Improved Rectification and Osmotic Power in Polyelectrolyte-Filled Mesopores
Ample studies have shown the use of nanofluidics in the ionic diode and osmotic power generation, but similar ionic devices performed with large-sized mesopores are still poorly understood. In this study, we model and realize the mesoscale ionic diode and osmotic power generator, composed of an asym...
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| Format: | Article |
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MDPI AG
2020-10-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/11/10/949 |
| _version_ | 1797550348668239872 |
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| author | Ding-Cheng Zheng Li-Hsien Yeh |
| author_facet | Ding-Cheng Zheng Li-Hsien Yeh |
| author_sort | Ding-Cheng Zheng |
| collection | DOAJ |
| description | Ample studies have shown the use of nanofluidics in the ionic diode and osmotic power generation, but similar ionic devices performed with large-sized mesopores are still poorly understood. In this study, we model and realize the mesoscale ionic diode and osmotic power generator, composed of an asymmetric cone-shaped mesopore with its narrow opening filled with a polyelectrolyte (PE) layer with high space charges. We show that, only when the space charge density of a PE layer is sufficiently large (><inline-formula><math display="inline"><semantics><mrow><mn>1</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mn>6</mn></msup><msup><mrow><mrow><mtext> </mtext><mi mathvariant="normal">C</mi><mo>/</mo><mi mathvariant="normal">m</mi></mrow></mrow><mn>3</mn></msup></mrow></semantics></math></inline-formula>), the considered mesopore system is able to create an asymmetric ionic distributions in the pore and then rectify ionic current. As a result, the output osmotic power performance can be improved when the filled PE carries sufficiently high space charges. For example, the considered PE-filled mesopore system can show an amplification of the osmotic power of up to 35.1-fold, compared to the bare solid-state mesopore. The findings provide necessary information for the development of large-sized ionic diode and osmotic power harvesting device. |
| first_indexed | 2024-03-10T15:27:57Z |
| format | Article |
| id | doaj.art-d110684241e042fe9b895d062086071c |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T15:27:57Z |
| publishDate | 2020-10-01 |
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| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-d110684241e042fe9b895d062086071c2023-11-20T17:56:44ZengMDPI AGMicromachines2072-666X2020-10-01111094910.3390/mi11100949Improved Rectification and Osmotic Power in Polyelectrolyte-Filled MesoporesDing-Cheng Zheng0Li-Hsien Yeh1Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, TaiwanDepartment of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, TaiwanAmple studies have shown the use of nanofluidics in the ionic diode and osmotic power generation, but similar ionic devices performed with large-sized mesopores are still poorly understood. In this study, we model and realize the mesoscale ionic diode and osmotic power generator, composed of an asymmetric cone-shaped mesopore with its narrow opening filled with a polyelectrolyte (PE) layer with high space charges. We show that, only when the space charge density of a PE layer is sufficiently large (><inline-formula><math display="inline"><semantics><mrow><mn>1</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mn>6</mn></msup><msup><mrow><mrow><mtext> </mtext><mi mathvariant="normal">C</mi><mo>/</mo><mi mathvariant="normal">m</mi></mrow></mrow><mn>3</mn></msup></mrow></semantics></math></inline-formula>), the considered mesopore system is able to create an asymmetric ionic distributions in the pore and then rectify ionic current. As a result, the output osmotic power performance can be improved when the filled PE carries sufficiently high space charges. For example, the considered PE-filled mesopore system can show an amplification of the osmotic power of up to 35.1-fold, compared to the bare solid-state mesopore. The findings provide necessary information for the development of large-sized ionic diode and osmotic power harvesting device.https://www.mdpi.com/2072-666X/11/10/949mesoporemicro/nanofluidicsion current rectificationsalinity gradient power |
| spellingShingle | Ding-Cheng Zheng Li-Hsien Yeh Improved Rectification and Osmotic Power in Polyelectrolyte-Filled Mesopores Micromachines mesopore micro/nanofluidics ion current rectification salinity gradient power |
| title | Improved Rectification and Osmotic Power in Polyelectrolyte-Filled Mesopores |
| title_full | Improved Rectification and Osmotic Power in Polyelectrolyte-Filled Mesopores |
| title_fullStr | Improved Rectification and Osmotic Power in Polyelectrolyte-Filled Mesopores |
| title_full_unstemmed | Improved Rectification and Osmotic Power in Polyelectrolyte-Filled Mesopores |
| title_short | Improved Rectification and Osmotic Power in Polyelectrolyte-Filled Mesopores |
| title_sort | improved rectification and osmotic power in polyelectrolyte filled mesopores |
| topic | mesopore micro/nanofluidics ion current rectification salinity gradient power |
| url | https://www.mdpi.com/2072-666X/11/10/949 |
| work_keys_str_mv | AT dingchengzheng improvedrectificationandosmoticpowerinpolyelectrolytefilledmesopores AT lihsienyeh improvedrectificationandosmoticpowerinpolyelectrolytefilledmesopores |