Synergistic effects of Gd and Co on the phase evolution mechanism and electrochemical performances of Ce2Ni7-type La–Mg–Ni-based alloys

Zhijie Gao; Yuhong Geng; Zhen Lin; Yongxiang Wei; Yongchun Luo; Hai-Wen Li

doi:10.1039/C9DT03944A

Synergistic effects of Gd and Co on the phase evolution mechanism and electrochemical performances of Ce₂Ni₇-type La–Mg–Ni-based alloys

Zhijie Gao,

*^ab Yuhong Geng,^a Zhen Lin,^cd Yongxiang Wei,^a Yongchun Luo*^d and Hai-Wen Li

^bef

Author affiliations

* Corresponding authors

^a Department of Chemical Engineering and Safety, Binzhou University, Binzhou 256600, China
E-mail: gaozhijie1983@126.com
Fax: +86-543-3190097
Tel: +86-543-3190097

^b International Research Center for Hydrogen Energy, Kyushu University, Fukuoka 819-0395, Japan

^c Xiamen Tungsten Company Limited, Xiamen 3610026, China

^d School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
E-mail: luoyc@lut.cn
Fax: +86-543-3190097
Tel: +86-543-3190097

^e International Research Center for Hydrogen Energy and WPI International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, Japan

^f Kyushu University Platform of Inter/Transdisciplinary Energy Research (Q-PIT), Kyushu University, Fukuoka 819-0395, Japan

Abstract

The influences of Gd and Co co-substitution for La and Ni on phase structures, and electrochemical properties of La_0.83−xGd_xMg_0.17Ni_3.35−2xCo_2xAl_0.15 (x = 0–0.83) alloys were investigated. All the alloys contained A₂B₇-type (Ce₂Ni₇- and Gd₂Co₇-type) phase, Pr₅Co₁₉-type phase, PuNi₃-type phase and CaCu₅-type phase. The partial replacement of Gd and Co for La and Ni increased the phase abundance of the Ce₂Ni₇-type superstructure and decreased cell volumes, which contributed to a better hydrogen absorption capacity, cyclic stability and HRD. Compared to those of single Gd- or Co-substitutions, the synergistic effects of Gd and Co on the overall electrochemical properties of alloys were significant. Such a superior overall electrochemical performance may result from appropriate cell volumes and anti-pulverization abilities.

Article information

https://doi.org/10.1039/C9DT03944A

Article type

Paper

Submitted

07 Oct 2019

Accepted

17 Nov 2019

First published

19 Nov 2019

Download Citation

Dalton Trans., 2020,49, 156-163

Permissions

Request permissions

Synergistic effects of Gd and Co on the phase evolution mechanism and electrochemical performances of Ce₂Ni₇-type La–Mg–Ni-based alloys

Z. Gao, Y. Geng, Z. Lin, Y. Wei, Y. Luo and H. Li, Dalton Trans., 2020, 49, 156 DOI: 10.1039/C9DT03944A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Dalton Transactions

Synergistic effects of Gd and Co on the phase evolution mechanism and electrochemical performances of Ce₂Ni₇-type La–Mg–Ni-based alloys

Abstract

Article information

Download Citation

Permissions

Synergistic effects of Gd and Co on the phase evolution mechanism and electrochemical performances of Ce₂Ni₇-type La–Mg–Ni-based alloys

Social activity

Search articles by author

Spotlight

Advertisements