A novel capacitive device for the study of volumetric expansion of hydride powders

Ribeiro, Edivagner S.; Gil, J. M.

doi:10.1016/j.ijhydene.2015.08.063

Cited by 12 publications

(3 citation statements)

References 35 publications

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“…Note that the measured values include free spaces, and the possible porosity change was not taken into account. Ribeiro and Gil [18] investigated the porosity during the swelling of LaNi 5 powder through the measurement of electrical resistance, showing that it decreased by ~1% under 11 MPa. The negative value below 0.118 MPa during the discharge was caused by the porosity change.…”

Section: Resultsmentioning

confidence: 99%

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Suitability Evaluation of LaNi5 as Hydrogen-Storage-Alloy Actuator by In-Situ Displacement Measurement during Hydrogen Pressure Change

et al. 2019

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The swelling ability of LaNi5 for application to hydrogen-storage-alloy (HSA) actuator is discussed through the measurement of the swelling ratio in hydrogen. The HSA actuator is driven by hydrogen pressure change causing the swelling of HSA. LaNi5 is one of the candidate materials for HSA actuators as well as palladium. Some prototypes of HSA actuators using LaNi5 have been fabricated; however, the kinetic swelling ability of LaNi5 itself has been not investigated. In this paper, the authors investigated the static and kinetic swelling ability of LaNi5 powder under hydrogen atmosphere. The results showed that the swelling ratio increased by 0.12 at the phase transition pressure. Response time decreased with an increase in the charged pressure during absorption, while it remained constant during discharge. Reaction kinetics revealed that these swelling behaviors were explained by hydrogen absorption and lattice expansion. The swelling ability of LaNi5 was also compared with that of palladium. The results show that LaNi5 swells 1.8 times more than palladium under 0.5 MPa. LaNi5 is suitable for an actuator driven repeatedly under more than the phase transition pressure. Palladium can be used for one-way-operation actuator even under 0.1 MPa since its response time during the evacuation was much longer than during the pressurization.

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Section: Resultsmentioning

confidence: 99%

“…The macroscopic volume change of HSA powder has been investigated, through the deformation of a sample holder [13,14,15], or directly by optical [16,17] and electrical [18,19] techniques. Most of them focused on the static performance from the viewpoints of the effect on a hydrogen tank.…”

Section: Introductionmentioning

confidence: 99%

Suitability Evaluation of LaNi5 as Hydrogen-Storage-Alloy Actuator by In-Situ Displacement Measurement during Hydrogen Pressure Change

et al. 2019

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“…It is also important to investigate the swelling ability during hydrogen absorption in a hydrogen storage alloy itself. Some studies have been performed using powder as a sample, in which various measurement methods were adopted, for example, optically [14,15], electrically [16,17], and with strain gauges on a sample holder [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Deformation mechanism of capsule-type hydrogen-storage-alloy actuator

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Higuchi

et al. 2019

International Journal of Hydrogen Energy

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Kinetics study on the nonlinear modified varying-size model of LaNi5 during hydrogenation/dehydrogenation

Wang

et al. 2020

Chemical Engineering Science

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A novel capacitive device for the study of volumetric expansion of hydride powders

Cited by 12 publications

References 35 publications

Suitability Evaluation of LaNi5 as Hydrogen-Storage-Alloy Actuator by In-Situ Displacement Measurement during Hydrogen Pressure Change

Suitability Evaluation of LaNi5 as Hydrogen-Storage-Alloy Actuator by In-Situ Displacement Measurement during Hydrogen Pressure Change

Deformation mechanism of capsule-type hydrogen-storage-alloy actuator

Kinetics study on the nonlinear modified varying-size model of LaNi5 during hydrogenation/dehydrogenation

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