Nanocrystalline structure and electrochemical hydrogen storage properties of the as-milled Mg-V-Ni-Fe-Zn-based materials

被引：11

作者：

Bu, Wengang ^{[1
]}

Peng, Wenlian ^{[1
]}

Liu, Qinghai ^{[1
]}

Li, Lei ^{[1
]}

Li, Wei ^{[1
]}

Dai, Xiaodong ^{[1
]}

机构：

[1] State Key Lab NBC Protect Civilian, Beijing 102205, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2023年 / 48卷 / 19期

关键词：

V substitution for Mg; Mg-Ni based alloy; Electro-chemical characteristic; Ball-milling; CYCLE STABILITIES; ALLOYS; ELECTRODE; BEHAVIOR; AL; PERFORMANCES; IMPROVEMENT; CAST; TI; KINETICS;

D O I：

10.1016/j.ijhydene.2022.03.163

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Among the electrode materials for Ni-MH batteries, the Mg alloy electrodes such as MgNi, Mg2Ni, REMg12, La2Mg17 are considered the most suitable anode materials due to their high discharge capacity and low cost. However, the poor electrochemical cycling stability pre-vents its practical application. In this paper, Mg50-xVxNi45Fe3Zn2 (x = 0, 1, 2, 3, 4) + 50 wt% Ni alloys were prepared by partially replacing Mg with V and using mechanical ball milling techniques with amorphous and nanocrystalline structures. Electrochemical tests showed that the ball-milled alloy had good electrochemical uptake and release performance. The maximum release performance is achieved in the first cycle. After that, the discharge level and cycle stability increased significantly with increasing ball grinding time and V content.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：6937 / 6946

页数：10

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