Ternary Hybrid Pvdf-Hfp Pani Go Polymer Electrolyte Membrane For Lithium Ion Battery
Poly(vinylidene fluoride-co-hexafluoropropylene) PVDF-HFP is a promising candidate as a separator in lithium-ion batteries owing to its outstanding chemical resistance, high mechanical and thermal stability with lower cost; however, its pristine form has limited characteristics that require furth...
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| Format: | Thesis |
| Language: | English |
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2019
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| Online Access: | http://eprints.usm.my/51391/1/Ternary%20Hybrid%20Pvdf-Hfp%20Pani%20Go%20Polymer%20Electrolyte%20Membrane%20For%20Lithium%20Ion%20Battery.pdf |
| _version_ | 1825906479870246912 |
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| author | Farooqui, Usaid Ur Rehman |
| author_facet | Farooqui, Usaid Ur Rehman |
| author_sort | Farooqui, Usaid Ur Rehman |
| collection | USM |
| description | Poly(vinylidene fluoride-co-hexafluoropropylene) PVDF-HFP is a promising
candidate as a separator in lithium-ion batteries owing to its outstanding chemical
resistance, high mechanical and thermal stability with lower cost; however, its pristine
form has limited characteristics that require further modification to achieve enhanced
performance. Therefore, in this research ternary hybrid PVDF-HFP/PANI/GO were
develop and the scope were divided into three phase which at first, different dosages
of polyaniline (PANI) (1 wt%, 2 wt%, and 3 wt%) are incorporated into PVDF-HFP
polymer matrix to fabricate PVDF-HFP/PANI polymer electrolyte membrane by using
breath-figure method. The PANI (2 wt%) inclusion influenced the ionic conductivity
and enhanced it from 1.98 × 10-4 S cm-1 of pristine PVDF-HFP membrane to 1.04 ×
10-3 S cm-1; however, its plasticizing effect resulted in tensile strength of pristine
PVDF-HFP membrane from 4.2 MPa to 2.8 MPa.
Secondly, the effect of graphene oxide (GO) is investigated by varying
different amount of GO (1 wt%, 2.5 wt%, and 5 wt%) into PVDF-HFP polymer matrix.
The GO (2.5 wt%) addition remarkably enhanced the tensile strength of PVDF-HFP
membrane from 4.2 MPa to 12.5 MPa; however, it showed negligible effect on ionic
conductivity of pristine PEM. Therefore, in third phase, PANI/GO composite material
is combined for the unique properties of both the fillers. The ternary hybrid PVDFHFP/
PANI (2 wt%)/GO (10 wt%, 25 wt%, and 40 wt%) PEMs are synthesized and
characterized for lithium ion batteries. The obtained PVDF-HFP/PANI/GO ternary membrane showed a remarkable
improvement in tensile strength up to 8.8 MPa. Furthermore, the PVDFHFP/
PANI/GO ternary membrane exhibited outstanding thermal stability with Td up
to 498°C, improved morphology, highest electrolyte uptake (367.5%) and an excellent
porosity of around 89%. Moreover, the obtained optimum pristine PVDF-HFP, PVDFHFP/
PANI, and PVDF-HFP/PANI/GO PEMs were considered for further
electrochemical characterization and modelling. Also, the R-CPE model provided a
best quality fit with MSE value of around 5% compared to R-C and R-L model.
