Hydrogen storage and electrochemical characteristics of Ti 0.32Cr 0.43 - XV 0.25Fe x (x = 0-0.08) alloys and its composites with LmNi 4.1Al 0.25Mn 0.3Co 0.65 alloy

Han Sol Park; Muralidhar Chourashiya; Dong Cheol Yang; Choong Nyeon Park; Chan Jin Park

doi:10.1016/j.jallcom.2011.11.010

Hydrogen storage and electrochemical characteristics of Ti _0.32Cr _{0.43 - X}V _0.25Fe _x (x = 0-0.08) alloys and its composites with LmNi _4.1Al _0.25Mn _0.3Co _0.65 alloy

Han Sol Park, Muralidhar Chourashiya, Dong Cheol Yang, Choong Nyeon Park, Chan Jin Park^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

This study examined the hydrogen storage and electrochemical characteristics of bcc type Ti _0.32Cr _{0.43 - x}V _0.25Fe _x (x = 0-0.08) alloys and their ball-milled composites with AB ₅ type LmNi ₄₁Al _0.25Mn _0.3Co _0.65 alloy. With increasing Fe content in the bcc alloy, the hydrogen storage capacity decreased and the plateau pressure increased due to the decreased lattice volume. In addition, the plateau pressure of the bcc alloys decreased with decrease in its temperature. The discharge capacity of the composite alloys of bcc and AB ₅ alloy decreased with increasing Fe content in the bcc alloy at 25 °C, attributed to the increased plateau pressure. On the other hand, at low temperatures, the discharge capacity of the Fe-doped composite alloys was higher than that of the un-doped alloy due to the catalytic effect of Fe. In addition, with increasing discharge rate, the Fe-doped composite alloys with improved surface catalytic activity showed better discharge capacity.

Original language	English
Pages (from-to)	566-572
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	513
DOIs	https://doi.org/10.1016/j.jallcom.2011.11.010
State	Published - 5 Feb 2012
Externally published	Yes

Keywords

Ball-milling
Discharge capacity
Fe substitution
Hydrogen storage
Plateau pressure
Surface catalytic activity
Ti-Cr-V alloy

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10.1016/j.jallcom.2011.11.010

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title = "Hydrogen storage and electrochemical characteristics of Ti 0.32Cr 0.43 - XV 0.25Fe x (x = 0-0.08) alloys and its composites with LmNi 4.1Al 0.25Mn 0.3Co 0.65 alloy",

abstract = "This study examined the hydrogen storage and electrochemical characteristics of bcc type Ti 0.32Cr 0.43 - xV 0.25Fe x (x = 0-0.08) alloys and their ball-milled composites with AB 5 type LmNi 41Al 0.25Mn 0.3Co 0.65 alloy. With increasing Fe content in the bcc alloy, the hydrogen storage capacity decreased and the plateau pressure increased due to the decreased lattice volume. In addition, the plateau pressure of the bcc alloys decreased with decrease in its temperature. The discharge capacity of the composite alloys of bcc and AB 5 alloy decreased with increasing Fe content in the bcc alloy at 25 °C, attributed to the increased plateau pressure. On the other hand, at low temperatures, the discharge capacity of the Fe-doped composite alloys was higher than that of the un-doped alloy due to the catalytic effect of Fe. In addition, with increasing discharge rate, the Fe-doped composite alloys with improved surface catalytic activity showed better discharge capacity.",

keywords = "Ball-milling, Discharge capacity, Fe substitution, Hydrogen storage, Plateau pressure, Surface catalytic activity, Ti-Cr-V alloy",

author = "Park, {Han Sol} and Muralidhar Chourashiya and Yang, {Dong Cheol} and Park, {Choong Nyeon} and Park, {Chan Jin}",

note = "Funding Information: This study was financially supported by the Ministry of Education, Science Technology (MEST) and National Research Foundation of Korea (NRF) through the Basic Research Laboratories (BRL) Program ( 2011-0001567 ) and the Human Resource Training Project for Regional Innovation .",

year = "2012",

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doi = "10.1016/j.jallcom.2011.11.010",

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volume = "513",

pages = "566--572",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

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T1 - Hydrogen storage and electrochemical characteristics of Ti 0.32Cr 0.43 - XV 0.25Fe x (x = 0-0.08) alloys and its composites with LmNi 4.1Al 0.25Mn 0.3Co 0.65 alloy

AU - Park, Han Sol

AU - Chourashiya, Muralidhar

AU - Yang, Dong Cheol

AU - Park, Choong Nyeon

AU - Park, Chan Jin

N1 - Funding Information: This study was financially supported by the Ministry of Education, Science Technology (MEST) and National Research Foundation of Korea (NRF) through the Basic Research Laboratories (BRL) Program ( 2011-0001567 ) and the Human Resource Training Project for Regional Innovation .

PY - 2012/2/5

Y1 - 2012/2/5

N2 - This study examined the hydrogen storage and electrochemical characteristics of bcc type Ti 0.32Cr 0.43 - xV 0.25Fe x (x = 0-0.08) alloys and their ball-milled composites with AB 5 type LmNi 41Al 0.25Mn 0.3Co 0.65 alloy. With increasing Fe content in the bcc alloy, the hydrogen storage capacity decreased and the plateau pressure increased due to the decreased lattice volume. In addition, the plateau pressure of the bcc alloys decreased with decrease in its temperature. The discharge capacity of the composite alloys of bcc and AB 5 alloy decreased with increasing Fe content in the bcc alloy at 25 °C, attributed to the increased plateau pressure. On the other hand, at low temperatures, the discharge capacity of the Fe-doped composite alloys was higher than that of the un-doped alloy due to the catalytic effect of Fe. In addition, with increasing discharge rate, the Fe-doped composite alloys with improved surface catalytic activity showed better discharge capacity.

AB - This study examined the hydrogen storage and electrochemical characteristics of bcc type Ti 0.32Cr 0.43 - xV 0.25Fe x (x = 0-0.08) alloys and their ball-milled composites with AB 5 type LmNi 41Al 0.25Mn 0.3Co 0.65 alloy. With increasing Fe content in the bcc alloy, the hydrogen storage capacity decreased and the plateau pressure increased due to the decreased lattice volume. In addition, the plateau pressure of the bcc alloys decreased with decrease in its temperature. The discharge capacity of the composite alloys of bcc and AB 5 alloy decreased with increasing Fe content in the bcc alloy at 25 °C, attributed to the increased plateau pressure. On the other hand, at low temperatures, the discharge capacity of the Fe-doped composite alloys was higher than that of the un-doped alloy due to the catalytic effect of Fe. In addition, with increasing discharge rate, the Fe-doped composite alloys with improved surface catalytic activity showed better discharge capacity.

KW - Ball-milling

KW - Discharge capacity

KW - Fe substitution

KW - Hydrogen storage

KW - Plateau pressure

KW - Surface catalytic activity

KW - Ti-Cr-V alloy

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U2 - 10.1016/j.jallcom.2011.11.010

DO - 10.1016/j.jallcom.2011.11.010

M3 - 文章

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SN - 0925-8388

VL - 513

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Hydrogen storage and electrochemical characteristics of Ti _0.32Cr _{0.43 - X}V _0.25Fe _x (x = 0-0.08) alloys and its composites with LmNi _4.1Al _0.25Mn _0.3Co _0.65 alloy

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