Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effect
A transverse thermoelectric generator for magnetic-field-free and high-density power generation utilizing the anomalous Nernst effect is constructed and its performance is characterized. By alternately stacking two different permanent magnets with the large coercivity and anomalous Nernst coefficien...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2024-03-01
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| Series: | APL Energy |
| Online Access: | http://dx.doi.org/10.1063/5.0180506 |
| _version_ | 1797227659046944768 |
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| author | Fuyuki Ando Takamasa Hirai Ken-ichi Uchida |
| author_facet | Fuyuki Ando Takamasa Hirai Ken-ichi Uchida |
| author_sort | Fuyuki Ando |
| collection | DOAJ |
| description | A transverse thermoelectric generator for magnetic-field-free and high-density power generation utilizing the anomalous Nernst effect is constructed and its performance is characterized. By alternately stacking two different permanent magnets with the large coercivity and anomalous Nernst coefficients of opposite sign, transverse thermoelectric voltage and power can be generated in the absence of external magnetic fields and enhanced owing to a thermopile structure without useless electrode layers. In the permanent-magnet-based stack, the magnetic attractive force enables easy construction of the thermopile structure with a high fill factor. In this study, we construct a bulk module consisting of 12 pairs of SmCo5- and Nd2Fe14B-type permanent magnets having positive and negative anomalous Nernst coefficients, respectively, whose fill factor reaches ∼80%, whereas that of conventional thermoelectric modules based on the Seebeck effect is typically 30%–60%. We demonstrate magnetic-field-free anomalous Nernst power generation up to 177 µW at a temperature difference of 75 K around room temperature, which corresponds to the largest anomalous Nernst power density of 65 µW/cm2. The presented module structure concept will provide a design guideline for high-performance transverse thermoelectric power generation. |
| first_indexed | 2024-04-24T14:44:19Z |
| format | Article |
| id | doaj.art-deebd367bba6449f8765dcd7198f935f |
| institution | Directory Open Access Journal |
| issn | 2770-9000 |
| language | English |
| last_indexed | 2024-04-24T14:44:19Z |
| publishDate | 2024-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Energy |
| spelling | doaj.art-deebd367bba6449f8765dcd7198f935f2024-04-02T20:06:49ZengAIP Publishing LLCAPL Energy2770-90002024-03-0121016103016103-610.1063/5.0180506Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effectFuyuki Ando0Takamasa Hirai1Ken-ichi Uchida2National Institute for Materials Science, Tsukuba 305-0047, JapanNational Institute for Materials Science, Tsukuba 305-0047, JapanNational Institute for Materials Science, Tsukuba 305-0047, JapanA transverse thermoelectric generator for magnetic-field-free and high-density power generation utilizing the anomalous Nernst effect is constructed and its performance is characterized. By alternately stacking two different permanent magnets with the large coercivity and anomalous Nernst coefficients of opposite sign, transverse thermoelectric voltage and power can be generated in the absence of external magnetic fields and enhanced owing to a thermopile structure without useless electrode layers. In the permanent-magnet-based stack, the magnetic attractive force enables easy construction of the thermopile structure with a high fill factor. In this study, we construct a bulk module consisting of 12 pairs of SmCo5- and Nd2Fe14B-type permanent magnets having positive and negative anomalous Nernst coefficients, respectively, whose fill factor reaches ∼80%, whereas that of conventional thermoelectric modules based on the Seebeck effect is typically 30%–60%. We demonstrate magnetic-field-free anomalous Nernst power generation up to 177 µW at a temperature difference of 75 K around room temperature, which corresponds to the largest anomalous Nernst power density of 65 µW/cm2. The presented module structure concept will provide a design guideline for high-performance transverse thermoelectric power generation.http://dx.doi.org/10.1063/5.0180506 |
| spellingShingle | Fuyuki Ando Takamasa Hirai Ken-ichi Uchida Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effect APL Energy |
| title | Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effect |
| title_full | Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effect |
| title_fullStr | Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effect |
| title_full_unstemmed | Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effect |
| title_short | Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effect |
| title_sort | permanent magnet based transverse thermoelectric generator with high fill factor driven by anomalous nernst effect |
| url | http://dx.doi.org/10.1063/5.0180506 |
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