of Material Science and Technology Inner Mongolia University of Technology Huhhot 010062 China School of Material Science and Technology Inner Mongolia University of Technology Huhhot 010062 China School of Material Science and Technology Inner Mongolia University of Technology Huhhot 010062 China

＜正＞ The rare earth based hydrogen storage alloys MmxM1 1-x（ Ni3.55Co0.75Mn0.4 A10.3）（x=0-0.5） were investigated in this work. Adjusted Ml: Mm ratio to change the content of La,Ce,Pr and Nd in the alloys and then to change the phase structure, the influences of phase structure on the electrochemical properties were analyzed. The results indicate that the main phase of all alloys is LaNi5 with CaCu5 type structure and the crystal lattices constants of LaNi5 are changed with increasing x value, i. e, decreased α-axis, increased c-axis and axis ratio and nonlinear decreased crystal volume. The crystal volume of the alloy with x =0.3 is larger than others. There is second phase AlLaNi4 in alloys when x≥0. 3, which decrease the discharge capacity, but increase the cycling stability and high rate discharge ability. Compared comprehensively, the alloy with x =0.3 shows the higher discharge capacity and the better cycling stability.

关键词： rare earth based hydrogen storage alloy phase structure activation discharge capacity cycling stability high rate discharge ability

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：