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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my-usm-ep.513912022-01-31T08:10:16Z Ternary Hybrid Pvdf-Hfp Pani Go Polymer Electrolyte Membrane For Lithium Ion Battery 2019-04-01 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 Thesis http://eprints.usm.my/51391/ http://eprints.usm.my/51391/1/Ternary%20Hybrid%20Pvdf-Hfp%20Pani%20Go%20Polymer%20Electrolyte%20Membrane%20For%20Lithium%20Ion%20Battery.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Kimia |
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USM Institutional Repository |
| language |
English |
| topic |
T Technology TP Chemical Technology |
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T Technology TP Chemical Technology Farooqui, Usaid Ur Rehman Ternary Hybrid Pvdf-Hfp Pani Go Polymer Electrolyte Membrane For Lithium Ion Battery |
| 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. |
| format |
Thesis |
| qualification_name |
Doctor of Philosophy (PhD.) |
| qualification_level |
Doctorate |
| author |
Farooqui, Usaid Ur Rehman |
| author_facet |
Farooqui, Usaid Ur Rehman |
| author_sort |
Farooqui, Usaid Ur Rehman |
| title |
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_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_sort |
ternary hybrid pvdf-hfp pani go polymer electrolyte membrane for lithium ion battery |
| granting_institution |
Universiti Sains Malaysia |
| granting_department |
Pusat Pengajian Kejuruteraan Kimia |
| publishDate |
2019 |
| url |
http://eprints.usm.my/51391/1/Ternary%20Hybrid%20Pvdf-Hfp%20Pani%20Go%20Polymer%20Electrolyte%20Membrane%20For%20Lithium%20Ion%20Battery.pdf |
| _version_ |
1747822069459976192 |