Dielectric and conduction mechanism studies of PVA-orthophosphoric acid polymer electrolyte
Polyvinyl alcohol (PVA)-based proton conducting polymer electrolytes have been prepared by the solution cast technique. The conductivity is observed to increase from 10(-9) to 10(-4) S cm(-1) as a result of orthophosphoric acid (H3PO4) addition. The plot of conductivity vs temperature shows that a p...
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| Format: | Article |
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Springer Verlag (Germany)
2007
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| author | Majid, Siti Rohana Arof, Abdul Kariem Kufian, M.Z. |
| author_facet | Majid, Siti Rohana Arof, Abdul Kariem Kufian, M.Z. |
| author_sort | Majid, Siti Rohana |
| collection | UM |
| description | Polyvinyl alcohol (PVA)-based proton conducting polymer electrolytes have been prepared by the solution cast technique. The conductivity is observed to increase from 10(-9) to 10(-4) S cm(-1) as a result of orthophosphoric acid (H3PO4) addition. The plot of conductivity vs temperature shows that a phase transition occurred at 343 K in the sample PVA-33 wt% H3PO4. The beta-relaxation peak is observed at 313 K. The glass transition temperature of PVA-33 wt% H3PO4 is 343 K. Orthophosphoric acid seems to play a dual role, i.e., as a proton source and as a plasticizer. The ac conductivity sigma(ac) = A omega(s) was also calculated in the temperature range from 303 to 353 K. The conduction mechanism was inferred by plotting the graph of s vs T from which the conduction mechanism for sample PVA-17 wt% H3PO4 was inferred to occur by way of the overlapping large polaron tunneling (OLPT) model and the conduction mechanism for the sample PVA-33 wt% H3PO4 b,y way ol thc correlated barrier height (CBH) model. |
| first_indexed | 2024-03-06T05:19:04Z |
| format | Article |
| id | um.eprints-7589 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:19:04Z |
| publishDate | 2007 |
| publisher | Springer Verlag (Germany) |
| record_format | dspace |
| spelling | um.eprints-75892019-08-27T01:30:17Z http://eprints.um.edu.my/7589/ Dielectric and conduction mechanism studies of PVA-orthophosphoric acid polymer electrolyte Majid, Siti Rohana Arof, Abdul Kariem Kufian, M.Z. QC Physics Polyvinyl alcohol (PVA)-based proton conducting polymer electrolytes have been prepared by the solution cast technique. The conductivity is observed to increase from 10(-9) to 10(-4) S cm(-1) as a result of orthophosphoric acid (H3PO4) addition. The plot of conductivity vs temperature shows that a phase transition occurred at 343 K in the sample PVA-33 wt% H3PO4. The beta-relaxation peak is observed at 313 K. The glass transition temperature of PVA-33 wt% H3PO4 is 343 K. Orthophosphoric acid seems to play a dual role, i.e., as a proton source and as a plasticizer. The ac conductivity sigma(ac) = A omega(s) was also calculated in the temperature range from 303 to 353 K. The conduction mechanism was inferred by plotting the graph of s vs T from which the conduction mechanism for sample PVA-17 wt% H3PO4 was inferred to occur by way of the overlapping large polaron tunneling (OLPT) model and the conduction mechanism for the sample PVA-33 wt% H3PO4 b,y way ol thc correlated barrier height (CBH) model. Springer Verlag (Germany) 2007 Article PeerReviewed Majid, Siti Rohana and Arof, Abdul Kariem and Kufian, M.Z. (2007) Dielectric and conduction mechanism studies of PVA-orthophosphoric acid polymer electrolyte. Ionics, 13 (4). pp. 231-234. ISSN 0947-7047, DOI https://doi.org/10.1007/s11581-007-0098-7 <https://doi.org/10.1007/s11581-007-0098-7>. https://doi.org/10.1007/s11581-007-0098-7 10.1007/s11581-007-0098-7 |
| spellingShingle | QC Physics Majid, Siti Rohana Arof, Abdul Kariem Kufian, M.Z. Dielectric and conduction mechanism studies of PVA-orthophosphoric acid polymer electrolyte |
| title | Dielectric and conduction mechanism studies of PVA-orthophosphoric acid polymer electrolyte |
| title_full | Dielectric and conduction mechanism studies of PVA-orthophosphoric acid polymer electrolyte |
| title_fullStr | Dielectric and conduction mechanism studies of PVA-orthophosphoric acid polymer electrolyte |
| title_full_unstemmed | Dielectric and conduction mechanism studies of PVA-orthophosphoric acid polymer electrolyte |
| title_short | Dielectric and conduction mechanism studies of PVA-orthophosphoric acid polymer electrolyte |
| title_sort | dielectric and conduction mechanism studies of pva orthophosphoric acid polymer electrolyte |
| topic | QC Physics |
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