1 research outputs found
Self-Assembled N/S Codoped Flexible Graphene Paper for High Performance Energy Storage and Oxygen Reduction Reaction
A novel flexible three-dimensional
(3D) architecture of nitrogen and sulfur codoped graphene has been
successfully synthesized via thermal treatment of a liquid crystalline
graphene oxide–doping agent composition, followed by a soft
self-assembly approach. The high temperature process turns the layer-by-layer
assembly into a high surface area macro- and nanoporous free-standing
material with different atomic configurations of graphene. The interconnected
3D network exhibits excellent charge capacitive performance of 305
F g<sup>–1</sup> (at 100 mV s<sup>–1</sup>), an unprecedented
volumetric capacitance of 188 F cm<sup>–3</sup> (at 1 A g<sup>–1</sup>), and outstanding energy density of 28.44 Wh kg<sup>–1</sup> as well as cycle life of 10 000 cycles as
a free-standing electrode for an aqueous electrolyte, symmetric supercapacitor
device. Moreover, the resulting nitrogen/sulfur doped graphene architecture
shows good electrocatalytic performance, long durability, and high
selectivity when they are used as metal-free catalyst for the oxygen
reduction reaction. This study demonstrates an efficient approach
for the development of multifunctional as well as flexible 3D architectures
for a series of heteroatom-doped graphene frameworks for modern energy
storage as well as energy source applications