|
|
|
|
Improvement in the Hydrogen-Storage Properties of Mg2Ni by Adding LiBH4
Young Jun Kwak, Myoung Youp Song, Ki-Tae Lee
Korean J. Met. Mater. 2024;62(4):299-305. Published online 2024 Mar 29 DOI: https://doi.org/10.3365/KJMM.2024.62.4.299
Abstract
To improve the hydrogen-storage properties of Mg 2Ni, LiBH 4 was added by milling in hydrogen atmosphere (reactive mechanical milling, RMM). Mg 2Ni-10LiBH 4 was prepared with a composition of 90 wt% Mg 2Ni + 10 wt% LiBH 4. The quantity of released hydrogen (H r) versus temperature T curve for Mg 2Ni10LiBH 4 was obtained by heating at..... More
|
|
|
|
|
|
Improvement in the Hydrogenation and Dehydrogenation Features of Mg by Milling in Hydrogen with Vanadium Chloride
수소 분위기에서 Mg와 VCl3의 밀링에 의한 Mg의 수소 흡수 방출 특성의 향상
Myoung Youp Song, Seong Ho Lee, Young Jun Kwak송명엽, 이성호, 곽영준
Korean J. Met. Mater. 2021;59(10):709-717. Published online 2021 Sep 6 DOI: https://doi.org/10.3365/KJMM.2021.59.10.709
Abstract
VCl 3 (vanadium (III) chloride) was selected as an additive to Mg to increase the hydrogenation and dehydrogenation rates and the hydrogen storage capacity of Mg. Instead of MgH 2, Mg was used as a starting material since Mg is cheaper than MgH 2. Samples with a composition of 95 wt% Mg +..... More
|
|
|
|
|
|
Improvement of the Hydrogen-Release Features of Mg-Graphene Composite
by Adding Nickel via Reactive Ball Milling
Eunho Choi, Young Jun Kwak, Myoung Youp Song
Korean J. Met. Mater. 2019;57(10):663-672. Published online 2019 Sep 6 DOI: https://doi.org/10.3365/KJMM.2019.57.10.663
Abstract
The dehydrogenation rates of graphene-added Mg (named Mg-5graphene) were very low at 573 K and 593 K. Ni was added to increase the dehydrogenation rates of graphene-added Mg. Samples (designated as Mg-2.5Ni-2.5graphene) with a composition of 95 wt% Mg + 2.5 wt% Ni + 2.5 wt% graphene were prepared by..... More
|
|
|
|
|
|
Effects of Zn(BH4)2, Ni, and/or Ti Doping on the Hydrogen-Storage Features of MgH2
Myoung Youp Song, Young Jun Kwak
Korean J. Met. Mater. 2019;57(3):176-183. Published online 2019 Feb 8 DOI: https://doi.org/10.3365/KJMM.2019.57.3.176
Abstract
In the present work, MgH2 was doped with Zn(BH4)2, Ni, and/or Ti to improve its hydrogen absorption and release features. Samples were prepared by grinding in a planetary ball mill in a hydrogen atmosphere. To increase the hydrogen absorption and release rates without significantly sacrificing hydrogenstorage capacity the additive percentages..... More
|
|
|
|
|
|
Hydrogen Storage Properties of Mg Alloy Prepared by Incorporating Polyvinylidene Fluoride via Reactive Milling
Myoung Youp Song, Young Jun Kwak
Korean J. Met. Mater. 2018;56(12):878-884. Published online 2018 Dec 5 DOI: https://doi.org/10.3365/KJMM.2018.56.12.878
Abstract
In the present work, we selected a polymer, polyvinylidene fluoride (PVDF), as an additive to improve the hydrogenation and dehydrogenation properties of Mg. 95 wt% Mg + 5 wt% PVDF (designated Mg-5PVDF) samples were prepared via milling in hydrogen atmosphere (reactive milling), and the hydrogenation and dehydrogenation characteristics of the..... More
|
|
|
|
|
|
Raising the Dehydrogenation Rate of a Mg-CMC (Carboxymethylcellulose, Sodium Salt) Composite by Alloying Ni via Hydride-Forming Milling
Myoung Youp Song, Eunho Choi, Young Jun Kwak
Korean J. Met. Mater. 2018;56(8):620-627. Published online 2018 Aug 5 DOI: https://doi.org/10.3365/KJMM.2018.56.8.620
Abstract
In our previous work, samples with a composition of 95 wt% Mg + 5 wt% CMC (Carboxymethylcellulose, Sodium Salt, [C 6H 7O 2(OH) x(C 2H 2O 3Na) y] n) (named Mg-5 wt%CMC) were prepared through hydride-forming milling. Mg-5 wt%CMC had a very high hydrogenation rate but a low dehydrogenation rate. Addition of Ni to Mg is known to increase..... More
|
|
|
|
|
|
Hydrogen Uptake and Release Characteristics of Mg-xTaF5-xVCl3 (x=1.25, 2.5, and 5)
Myoung Youp Song, Young Jun Kwak
Korean J. Met. Mater. 2018;56(8):611-619. Published online 2018 Aug 5 DOI: https://doi.org/10.3365/KJMM.2018.56.8.611
Abstract
