Improving hydrogen-induced crystallization and electrochemical hydrogen storage properties of MgNi amorphous alloy with CoB addition

时间:2023-05-25作者:浏览量:10


Improving hydrogen-induced crystallization and electrochemical hydrogen storage properties of MgNi amorphous alloy with CoB addition

作者:Guo, MC (Guo, Mengcheng) ; Wang, H (Wang, Hui) [1] ; Liu, JW (Liu, Jiangwen) ; Ouyang, LZ (Ouyang, Liuzhang)

 (由 Clarivate 提供) 

卷588

文献号121646

DOI10.1016/j.jnoncrysol.2022.121646

出版时间JUL 15 2022

在线发表APR 2022

已索引2022-05-22

文献类型Article

摘要

Amorphous MgNi-based alloy demonstrates the potential to be a candidate for Ni-MH battery anode materials due to its low cost and high capacity. However, the poor cyclic performance limits its practical application, which was predominantly attributed to the electrochemical oxidization of Mg in alkaline electrolytes. In this work, the amorphous CoB was added to successfully enhance the structural stability and cyclic performance of the amorphous MgNi alloy electrode. For the milled MgNi mixture containing 5 wt% CoB, the capacity maintains 174.8 +/- 7.6 mAh/g after 30 cycles, increasing ~114.6 mAh/g than pure MgNi. DSC and TG results indicate that the CoB addition can greatly increase the crystallization temperature of amorphous MgNi, implying higher resistance to hydrogen-induced crystallization in the charge/discharge cycles of MgNi amorphous alloy electrodes. As a result, the amorphous composite structure could effectively improve the electrochemical performances of amorphous MgNi alloys.


关键词

作者关键词Amorphous MgNi alloysNi-MH anodeHydrogen-induced crystallizationCyclic performance

Keywords PlusHYDRIDING PROPERTIESCYCLE LIFENIELECTRODETIMG2NIMICROSTRUCTURESSUBSTITUTIONDEGRADATIONPERFORMANCE

作者信息

通讯作者地址

Wang, Hui

(通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China

地址

1 South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China

2 South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Peoples R China

电子邮件地址mehwang@scut.edu.cn

类别/分类

研究方向Materials Science

引文主题

2 Chemistry

2.282 Hydrogen Chemistry & Storage

2.282.594 Hydrogen Storage

Sustainable Development Goals

07 Affordable and Clean Energy

Web of Science 类别Materials Science, CeramicsMaterials Science, Multidisciplinary