Highly conductive phase change composites based on paraffin-infiltrated graphite panels for photo/electrothermal conversion and storage

• DOI: 10.1016/j.est.2023.107449
• Publication Date: 2023-04-26T18:16:07Z
• Authors: Safna Nishad; Peter Kasak; Igor Krupa
• Keywords: Paraffin wax; Phase-change material; Thermal energy

The extensive utilization of phase change materials (PCMs) for thermal energy harvesting, storage, and management is often constrained by their inadequate electrical conductivity, form instability, lack photoabsorbance. To overcome these challenges, a composite was prepared vacuum infiltration paraffin wax (PW) into highly conductive scaffold graphite panel (GP). Various PW grades with different temperatures were tested to study suitability wide range applications. Graphite-based skeleton ensured high conductivity impeded liquid leakage in all composites. enhanced up 677 22 times that the axial radial directions, respectively. latent heat capacity composites varied between 88.5 102.7 J/g, depending on grade. are capable harvesting either applying small voltage 1.8 V electrothermal conversion efficiency 71.1 % or simulated sunlight an excellent photothermal 76.5 %. simple fabricating technique, broad applications grades, efficient properties meet requirements widespread electronics, buildings, etc.