Microstructures and hydrogen storage properties of La Ni Fe V Mn alloys

Kunce, Izabela; Polański, Marek; Czujko, Tomasz

doi:10.1016/j.ijhydene.2017.09.039

Cited by 78 publications

(36 citation statements)

References 45 publications

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“…For instance, the lasermanufactured LaFeNiMnV showed a primary two-phase structure that changed from initial s + La(NiMn) 5 to fcc + La(NiMn) 5 phases, with a maximum hydrogen storage capacity of 0.83 wt%. 104 Multiphase (FeV) 60 (CoTiCr) 40Àx Zr x (0 r x r 2) alloys can quickly absorb hydrogen without any activation process, even at room temperature. 105 For improvements of the hydrogen absorption/ desorption kinetics, Ti was substituted by Zr, which can help reduce the microstrain accumulation during the cycles.…”

Section: Reviewmentioning

confidence: 99%

High-entropy energy materials: challenges and new opportunities

Wang

et al. 2021

Energy Environ. Sci.

493

239

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Section: Reviewmentioning

confidence: 99%

High-entropy energy materials: challenges and new opportunities

Wang

et al. 2021

Energy Environ. Sci.

493

239

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“…It is expected that the HEA-concept will allow a larger degree of tunability in the properties of the corresponding metal hydrides. However, hydrogen storage in HEAs is still in its infancy with only a few reported studies [9][10][11][12][13][14][15][16][17][18][19] was placed inside an alumina crucible equipped with a pierced lid. The measurement was then conducted under flowing Ar at 50 mL/min.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen storage in high-entropy alloys with varying degree of local lattice strain

Nygård

Karlsson

et al. 2019

International Journal of Hydrogen Energy

106

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We have investigated the structure and hydrogenation properties of a series of Ti, V, Zr, Nb and Ta based high-entropy alloys (HEAs) with varying degree of local lattice strain by means of synchrotron radiation X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry and manometric measurements in a Sieverts apparatus. The obtained alloys have body-centred cubic (bcc) crystal structures and form face-centred cubic (fcc) hydrides with hydrogen-to-metal ratios close to 2. No correlation between the hydrogen storage capacity and the local lattice strain δr is observed in this work. Both bcc and fcc unit cells expand linearly with the zirconium-to-metal ratio [Zr]/[M], and increased concentration of Zr stabilizes the hydrides. When heated, the hydrides decompose into the original bcc alloys if [Zr]/[M]<12.5 at.%. The hydrides phase-separate in a hydrogen-induced decomposition type process for [Zr]/[M]≥12.5 at.%. The result is then a combination of two bcc phases, one with a larger and

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“…High-entropy alloys, which were proposed by Yeh et al [15] in 2004, were designed using a completely new concept and synthesized by mixing five or more metallic elements to form a single phase alloy with a BCC or FCC crystal structure [8,16,17,18,19,20,21]. Recently, HEAs have received significant attention in the hydrogen storage field due to their excellent hydrogenation properties, including superior hydrogen storage capacity and good thermal stability [22,23,24,25,26,27].…”

Section: Introductionmentioning

confidence: 99%

“…Sahlberg et al [22] proposed that a TiVZrNbHf alloy has a maximum hydrogen storage capacity of 2.7 wt.% and has a high thermal stability of 500 °C for its hydride [8,22]. Kunce et al synthesized ZrTiVCrFeNi [26], TiZrNbMoV [27] and La-Ni-Fe-V-Mn [20] HEAs using the laser engineered net-shaping technology and studied the correlation of their hydrogenation performance with annealing temperature, fabrication parameters and chemical composition, respectively. Zepon et al [25] reported that a MgZrTiFe 0.5 Co 0.5 Ni 0.5 alloy processed by high-energy ball milling under argon and hydrogen atmospheres was capable of absorbing up to 1.2 wt.% of hydrogen.…”

Section: Introductionmentioning

confidence: 99%

A Novel TiZrHfMoNb High-Entropy Alloy for Solar Thermal Energy Storage

Shen

Zhang

et al. 2019

Nanomaterials

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An equiatomic TiZrHfMoNb high-entropy alloy (HEA) was developed as a solar thermal energy storage material due to its outstanding performance of hydrogen absorption. The TiZrHfMoNb alloy transforms from a body-centered cubic (BCC) structure to a face-centered cubic (FCC) structure during hydrogen absorption and can reversibly transform back to the BCC structure after hydrogen desorption. The theoretical calculations demonstrated that before hydrogenation, the BCC structure for the alloy has more stable energy than the FCC structure while the FCC structure is preferred after hydrogenation. The outstanding hydrogen absorption of the reversible single-phase transformation during the hydrogen absorption–desorption cycle improves the hydrogen recycling rate and the energy efficiency, which indicates that the TiZrHfMoNb alloy could be an excellent candidate for solar thermal energy storage.

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Microstructures and hydrogen storage properties of La Ni Fe V Mn alloys

Cited by 78 publications

References 45 publications

High-entropy energy materials: challenges and new opportunities

High-entropy energy materials: challenges and new opportunities

Hydrogen storage in high-entropy alloys with varying degree of local lattice strain

A Novel TiZrHfMoNb High-Entropy Alloy for Solar Thermal Energy Storage

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