Bridged Carbon Fabric Membrane with Boosted Performance in AC Line Filtering Capacitors

High frequency responsive capacitors with lightweight, flexibility, and miniaturization are among the most vital circuit components because they can be readily incorporated into various portable devices to smooth out the ripples for circuits. Electrode materials no doubt are at the heart of such devices. Despite tremendous efforts and recent advances, the development of flexible and scalable high frequency responsive capacitor electrodes with superior performance remains a great challenge. Herein, a straightforward and technologically relevant method is reported to manufacture a carbon fabric membrane glued by nitrogen doped nanoporous carbons produced through a polyelectrolyte complexation induced phase separation strategy. The as obtained flexible carbon fabric bearing a unique hierarchical porous structure, and high conductivity as well as robust mechanical properties, serves as the free standing electrode materials of electrochemical capacitors. It delivers an ultrahigh specific areal capacitance of 2632 F cm amp; 8722;2 at 120 Hz with an excellent alternating current line filtering performance, fairly higher than the state of the art commercial ones. Together, this system offers the potential electrode material to be scaled up for AC line filtering capacitors at industrial level

Hydrazine Enabled One Step Synthesis of Metal Nanoparticle Functionalized Gradient Porous Poly ionic liquid Membranes

In this communication, a one step synthetic route is reported toward freestanding metal nanoparticle functionalized gradient porous polyelectrolyte membranes PPMs . The membranes are produced by soaking a glass platesupported blend film that consists of a hydrophobic poly ionic liquid PIL , poly acrylic acid , and a metal salt, into an aqueous hydrazine solution. Upon diffusion of water and hydrazine molecules into the blend film, a phase separation process of the hydrophobic PIL and an ionic crosslinking reaction via interpolyelectrolyte complexation occur side by side to form the PPM. Simultaneously, due to the reductive nature of hydrazine, the metal salt inside the polymer blend film is reduced in situ by hydrazine into metal nanoparticles that anchor onto the PPM. The as obtained hybrid porous membrane is proven functional in the catalytic reduction of p nitrophenol. This one step method to grow metal nanoparticles and gradient porous membranes can simplify future fabrication processes of multifunctional PPM