TaF 5 and VCl 3 were chosen as additives to enhance the hydrogen uptake and release rates of Mg. The total content of the additives was not more than 10 wt% since too high content reduces the fraction of Mg and thus the hydrogen storage capacity of the alloys. Samples with compositions..... More
|
|
|
|
|
|
Hydrogen Storage Properties of Mg-Graphene Composites
Myoung Youp Song, Young Jun Kwak, Eunho Choi
Korean J. Met. Mater. 2018;56(7):524-531. Published online 2018 Jul 5 DOI: https://doi.org/10.3365/KJMM.2018.56.7.524
Abstract
To improve the hydrogen uptake and release properties of magnesium (Mg), five weight percent of graphene was added to pre-milled Mg by milling in hydrogen (reaction-involving milling). The hydrogen uptake and release properties of the graphene-added Mg (named Mg-5graphene) were investigated. Premilling of Mg (for 24 h) and then adding..... More
|
|
|
|
|
|
Development of a Mg-Based Alloy with a Hydrogen-Storage Capacity of 7 wt% by Adding a Polymer CMC via Transformation-Involving Milling
Myoung Youp Song, Eunho Choi, Young Jun Kwak
Korean J. Met. Mater. 2018;56(5):392-399. Published online 2018 May 8 DOI: https://doi.org/10.3365/KJMM.2018.56.5.392
Abstract
The addition of CMC (Carboxymethylcellulose, Sodium Salt) may improve the hydriding and dehydriding properties of Mg since it has a relatively low melting point and the melting of CMC during transformation-involving milling may put the milled samples in good states to absorb and release hydrogen rapidly. Samples with compositions of..... More
|
|
|
|
|
|
Comparison of the Hydrogen Release Properties of Zn(BH4)2-Added MgH2 Alloy and Zn(BH4)2 and Ni-Added MgH2 Alloy
Myoung Youp Song, Young Jun Kwak
Korean J. Met. Mater. 2018;56(3):244-251. Published online 2018 Mar 6 DOI: https://doi.org/10.3365/KJMM.2018.56.3.244
Abstract
Samples with compositions of 99 w/o MgH 2+1 w/o Zn(BH 4) 2 (designated MgH 2-1Zn(BH 4) 2) and 96 w/o MgH 2+2 w/o Zn(BH 4) 2+2 w/o Ni (designated MgH 2-2Zn(BH 4) 2-2Ni) were prepared by milling in a planetary ball mill in a hydrogen atmosphere (reaction-involving milling). The hydrogen release properties of MgH 2- 1Zn(BH 4) 2 and MgH 2-2Zn(BH 4) 2-2Ni were compared. A larger quantity..... More
|
|
|
|
|
|
Enhancement of the Hydrogen-Storage Characteristics of Mg by Adding Mg2Ni and Ni to MgH2 via High Energy Ball Milling in Hydrogen Atmosphere
Seong-Hyeon Hong, Young Jun Kwak, Myoung Youp Song
Korean J. Met. Mater. 2018;56(1):59-65. Published online 2018 Jan 1 DOI: https://doi.org/10.3365/KJMM.2018.56.1.59
Abstract
In this work, Mg 2Ni and Ni were added to MgH 2 in order to improve the hydrogen-storage properties of Mg. A 94 wt% MgH 2+5 wt% Mg 2Ni+1wt% Ni (named 94MgH 2+5Mg 2Ni+1Ni) sample was prepared by milling in a hydrogen atmosphere in a planetary ball mill for 5 h. The Mg 2Ni was hydrided during..... More
|
|
|
|
|
|
Increase in the Hydrogen-Sorption Rates and the Hydrogen-Storage Capacity of MgH2 by Adding a Small Proportion of Zn(BH4)2
Hye Ryoung Park, Young Jun Kwak, Myoung Youp Song
Korean J. Met. Mater. 2017;55(9):657-663. Published online 2017 Aug 30 DOI: https://doi.org/10.3365/KJMM.2017.55.9.657
Abstract
Abstract: In this work, Zn(BH 4) 2 was added to improve the hydrogen-storage properties of MgH 2. A 99 wt% MgH 2+1 wt% Zn(BH 4) 2 sample was prepared by milling in a planetary ball mill in a hydrogen atmosphere. The proportion of the added Zn(BH 4) 2 was small (1 wt%) in order to increase hydriding and..... More
|
|
|
|
|
|
Hydrogen Sorption of Pure Mg and Niobium (V) Fluoride-Added Mg Alloys Prepared by Planetary Ball Milling in Hydrogen
Hye Ryoung Park, Young Jun Kwak, Seong Ho Lee, Myoung Youp Song
Korean J. Met. Mater. 2016;54(12):916-924. Published online 2016 Dec 5 DOI: https://doi.org/10.3365/KJMM.2016.54.12.916
Abstract
In this work, niobium (V) fluoride was selected as an additive to heighten the hydrogen sorption rates of Mg. Specimens of pure Mg, 5 wt% niobium fluoride－added Mg, and 10 wt% niobium fluoride-added Mg were prepared by planetary ball milling in hydrogen. The hydrogen sorption properties of the specimens were..... More
|
|
> Browse Articles > Search
