Flexible All-organic Composites with Ultrahigh Energy Storage Density for Wearable Electronics

In In this study, we present a novel approach to fabricating flexible energy storage ultracapacitors. While dielectric polymers have traditionally been employed in the production of energy storage capacitors, significant efforts over the past two decades have focused on improving their energy storage capabilities through the use of composite materials, primarily inorganic-polymer composites. In contrast, our work explores the use of all-organic composites, combining polymers with organic small molecules. These all-organic composites not only offer superior flexibility compared to conventional dielectric polymers, but they also exhibit enhanced energy storage performance. For example, the energy storage density of composites made from P(VDF-CTFE) or P(VDF-HFP) mixed with silane exceeds that of the pure polymer counterparts. These improvements make all-organic composites promising candidates for the development of flexible energy storage devices, particularly for applications in wearable electronics.