Increasing the Metal-Hydride Power Density Using Phase-Change Materials, Advanced Thermal Supports, and Expanded Graphite Nano-Particles.
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| Title: | Increasing the Metal-Hydride Power Density Using Phase-Change Materials, Advanced Thermal Supports, and Expanded Graphite Nano-Particles. |
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| Authors: | Maggini, Marco1 (AUTHOR), Facci, Andrea Luigi1,2 (AUTHOR) andrea.facci@unitus.it, Falcucci, Giacomo1,2 (AUTHOR), Ubertini, Stefano1,2 (AUTHOR) |
| Source: | Energies (19961073). Jan2026, Vol. 19 Issue 1, p185. 19p. |
| Subjects: | Power density, Hydrogen storage, Thermal interface materials, Phase change materials, Energy density, Graphite, Computer simulation, Hydrides |
| Abstract: | The large-scale integration of renewable energy systems requires hydrogen storage technologies that can decouple energy production from energy utilization and allow for seasonal storage. Metal hydrides can offer higher volumetric energy density and operational safety than compressed H2 but are limited by heat-transfer constraints that slow hydrogen absorption and desorption. This work investigates the performance of metal hydride–phase-change material hydrogen storage systems through advanced numerical modeling. Five reactor geometries are evaluated to quantify how longitudinal fins, transversal fins, helical fin structures, and graphite-enhanced composites influence heat removal, charge/discharge rates, and overall power density. Results show that longitudinal and transversal fins accelerate hydrogen absorption and desorption, reducing cycle times by up to 80.6%. The optimized finned helix configuration achieves the highest performance, with a power density of 2.55 kW/kg and charge/discharge powers of 6.75 kW and 13.25 kW, respectively. Expanded graphite further enhances kinetics in low-Biot-number designs, reducing cycle times by more than 30%. These findings provide design guidelines to maximize performance and efficiency of solid-state hydrogen storage for medium- and high-power applications. [ABSTRACT FROM AUTHOR] |
| Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 190785331 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Increasing the Metal-Hydride Power Density Using Phase-Change Materials, Advanced Thermal Supports, and Expanded Graphite Nano-Particles. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Maggini%2C+Marco%22">Maggini, Marco</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Facci%2C+Andrea+Luigi%22">Facci, Andrea Luigi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> andrea.facci@unitus.it</i><br /><searchLink fieldCode="AR" term="%22Falcucci%2C+Giacomo%22">Falcucci, Giacomo</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ubertini%2C+Stefano%22">Ubertini, Stefano</searchLink><relatesTo>1,2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Jan2026, Vol. 19 Issue 1, p185. 19p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Power+density%22">Power density</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+storage%22">Hydrogen storage</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+interface+materials%22">Thermal interface materials</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+change+materials%22">Phase change materials</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+density%22">Energy density</searchLink><br /><searchLink fieldCode="DE" term="%22Graphite%22">Graphite</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrides%22">Hydrides</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The large-scale integration of renewable energy systems requires hydrogen storage technologies that can decouple energy production from energy utilization and allow for seasonal storage. Metal hydrides can offer higher volumetric energy density and operational safety than compressed H2 but are limited by heat-transfer constraints that slow hydrogen absorption and desorption. This work investigates the performance of metal hydride–phase-change material hydrogen storage systems through advanced numerical modeling. Five reactor geometries are evaluated to quantify how longitudinal fins, transversal fins, helical fin structures, and graphite-enhanced composites influence heat removal, charge/discharge rates, and overall power density. Results show that longitudinal and transversal fins accelerate hydrogen absorption and desorption, reducing cycle times by up to 80.6%. The optimized finned helix configuration achieves the highest performance, with a power density of 2.55 kW/kg and charge/discharge powers of 6.75 kW and 13.25 kW, respectively. Expanded graphite further enhances kinetics in low-Biot-number designs, reducing cycle times by more than 30%. These findings provide design guidelines to maximize performance and efficiency of solid-state hydrogen storage for medium- and high-power applications. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/en19010185 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 19 StartPage: 185 Subjects: – SubjectFull: Power density Type: general – SubjectFull: Hydrogen storage Type: general – SubjectFull: Thermal interface materials Type: general – SubjectFull: Phase change materials Type: general – SubjectFull: Energy density Type: general – SubjectFull: Graphite Type: general – SubjectFull: Computer simulation Type: general – SubjectFull: Hydrides Type: general Titles: – TitleFull: Increasing the Metal-Hydride Power Density Using Phase-Change Materials, Advanced Thermal Supports, and Expanded Graphite Nano-Particles. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Maggini, Marco – PersonEntity: Name: NameFull: Facci, Andrea Luigi – PersonEntity: Name: NameFull: Falcucci, Giacomo – PersonEntity: Name: NameFull: Ubertini, Stefano IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 19 – Type: issue Value: 1 Titles: – TitleFull: Energies (19961073) Type: main |
| ResultId | 1 |
