Hydrogen storage properties of vanadium-based b.c.c. solid solution metal hydrides

Seo, Chan-Yeol; Kim, Jin-Ho; Lee, Paul S.; Jai-Young, Lee

doi:10.1016/s0925-8388(02)00831-9

Cited by 81 publications

(31 citation statements)

References 9 publications

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“…Miao et al [14] found that all of the alloys Ti 0.8 Zr 0.2 V 2.7 Mn 0.5 Cr 0.8−x Ni 1.25 Fe x (x = 0.0-0.8) mainly consisted of two phases, the C14 Laves phase with a three-dimensional network and the dendritic V-based solid solution phase. Further, the lattice parameters of the two phases and the maximum discharge capacity decreased with an increase in Fe content, but the cyclic stability and the high rate dischargeability increased first and then decreased with increasing x. Liu et al [15] found that Ce addition favored the chemical homogeneity of the BCC phase and, therefore, improved the hydrogen storage properties of the (Ti 0.267 Cr 0.333 V 0.40 ) 93 Fe 7 Ce x (x = 0, 0.4, 1.1 and 2.0 at%) alloys. To increase the hydrogen storage capacity and the plateau pressure of the Ti 0.32 Cr 0.43 V 0.25 alloy, Yoo et al [16] replaced a fraction of the Cr with Mn or a combination of Mn and Fe.…”

Section: Introductionmentioning

confidence: 99%

“…Some of the identified shortcomings of these alloys include poor pressure-composition-temperature (PCT) plateau characteristics, low hydrogen desorption capacities, and long activation times [4][5][6][7]. In an attempt to improve on these shortcomings, controlled quantities of additives such as Fe, Zr, and Mn have been found to be effective in lowering cost and enhancing the overall performance of the alloy [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Storage Characteristics and Corrosion Behavior of Ti24V40Cr34Fe2 Alloy

et al. 2017

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Abstract:In this work, we investigated the effects of heat treatment on the microstructure, hydrogen storage characteristics and corrosion rate of a Ti 34 V 40 Cr 24 Fe 2 alloy. The arc melted alloy was divided into three samples, two of which were separately quartz-sealed under vacuum and heated to 1000 • C for 1 h; one of these samples was quenched and the other furnace-cooled to ambient temperature. The crystal structures of the samples were studied via X-ray diffractometry and scanning electron microscopy. Hydrogenation/dehydrogenation characteristics were investigated using a Sievert apparatus. Potentiostat corrosion tests on the alloys were performed using an AutoLab ® corrosion test apparatus and electrochemical cell. All samples exhibited a major body-center-cubic (BCC) and some secondary phases. An abundance of Laves phases that were found in the as-cast sample reduced with annealing and disappeared in the quenched sample. Beside suppressing Laves phase, annealing also introduced a Ti-rich phase. The corrosion rate, maximum absorption, and useful capacities increased after both heat treatments. The annealed sample had the highest absorption and reversible capacity. The plateau pressure of the as-cast alloy increased after quenching. The corrosion rate increased from 0.0004 mm/y in the as-cast sample to 0.0009 mm/y after annealing and 0.0017 mm/y after quenching.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrogen Storage Characteristics and Corrosion Behavior of Ti24V40Cr34Fe2 Alloy

et al. 2017

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“…Some of the identified shortcomings of these alloys include poor pressure-concertation-temperature (PCT) plateau characteristics, low hydrogen desorption capacities, and long activation times [4][5][6][7]. In an attempt to improve on these shortcomings, controlled quantities of additives such as Fe, Zr and Mn have been found to be effective in lowering cost and enhancing the overall performance of the alloy [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Storage Characteristics and Corrosion Behavior of V-rich Ti-V-Cr-Fe Alloy

Abdul¹,

Chown²,

Odusote³

et al. 2017

Preprint

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Abstract:In this work, we investigated the effects of heat treatment on the microstructure, hydrogen storage characteristics and corrosion rate of a Ti34V40Cr24Fe2 alloy. The arc melted alloy was divided into three samples, two of which were separately quartz-sealed under vacuum and heated to 1000 °C for 1 h; one of these samples was quenched and the other furnace cooled to ambient temperature. The crystal structures of the samples were studied via X-ray diffractometry and scanning electron microscopy. Absorption/desorption characteristics were investigated using a Sievert apparatus. Potentiostat corrosion tests on the alloys were performed using an AutoLab ® corrosion test apparatus and electrochemical cell. All samples exhibited a mixture of body-center-cubic (BCC) and Laves phase structures. The corrosion rate, maximum absorption, and useful capacities increased after both heat treatments. The annealed sample had the highest absorption and reversible capacity. The plateau pressure of the as-cast alloy increased after quenching. The corrosion rate increased from 0.0004 mm/y in as-cast sample to 0.0009 mm/y after annealing and 0.0017 mm/y after quenching, due to a decrease in the Cr-content of the C14 phase.

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“…[1] Another promising application of vanadium based alloys is in energy storage such as hydrogen storage in extremely high working temperature. [2] Furthermore, vanadium is used primarily as an alloying agent in steel (ferrovanadium) for an increase in tensile strength and high temperature strength in addition to its ''grain refining and dispersion hardening effect'' on tempered steel. [3] In addition, it is also alloyed with titanium to obtain ''good strength properties at room temperature and good creep resistance.''…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Assessment of V-Rare Earth Systems

Chan

Gao

Doğan

et al. 2010

J. Phase Equilib. Diffus.

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Vanadium is a refractory metal with high melting point (1910°C) that has good structural strength, good room-temperature corrosion resistance, and low thermal neutron-absorption cross section. Vanadium is primarily used as a steel additive to improve the strength of steels by forming stable nitrides and carbides. Addition of yttrium to vanadium alloys can improve the oxidation resistance and mechanical properties. In this work, three binary systems, V-Ce, V-La, and V-Y, were thermodynamically assessed based on the ASM Binary Alloy Phase Diagrams using CALPHAD approach. Self-consistent thermodynamic descriptions for all three systems were obtained.

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Hydrogen storage properties of vanadium-based b.c.c. solid solution metal hydrides

Cited by 81 publications

References 9 publications

Hydrogen Storage Characteristics and Corrosion Behavior of Ti24V40Cr34Fe2 Alloy

Hydrogen Storage Characteristics and Corrosion Behavior of Ti24V40Cr34Fe2 Alloy

Hydrogen Storage Characteristics and Corrosion Behavior of V-rich Ti-V-Cr-Fe Alloy

Thermodynamic Assessment of V-Rare Earth Systems

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