Further, the prepared optimum PEMs is successfully applied in lithium ion battery and
showed good specific capacity for initial 10 cycles. However, PVDF-HFP/PANI/GO
ternary PEM resulted in better stability compared to other PEMs; therefore, it is tested
for capacity retention and it retained over 95% capacity after 30 cycles. In conclusion,
the proposed PVDF-HFP/PANI/GO ternary membrane is a potential candidate as a
separator in future lithium-ion batteries. |
| first_indexed | 2024-03-06T15:50:14Z |
| format | Thesis |
| id | usm.eprints-51391 |
| institution | Universiti Sains Malaysia |
| language | English |
| last_indexed | 2024-03-06T15:50:14Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | usm.eprints-513912022-01-31T08:10:16Z http://eprints.usm.my/51391/ Ternary Hybrid Pvdf-Hfp Pani Go Polymer Electrolyte Membrane For Lithium Ion Battery Farooqui, Usaid Ur Rehman T Technology TP Chemical Technology Poly(vinylidene fluoride-co-hexafluoropropylene) PVDF-HFP is a promising candidate as a separator in lithium-ion batteries owing to its outstanding chemical resistance, high mechanical and thermal stability with lower cost; however, its pristine form has limited characteristics that require further modification to achieve enhanced performance. Therefore, in this research ternary hybrid PVDF-HFP/PANI/GO were develop and the scope were divided into three phase which at first, different dosages of polyaniline (PANI) (1 wt%, 2 wt%, and 3 wt%) are incorporated into PVDF-HFP polymer matrix to fabricate PVDF-HFP/PANI polymer electrolyte membrane by using breath-figure method. The PANI (2 wt%) inclusion influenced the ionic conductivity and enhanced it from 1.98 × 10-4 S cm-1 of pristine PVDF-HFP membrane to 1.04 × 10-3 S cm-1; however, its plasticizing effect resulted in tensile strength of pristine PVDF-HFP membrane from 4.2 MPa to 2.8 MPa. Secondly, the effect of graphene oxide (GO) is investigated by varying different amount of GO (1 wt%, 2.5 wt%, and 5 wt%) into PVDF-HFP polymer matrix. The GO (2.5 wt%) addition remarkably enhanced the tensile strength of PVDF-HFP membrane from 4.2 MPa to 12.5 MPa; however, it showed negligible effect on ionic conductivity of pristine PEM. Therefore, in third phase, PANI/GO composite material is combined for the unique properties of both the fillers. The ternary hybrid PVDFHFP/ PANI (2 wt%)/GO (10 wt%, 25 wt%, and 40 wt%) PEMs are synthesized and characterized for lithium ion batteries. The obtained PVDF-HFP/PANI/GO ternary membrane showed a remarkable improvement in tensile strength up to 8.8 MPa. Furthermore, the PVDFHFP/ PANI/GO ternary membrane exhibited outstanding thermal stability with Td up to 498°C, improved morphology, highest electrolyte uptake (367.5%) and an excellent porosity of around 89%. Moreover, the obtained optimum pristine PVDF-HFP, PVDFHFP/ PANI, and PVDF-HFP/PANI/GO PEMs were considered for further electrochemical characterization and modelling. Also, the R-CPE model provided a best quality fit with MSE value of around 5% compared to R-C and R-L model. Further, the prepared optimum PEMs is successfully applied in lithium ion battery and showed good specific capacity for initial 10 cycles. However, PVDF-HFP/PANI/GO ternary PEM resulted in better stability compared to other PEMs; therefore, it is tested for capacity retention and it retained over 95% capacity after 30 cycles. In conclusion, the proposed PVDF-HFP/PANI/GO ternary membrane is a potential candidate as a separator in future lithium-ion batteries. 2019-04-01 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/51391/1/Ternary%20Hybrid%20Pvdf-Hfp%20Pani%20Go%20Polymer%20Electrolyte%20Membrane%20For%20Lithium%20Ion%20Battery.pdf Farooqui, Usaid Ur Rehman (2019) Ternary Hybrid Pvdf-Hfp Pani Go Polymer Electrolyte Membrane For Lithium Ion Battery. PhD thesis, Universiti Sains Malaysia. |
| spellingShingle | T Technology TP Chemical Technology Farooqui, Usaid Ur Rehman Ternary Hybrid Pvdf-Hfp Pani Go Polymer Electrolyte Membrane For Lithium Ion Battery |
| title | Ternary Hybrid Pvdf-Hfp Pani Go Polymer Electrolyte Membrane For Lithium Ion Battery |
| title_full | Ternary Hybrid Pvdf-Hfp Pani Go Polymer Electrolyte Membrane For Lithium Ion Battery |
| title_fullStr | Ternary Hybrid Pvdf-Hfp Pani Go Polymer Electrolyte Membrane For Lithium Ion Battery |
| title_full_unstemmed | Ternary Hybrid Pvdf-Hfp Pani Go Polymer Electrolyte Membrane For Lithium Ion Battery |
| title_short | Ternary Hybrid Pvdf-Hfp Pani Go Polymer Electrolyte Membrane For Lithium Ion Battery |
| title_sort | ternary hybrid pvdf hfp pani go polymer electrolyte membrane for lithium ion battery |
| topic | T Technology TP Chemical Technology |
| url | http://eprints.usm.my/51391/1/Ternary%20Hybrid%20Pvdf-Hfp%20Pani%20Go%20Polymer%20Electrolyte%20Membrane%20For%20Lithium%20Ion%20Battery.pdf |
| work_keys_str_mv | AT farooquiusaidurrehman ternaryhybridpvdfhfppanigopolymerelectrolytemembraneforlithiumionbattery |