Effects of Boron Addition on Structural and Electrochemical Properties of La-Mg-Ni-Co System Hydrogen Storage Electrode Alloys

He Miao; Mingxia Gao; Danfeng Li; Feng Xu; Yan Lin; Kai Zhong; Hongge Pan

doi:10.1016/s1875-5372(10)60017-3

Effects of Boron Addition on Structural and Electrochemical Properties of La-Mg-Ni-Co System Hydrogen Storage Electrode Alloys

He Miao^*
, Mingxia Gao
, Danfeng Li
, Feng Xu
, Yan Lin
, Kai Zhong
, Hongge Pan

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

4 Citations (Scopus)

Abstract

The structural and electrochemical properties of La_0.7Mg_0.3 Ni_2.65Co_0.75Mn_0.1Al_0.2 B_x(x=0-0.08) hydrogen storage electrode alloys were investigated systematically. The results from XRD show that all of the alloys consist of a (La, Mg)Ni₃ phase and a LaNi₅ phase. With the increase of B content, the abundance of the (La, Mg)Ni₃ phase increases, accordingly that of the LaNi₅ phase decreases, and the cell volumes of the two phases decrease. Electrochemical studies indicate that B addition can effectively improve the high rate dischargeability (HRD) of the alloy electrode, and the optimal value of HRD₁₀₀₀ reaches 57.1% as x being 0.04. With the addition of small amount of B, the cycling stability and activation properties of the alloy electrodes keep almost unchanged, but the maximum discharge capacity (C_max) decreases. In addition, the electrochemical kinetics investigations including the linear polarization and anodic polarization were also performed in detail.

Original language	English
Pages (from-to)	193-197
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	38
Issue number	2
DOIs	https://doi.org/10.1016/s1875-5372(10)60017-3
Publication status	Published - Feb 2009
Externally published	Yes

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SDG 7 Affordable and Clean Energy

Research Keywords

Electrochemical properties
Hydrogen storage alloys
La-Mg-Ni-based hydrides
Structure

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10.1016/s1875-5372(10)60017-3

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@article{7aa531878d1c4913a36a9b5e4d64db03,

title = "Effects of Boron Addition on Structural and Electrochemical Properties of La-Mg-Ni-Co System Hydrogen Storage Electrode Alloys",

abstract = "The structural and electrochemical properties of La0.7Mg0.3 Ni2.65Co0.75Mn0.1Al0.2 Bx(x=0-0.08) hydrogen storage electrode alloys were investigated systematically. The results from XRD show that all of the alloys consist of a (La, Mg)Ni3 phase and a LaNi5 phase. With the increase of B content, the abundance of the (La, Mg)Ni3 phase increases, accordingly that of the LaNi5 phase decreases, and the cell volumes of the two phases decrease. Electrochemical studies indicate that B addition can effectively improve the high rate dischargeability (HRD) of the alloy electrode, and the optimal value of HRD1000 reaches 57.1\% as x being 0.04. With the addition of small amount of B, the cycling stability and activation properties of the alloy electrodes keep almost unchanged, but the maximum discharge capacity (Cmax) decreases. In addition, the electrochemical kinetics investigations including the linear polarization and anodic polarization were also performed in detail.",

keywords = "Electrochemical properties, Hydrogen storage alloys, La-Mg-Ni-based hydrides, Structure, Electrochemical properties, Hydrogen storage alloys, La-Mg-Ni-based hydrides, Structure, Electrochemical properties, Hydrogen storage alloys, La-Mg-Ni-based hydrides, Structure",

author = "He Miao and Mingxia Gao and Danfeng Li and Feng Xu and Yan Lin and Kai Zhong and Hongge Pan",

year = "2009",

month = feb,

doi = "10.1016/s1875-5372(10)60017-3",

language = "English",

volume = "38",

pages = "193--197",

journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

issn = "1002-185X",

publisher = "NORTHWEST INST NONFERROUS METAL RESEARCH",

number = "2",

}

Effects of Boron Addition on Structural and Electrochemical Properties of La-Mg-Ni-Co System Hydrogen Storage Electrode Alloys. / Miao, He; Gao, Mingxia; Li, Danfeng et al.
In: Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering, Vol. 38, No. 2, 02.2009, p. 193-197.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Effects of Boron Addition on Structural and Electrochemical Properties of La-Mg-Ni-Co System Hydrogen Storage Electrode Alloys

AU - Miao, He

AU - Gao, Mingxia

AU - Li, Danfeng

AU - Xu, Feng

AU - Lin, Yan

AU - Zhong, Kai

AU - Pan, Hongge

PY - 2009/2

Y1 - 2009/2

N2 - The structural and electrochemical properties of La0.7Mg0.3 Ni2.65Co0.75Mn0.1Al0.2 Bx(x=0-0.08) hydrogen storage electrode alloys were investigated systematically. The results from XRD show that all of the alloys consist of a (La, Mg)Ni3 phase and a LaNi5 phase. With the increase of B content, the abundance of the (La, Mg)Ni3 phase increases, accordingly that of the LaNi5 phase decreases, and the cell volumes of the two phases decrease. Electrochemical studies indicate that B addition can effectively improve the high rate dischargeability (HRD) of the alloy electrode, and the optimal value of HRD1000 reaches 57.1% as x being 0.04. With the addition of small amount of B, the cycling stability and activation properties of the alloy electrodes keep almost unchanged, but the maximum discharge capacity (Cmax) decreases. In addition, the electrochemical kinetics investigations including the linear polarization and anodic polarization were also performed in detail.

AB - The structural and electrochemical properties of La0.7Mg0.3 Ni2.65Co0.75Mn0.1Al0.2 Bx(x=0-0.08) hydrogen storage electrode alloys were investigated systematically. The results from XRD show that all of the alloys consist of a (La, Mg)Ni3 phase and a LaNi5 phase. With the increase of B content, the abundance of the (La, Mg)Ni3 phase increases, accordingly that of the LaNi5 phase decreases, and the cell volumes of the two phases decrease. Electrochemical studies indicate that B addition can effectively improve the high rate dischargeability (HRD) of the alloy electrode, and the optimal value of HRD1000 reaches 57.1% as x being 0.04. With the addition of small amount of B, the cycling stability and activation properties of the alloy electrodes keep almost unchanged, but the maximum discharge capacity (Cmax) decreases. In addition, the electrochemical kinetics investigations including the linear polarization and anodic polarization were also performed in detail.

KW - Electrochemical properties

KW - Hydrogen storage alloys

KW - La-Mg-Ni-based hydrides

KW - Structure

KW - Electrochemical properties

KW - Hydrogen storage alloys

KW - La-Mg-Ni-based hydrides

KW - Structure

KW - Electrochemical properties

KW - Hydrogen storage alloys

KW - La-Mg-Ni-based hydrides

KW - Structure

UR - https://www.scopus.com/pages/publications/65149086537

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-65149086537&origin=recordpage

U2 - 10.1016/s1875-5372(10)60017-3

DO - 10.1016/s1875-5372(10)60017-3

M3 - RGC 21 - Publication in refereed journal

SN - 1002-185X

VL - 38

SP - 193

EP - 197

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 2

ER -

Effects of Boron Addition on Structural and Electrochemical Properties of La-Mg-Ni-Co System Hydrogen Storage Electrode Alloys

Abstract

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