The inherent low volumetric performance of two-dimensional (2D) carbon materials hinders their practical usage in portable devices. Three-dimensional (3D) carbon materials derived from sustainable biomass have been widely investigated but also suffer from the moderate volumetric performance. In this work, using biomass (jujube) as carbon precursor, robust 3D porous carbon with a high particle density of 1.06 g cm-3 is synthesized through high-temperature carbonization and subsequent activation. In three-electrode system, the electrode exhibits an ultrahigh volumetric capacitance of 476 F cm-3 in 6 M KOH electrolyte, which is much higher than previously reported results. The symmetrical two-electrode supercapacitor delivers excellent rate capability (75% capacitance retention at 20 A g-1) as well as superior cycle stability (91% capacitance retention after 10,000 cycles) in 1 M H2SO4 electrolyte. Furthermore, an energy density as high as 13 Wh L-1 at a power density of 477 W L-1 is demonstrated in 1M Li2SO4 electrolyte. The high volumetric performance of our biomass-derived porous carbon meets the requirements of portable devices and the fabrication process can be scaled up easily to industrial levels
Xiaoguang Liu is a PhD candidate in Nanomaterials Physicochemistry Department at West Pomeranian University of Technology Szczecin (Poland) under the direction of Prof. Xuecheng Chen. His current research includes the synthesis of carbon nanomaterials and their applications in electrochemical energy storage devices.
Nanocomposites have become more and more important as the implementation of nanoparticles in polymer allows additional functions in common industrial parts. Especially in the fabrication of filaments or fibres nanomodification is important, as only very small fillers can be added to the very fine fibres (common fibre diameter is 20 µm, fine filaments are 1 µm). It is important that the particle dimension does not exceed the fibre diameter, otherwise fibre manufacturing becomes impossible. [1,2] On the poster the latest results of bicomponent fiber production and several electrically conductive matrixes are published and it displays several methods to manufacture semi-conductive polymer-based fibers. The core-sheath constructed fibers are made from an insolation core that is surrounded by a conductive outer shell. The production of such fibers in the lab and industrial scale is shown. Furthermore the manufacturing of CNT and graphen modifierd bicomponent fibers is shown as a first step to manufacture a supercapacitor
Merle Orth has completed her M.Sc. at RWTH Aachen University, Germany and performs her PhD studies at Institut für Textiltechnik of RWTH Aachen University, Germany. She develops new devices to improve the melt spinning process.