Publicação
Thermomagnetic energy conversion evaluation of Permalloy/Platinum multilayers on poly(vinylidene fluoride)-based flexible substrates
| Resumo: | This study reports on the thermomagnetic energy conversion efficiency of Ni<inf>81</inf>Fe<inf>19</inf>/Pt (Permalloy/Platinum – Py/Pt) multilayers deposited on flexible poly(vinylidene fluoride) (PVDF) based substrates. We examine the Anomalous Nernst and Longitudinal Spin-Seebeck Effects in these structures deposited on electroactive poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)), and poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)), comparing their performance to similar multilayers on Kapton substrates. Our research reveals that Py/Pt thin films on poled P(VDF-TrFE) and P(VDF-TrFE-CFE) substrates exhibit soft magnetic properties with minimal in-plane anisotropy. This characteristic could prove advantageous for applications requiring uniform and easily switchable magnetic properties. Furthermore, we found that P(VDF-TrFE-CFE) consistently produces higher voltage output (0.28 μV/K) across various temperature differences compared to other PVDF variants (≈ 0.23 μV/K) and Kapton substrates (0.19 μV/K), indicating superior thermomagnetic energy conversion performance. Our findings highlight the crucial role of substrate thermal properties and chemical composition in optimizing device performance under different operating conditions. The selection between P(VDF-TrFE) and P(VDF-TrFE-CFE) depends on specific application requirements, necessitating a balance between factors such as operating temperature range, flexibility, voltage output, and structural stability. This research contributes significantly to the development of advanced flexible thermoelectric materials for next-generation energy applications. It emphasizes the potential of these nanostructures for energy harvesting, wearable devices, and conformable sensors, paving the way for innovative solutions in the field of flexible electronics and energy conversion. |
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| Autores principais: | Ferreira, Armando José Barros |
| Outros Autores: | de Moraes, A.; Costa, Carlos Miguel Silva; Lopes, Cláudia Jesus Ribeiro; Neto, J. M.D.; Lanceros-Mendez, S.; Vaz, Filipe; Correa, M. A. |
| Assunto: | Anomalous Nernst effect (ANE) Energy-harvestingNernst voltage P(VDF-TrFE) P(VDF-TrFE-CFE) polymer Thermoelectric generation Ciências Naturais::Ciências Físicas |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | This study reports on the thermomagnetic energy conversion efficiency of Ni<inf>81</inf>Fe<inf>19</inf>/Pt (Permalloy/Platinum – Py/Pt) multilayers deposited on flexible poly(vinylidene fluoride) (PVDF) based substrates. We examine the Anomalous Nernst and Longitudinal Spin-Seebeck Effects in these structures deposited on electroactive poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)), and poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)), comparing their performance to similar multilayers on Kapton substrates. Our research reveals that Py/Pt thin films on poled P(VDF-TrFE) and P(VDF-TrFE-CFE) substrates exhibit soft magnetic properties with minimal in-plane anisotropy. This characteristic could prove advantageous for applications requiring uniform and easily switchable magnetic properties. Furthermore, we found that P(VDF-TrFE-CFE) consistently produces higher voltage output (0.28 μV/K) across various temperature differences compared to other PVDF variants (≈ 0.23 μV/K) and Kapton substrates (0.19 μV/K), indicating superior thermomagnetic energy conversion performance. Our findings highlight the crucial role of substrate thermal properties and chemical composition in optimizing device performance under different operating conditions. The selection between P(VDF-TrFE) and P(VDF-TrFE-CFE) depends on specific application requirements, necessitating a balance between factors such as operating temperature range, flexibility, voltage output, and structural stability. This research contributes significantly to the development of advanced flexible thermoelectric materials for next-generation energy applications. It emphasizes the potential of these nanostructures for energy harvesting, wearable devices, and conformable sensors, paving the way for innovative solutions in the field of flexible electronics and energy conversion. |
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