Flexible nano-GFO/PVDF piezoelectric-polymer nano-composite films for mechanical energy harvesting

7th National Conference on Processing and Characterization of Materials

Mishra, Monali^1,3 ; Roy, Amritendu^2 ; Dash, Sukalyan^3 ; Mukherjee, Somdutta^1

Colloids and Materials Chemistry Department, CSIR, IMMT, Bhubaneswar

751013, India^1

School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology Bhubaneswar, Bhubaneswar

752050, India^2

Department of Chemistry, VSSUT Burla, Burla

768018, India^3

关键词: Ceramic/polymer composites;    High piezoelectric constant;    Micro-electronic devices;    Piezoelectric energy harvesters;    Piezoelectric polymers;    Polyvinylidene fluorides;    Renewable energy technologies;    Solvent casting method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/338/1/012026/pdf
DOI  :  10.1088/1757-899X/338/1/012026

来源: IOP

【 摘 要 】

Owing to the persistent quest of renewable energy technology, piezoelectric energy harvesters are gathering considerable research interest due to their potential in driving microelectronic devices with small power requirement. Electrical energy (milli to microwatt range) is generated from mechanical counterparts such as vibrations of machines, human motion, flowing water etc. based on the principles of piezoelectricity. Flexible high piezoelectric constant (d33) ceramic/polymer composites are crucial components for fabricating these energy harvesters. The polymer composites composed of gallium ferrite nanoparticles and polyvinylidene fluoride (PVDF) as the matrix have been synthesized by solvent casting method. First, 8 wt. % PVDF was dissolved in DMF and then different compositions of GaFeO3or GFO (10, 20, 30 wt. %) (with respect to PVDF only) nanocomposites were synthesized. The phase of the synthesized nanocomposites were studied by X- Ray diffraction which shows that with the increase in the GFO concentration, the intensity of diffraction peaks of PVDF steadily decreased and GFO peaks became increasingly sharp. As the concentration of GFO increases in the PVDF polymer matrix, band gap is also increased albeit to a small extent. The maximum measured output voltage and current during mechanical pressing and releasing conditions were found to be ∼ 3.5 volt and 4 nA, respectively in 30 wt % GFO-PVDF composite, comparable to the available literature.