Enhanced Piezoelectric Energy Harvesting Performance of Flexible ...
Supporting Information
Enhanced Piezoelectric Energy Harvesting Performance of Flexible PVDF-TrFE Bilayer Films with Graphene Oxide Venkateswarlu Bhavanasi, Vipin Kumar, Kaushik Parida, Jiangxin Wang and Pooi See Lee* School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 *Corresponding author. Tel.:(65)-67906661. E-mail address: [email protected].
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1. Adhesion strength of graphene oxide on to PVDF-TrFE films:
Figure S1: Adhesion stress versus extension for bi-layer films The adhesion strength of the graphene oxide onto the PVDF-TrFE films are measured using pullout method (in tensile mode). Figure S1 shows the stress versus extension curves of the bilayer films of PVDF-TrFE and graphene oxide. The maximum stress value represents the adhesion strength of the graphene oxide onto the PVDF-TrFE film. In bi-layer films, graphene oxide fabricated on non-poled PVDF-TrFE layer exhibits an adhesion strength of 0.062 N/mm2 whereas graphene oxide fabricated on poled PVDF-TrFE films have an adhesion strength of 0.12 N/mm2. From the cycling measurements, it is observed that the bi-layers films are quite stable even after 1000 cycles upon application of a dynamic compression pressure of 0.32 MPa.
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2. Response time of the device:
Figure S2: Response time of the bi-layer film device
3. Energy harvesting performance of bi-layer films device:
Figure S3: Voltage output from the bi-layer energy havresting device by reversing the contacts
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4. Bi-layer energy harvesting device with 10 µm thick PVDF-TrFE film:
Figure S4: Voltage output from a) PVDF-TrFE film and b) bi-layer film
5. Bi-layer films with GO on flourine terminated PVDF-TrFE surface:
Figure S5: Voltage output from a) PVDF-TrFE film and b) bi-layer film
6. Current output from the PVDF-TrFE and bi-layer film devices:
Figure S6: Current output from a) PVDF-TrFE and b) Bi-layer films
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7. Dielectric constant:
Figure S7: Dielectric constant versus frequency for (a) PVDF-TrFE film, (b) Graphene oxide film
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Enhanced Piezoelectric Energy Harvesting Performance of Flexible PVDF-TrFE Bilayer Films with Graphene Oxide Venkateswarlu Bhavanasi, Vipin Kumar, Kaushik Parida, Jiangxin Wang and Pooi See Lee* School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 *Corresponding author. Tel.:(65)-67906661. E-mail address: [email protected].
S-1
1. Adhesion strength of graphene oxide on to PVDF-TrFE films:
Figure S1: Adhesion stress versus extension for bi-layer films The adhesion strength of the graphene oxide onto the PVDF-TrFE films are measured using pullout method (in tensile mode). Figure S1 shows the stress versus extension curves of the bilayer films of PVDF-TrFE and graphene oxide. The maximum stress value represents the adhesion strength of the graphene oxide onto the PVDF-TrFE film. In bi-layer films, graphene oxide fabricated on non-poled PVDF-TrFE layer exhibits an adhesion strength of 0.062 N/mm2 whereas graphene oxide fabricated on poled PVDF-TrFE films have an adhesion strength of 0.12 N/mm2. From the cycling measurements, it is observed that the bi-layers films are quite stable even after 1000 cycles upon application of a dynamic compression pressure of 0.32 MPa.
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2. Response time of the device:
Figure S2: Response time of the bi-layer film device
3. Energy harvesting performance of bi-layer films device:
Figure S3: Voltage output from the bi-layer energy havresting device by reversing the contacts
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4. Bi-layer energy harvesting device with 10 µm thick PVDF-TrFE film:
Figure S4: Voltage output from a) PVDF-TrFE film and b) bi-layer film
5. Bi-layer films with GO on flourine terminated PVDF-TrFE surface:
Figure S5: Voltage output from a) PVDF-TrFE film and b) bi-layer film
6. Current output from the PVDF-TrFE and bi-layer film devices:
Figure S6: Current output from a) PVDF-TrFE and b) Bi-layer films
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7. Dielectric constant:
Figure S7: Dielectric constant versus frequency for (a) PVDF-TrFE film, (b) Graphene oxide film
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