Highly conductive phase change composites based on paraffin-infiltrated graphite panels for photo/electrothermal conversion and storage
<p dir="ltr">The extensive utilization of<u> phase change materials</u> (PCMs) for<u> thermal energy </u>harvesting, storage, and thermal management is often constrained by their inadequate thermal and <u>electrical conductivity</u>, form instabili...
محفوظ في:
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| مؤلفون آخرون: | , |
| منشور في: |
2023
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| الموضوعات: | |
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| الملخص: | <p dir="ltr">The extensive utilization of<u> phase change materials</u> (PCMs) for<u> thermal energy </u>harvesting, storage, and thermal management is often constrained by their inadequate thermal and <u>electrical conductivity</u>, form instability, and lack of photoabsorbance. To overcome these challenges, a phase change composite was prepared by vacuum infiltration of <u>paraffin wax</u> (PW) into a highly conductive scaffold of graphite panel (GP). Various PW grades with different <u>phase change temperatures </u>were tested to study their suitability for a wide range of applications. Graphite-based skeleton ensured high thermal and <u>electrical conductivity</u> and impeded liquid PW leakage in all composites. The composite thermal conductivity was enhanced up to 677 and 22 times that of PW in the axial and <u>radial directions</u>, respectively. The<u> latent heat capacity</u> of the composites varied between 88.5 and 102.7 J/g, depending on the PW grade. The composites are capable of harvesting thermal energy either by applying a small voltage of 1.8 V with a high electrothermal conversion efficiency of up to 71.1 % or by simulated sunlight with an excellent photothermal conversion efficiency of up to 76.5 %. The simple fabricating technique, a broad range of applications with different PW grades, and their efficient thermal properties meet the requirements for widespread utilization in thermal <u>energy harvesting</u>, storage, and thermal management of electronics, buildings, etc.</p><h2>Other Information</h2><p dir="ltr">Published in: Journal of Energy Storage<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.est.2023.107449" target="_blank">https://dx.doi.org/10.1016/j.est.2023.107449</a></p> |
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