Thermally Resistive Electrospun Composite Membranes for Low-Grade Thermal Energy Harvesting
In this work, thermally insulating composite mats of poly(vinylidene fluoride) (PVDF) and polyacrylonitrile (PAN) blends are used as the separator membranes. The membranes improve the thermal-to-electrical energy conversion efficiency of a thermally driven electrochemical cell (i.e., thermocell) up...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Published: |
John Wiley & Sons
2018
|
| Subjects: |
| _version_ | 1796961534523473920 |
|---|---|
| author | Hasan, Syed Waqar Said, Suhana Mohd Sabri, Mohd Faizul Mohd Jaffery, Hasan Abbas Shuhaimi, Ahmad |
| author_facet | Hasan, Syed Waqar Said, Suhana Mohd Sabri, Mohd Faizul Mohd Jaffery, Hasan Abbas Shuhaimi, Ahmad |
| author_sort | Hasan, Syed Waqar |
| collection | UM |
| description | In this work, thermally insulating composite mats of poly(vinylidene fluoride) (PVDF) and polyacrylonitrile (PAN) blends are used as the separator membranes. The membranes improve the thermal-to-electrical energy conversion efficiency of a thermally driven electrochemical cell (i.e., thermocell) up to 95%. The justification of the improved performance is an intricate relationship between the porosity, electrolyte uptake, electrolyte uptake rate of the electrospun fibrous mat, and the actual temperature gradient at the electrode surface. When the porosity is too high (87%) in PAN membranes, the electrolyte uptake and electrolyte uptake rate are significantly high as 950% and 0.53 µL s−1, respectively. In such a case, the convective heat flow within the cell is high and the power density is limited to 32.7 mW m−2. When the porosity is lesser (up to 81%) in PVDF membranes, the electrolyte uptake and uptake rate are relatively low as 434% and 0.13 µL s−1, respectively. In this case, the convective flow shall be low, however, the maximum power density of 63.5 mW m−2 is obtained with PVDF/PAN composites as the aforementioned parameters are optimized. Furthermore, multilayered membrane structures are also investigated for which a bilayered architecture produces highest power density of 102.7 mW m−2. |
| first_indexed | 2024-03-06T05:55:32Z |
| format | Article |
| id | um.eprints-21931 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:55:32Z |
| publishDate | 2018 |
| publisher | John Wiley & Sons |
| record_format | dspace |
| spelling | um.eprints-219312019-08-08T08:49:52Z http://eprints.um.edu.my/21931/ Thermally Resistive Electrospun Composite Membranes for Low-Grade Thermal Energy Harvesting Hasan, Syed Waqar Said, Suhana Mohd Sabri, Mohd Faizul Mohd Jaffery, Hasan Abbas Shuhaimi, Ahmad QC Physics TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering In this work, thermally insulating composite mats of poly(vinylidene fluoride) (PVDF) and polyacrylonitrile (PAN) blends are used as the separator membranes. The membranes improve the thermal-to-electrical energy conversion efficiency of a thermally driven electrochemical cell (i.e., thermocell) up to 95%. The justification of the improved performance is an intricate relationship between the porosity, electrolyte uptake, electrolyte uptake rate of the electrospun fibrous mat, and the actual temperature gradient at the electrode surface. When the porosity is too high (87%) in PAN membranes, the electrolyte uptake and electrolyte uptake rate are significantly high as 950% and 0.53 µL s−1, respectively. In such a case, the convective heat flow within the cell is high and the power density is limited to 32.7 mW m−2. When the porosity is lesser (up to 81%) in PVDF membranes, the electrolyte uptake and uptake rate are relatively low as 434% and 0.13 µL s−1, respectively. In this case, the convective flow shall be low, however, the maximum power density of 63.5 mW m−2 is obtained with PVDF/PAN composites as the aforementioned parameters are optimized. Furthermore, multilayered membrane structures are also investigated for which a bilayered architecture produces highest power density of 102.7 mW m−2. John Wiley & Sons 2018 Article PeerReviewed Hasan, Syed Waqar and Said, Suhana Mohd and Sabri, Mohd Faizul Mohd and Jaffery, Hasan Abbas and Shuhaimi, Ahmad (2018) Thermally Resistive Electrospun Composite Membranes for Low-Grade Thermal Energy Harvesting. Macromolecular Materials and Engineering, 303 (3). p. 1700482. ISSN 1438-7492, DOI https://doi.org/10.1002/mame.201700482 <https://doi.org/10.1002/mame.201700482>. https://doi.org/10.1002/mame.201700482 doi:10.1002/mame.201700482 |
| spellingShingle | QC Physics TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering Hasan, Syed Waqar Said, Suhana Mohd Sabri, Mohd Faizul Mohd Jaffery, Hasan Abbas Shuhaimi, Ahmad Thermally Resistive Electrospun Composite Membranes for Low-Grade Thermal Energy Harvesting |
| title | Thermally Resistive Electrospun Composite Membranes for Low-Grade Thermal Energy Harvesting |
| title_full | Thermally Resistive Electrospun Composite Membranes for Low-Grade Thermal Energy Harvesting |
| title_fullStr | Thermally Resistive Electrospun Composite Membranes for Low-Grade Thermal Energy Harvesting |
| title_full_unstemmed | Thermally Resistive Electrospun Composite Membranes for Low-Grade Thermal Energy Harvesting |
| title_short | Thermally Resistive Electrospun Composite Membranes for Low-Grade Thermal Energy Harvesting |
| title_sort | thermally resistive electrospun composite membranes for low grade thermal energy harvesting |
| topic | QC Physics TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering |
| work_keys_str_mv | AT hasansyedwaqar thermallyresistiveelectrospuncompositemembranesforlowgradethermalenergyharvesting AT saidsuhanamohd thermallyresistiveelectrospuncompositemembranesforlowgradethermalenergyharvesting AT sabrimohdfaizulmohd thermallyresistiveelectrospuncompositemembranesforlowgradethermalenergyharvesting AT jafferyhasanabbas thermallyresistiveelectrospuncompositemembranesforlowgradethermalenergyharvesting AT shuhaimiahmad thermallyresistiveelectrospuncompositemembranesforlowgradethermalenergyharvesting |