Energy storage properties of all-organic polymers with hydrogen- bonded cross-links

Polyvinylidene fluoride (PVDF) has become the first choice for research due to its high polarization, high breakdown, and good processability. The amorphous polymer Polymethyl Methacrylate (PMMA) is interspersed in the PVDF molecular chain, which disrupts the orderly arrangement of the PVDF molecular chain, reduces the crystallinity of PVDF, and decreases the grain size. In addition, PMMA has low loss and high breakdown characteristics, which can further enhance the performance of composite materials. It was found that Glucose (GLC) is rich in hydroxyl groups and forms intermolecular hydrogen bonds with PVDF molecular chains, which reduces the size of polymer grains; the formation of a physically crosslinked network of hydrogen bonding can serve as a capture site for charge carriers and inhibit conduction loss. In this experiment, PMMA/GLC/PVDF all-organic composite films were prepared by casting method. Through the ternary composite synergy, the energy storage density of PMMA/GLC/PVDF all-organic composite film reaches a maximum value of 8.03 J/cm3, which is 1.5 times higher than that of 3 wt% GLC/PVDF composite, and 2 times higher than that of PVDF.