Improved high‐temperature energy storage density at low‐electric field in BOPP/PVDF multilayer films

• DOI: 10.1002/app.54729
• Publication Date: 2023-09-28T10:11:48Z
• Authors: Tiandong Zhang; Shuang Liang; Hainan Yu; Changhai Zhang; Chao Tang; Hua Li; Qingguo Chi
• Keywords: Polyvinylidene fluoride; Polypropylene; Dielectric loss

Abstract Biaxially oriented polypropylene (BOPP) is the most favorable commercial dielectric energy storage film due to its low loss and high electric breakdown strength. However, constant always leads relatively density. In this study, we propose an efficient strategy increase of BOPP films by laminating with polyvinylidene fluoride (PVDF). Utilizing PVDF optimizing thickness layers, high‐temperature density at low‐electric field significantly improved. When interlayer 5 μm total number stacked layers 7, BOPP/PVDF multilayer deliver excellent performance. The increases 3.54, 1.74 times higher than pure films. At a 200 kV/mm, discharged 1.02 0.99 J/cm 3 100 125°C. (BOPP ~0.50 0.48 @200 kV/mm). This work provides way improve constructing all‐organic structure.