凯发

Speaker-Han Lin

Han Lin
Swinburne University of Technology, Australia
Han has dedicated interest and several years of experience in the research on Optics, including optical system design and dynamic control of light-matter interaction in an ultrafast process, vectorial diffraction theory and super-resolution. Han has developed a principle to enhance the optical resolution and accelerate the processing speed of the laser microscopy, which leads to broad applications in all related research fields, such as laser nanofabrication, optical data storage and scanning laser imaging. 
Currently Han devoteshis research interests into the field of photo-reduction of graphene oxide materials using laser 3D printing technique and the applications in the energy storage devices, such as supercapacitors and batteries.
Title:High-performance graphene oxide thin-film supercapacitor fabricated by laser 3D printing
SymposiumB15 Supercapacitors
Starting Time
Ending Time
Abstract

Supercapacitors are promising energy storage devices due to their high power density and long cycle-life, which store the electrical energy at the electrode/electrolyte interface by means of reversible ion adsorption at high-surface-area porous carbon electrodes. Although supercapacitors have been significantly advanced by fabricating nanostructured materials, and developing thin-film manufacture technologies and device architectures, their energy densities are not comparable with those of lithium thin-film batteries. Compared to traditional supercapacitors based on the activated carbon material, the graphene supercapacitors show significantly advanced performance due to the larger surface area and higher ionic conductivity[1, 2]. On the other hand, the geometric design of the supercapacitors play a key role in determining the mean ionic path to decide the performance of the supercapacitors. It has been demonstrated that the interdigital supercapacitor design is advantageous over the traditional sandwich design due to the shortened mean ionic path[3]. In addition, the power and energy density increase as the width and the interspace of the electrodes decrease in the interdigital structure, which enlarge the lateral capacitance. Furthermore, the interdigital design can be ultrathin due to the removal of the additional separator layer. 
Here we demonstrate the fabrication ofthin-film planar interdigital supercapacitors by using a high-spatial-resolution laser 3D printing technique, in which the porous graphene electrodes are produced by laser photo-reduction of graphene oxide.In this way, the interspace and the width of the electrodes are accurately controlled by the laser patterning at nanometer scale precision to shorten the mean ionic path and boost the lateral capacitance. The scanning electron microscopic image of the thin-film supercapacitor is shown Fig. 1. Through tuning the dimension of the patterned electrodes, the performance of the supercapacitor can be optimized, leading to high capacitance of 16 mF/cm2 exceeding the state-of-the-art laser fabricated graphene supercapacitor[3]. 

Main Organizer

CGIA supports members to focus on application and industry chain, to keep pace with market development, to guarantee industry interests by involving in policy making and establishing standards, and to build long-term cooperation with up-down stream enterprises all over the world.

Contact
+86-18657108128
+86-10-62771936

E-mail: meeting@c-gia.org

Abstract: Minyang Lu

Sponsor: Wenyang Yang

Media: Liping Wang

Follow us on WeChat
Copyright © GRAPCHINA 京ICP备10026874号-24     京公网安备 11010802030754号
share to:

Operated by:China Innovation Alliance of the Graphene Industry