Electrochemical performances of Mg45M5Co50 (M=Pd, Zr) ternary hydrogen storage electrodes

被引：9

作者：

Zhan, Le-yu ^{[1
]}

Zhang, Yao ^{[1
]}

Zhu, Yun-feng ^{[2
]}

Zhuang, Xiang-yang ^{[1
]}

Wan, Neng ^{[3
]}

Qu, Yi ^{[4
]}

Guo, Xin-li ^{[1
]}

Chen, Jian ^{[1
]}

Wang, Zeng-mei ^{[1
]}

Li, Li-quan ^{[2
]}

机构：

[1] Southeast Univ, Sch Mat Sci & Engn, Nanjing 211189, Jiangsu, Peoples R China

[2] Nanjing Tech Univ, Coll Mat Sci & Engn, Nanjing 210009, Jiangsu, Peoples R China

[3] Southeast Univ, Sch Elect Sci & Engn, Nanjing 210096, Jiangsu, Peoples R China

[4] Dalian Environm Monitoring Ctr, Dalian 116023, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2016年 / 26卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Mg-based electrode alloy; hydrogen storage; mechanical alloying; body-centered cubic structure; electrochemical performance; elemental substitution; ALLOYS; CO; MG50CO50; KINETICS; PHASE; PD; ND;

D O I：

10.1016/S1003-6326(16)64243-7

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In order to improve the discharge capacity and cyclic life of Mg-Co-based alloy, ternary Mg45M5Co50 (M=Pd, Zr) alloys were synthesized via mechanical alloying. TEM analysis demonstrates that these alloys all possess body-centered cubic (BCC) phase in nano-crystalline. Electrochemical experiments show that Mg45Zr5Co50 electrode exhibits the highest capacity (425 mA.h/g) among the Mg45Zr5Co50 (M=Mg, Pd, Zr) alloys. And Mg45Pd5Co50 electrode lifts not only the initial discharge capacity (379 mA.h/g), but also the discharge kinetics, e.g., exchange current density and hydrogen diffusion ability from that of Mg50Co50. It could be concluded that the electrochemical performances were enhanced by substituting Zr and Pd for Mg in Mg-Co-based alloy.

引用

页码：1388 / 1395

页数：8

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