Invited Speaker

Assoc. Prof. ChM. Dr. Yusran Sulaiman

Assoc. Prof. ChM. Dr. Yusran Sulaiman

Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Malaysia
Speech Title: Layer-By-Layer Assembled Ni-Co Layered Double Hydroxide on Polypyrrole/rGO for High Performance Supercapacitor

Abstract: A layer-by-layer (LBL) composite of polypyrrole/reduced graphene oxide|nickel-cobalt layered double hydroxides (PPy/rGO|Ni-Co LDHs) was prepared via chemical polymerization, hydrothermal and vacuum filtration. This conscientiously layered composition is free from any binder or surfactants which is highly favorable for supercapacitors. The PPy/rGO serves as an ideal backbone for Ni-Co LDHs to form a free-standing electrode for high-performance supercapacitor and enhanced the overall structural stability of the film. The well-designed layered nanostructures and high electrochemical activity from the hexagonal flakes like Ni-Co LDH provide large electroactive sites for the charge storage process. The PPy/rGO|Ni-Co LDHs unveiled outstanding supercapacitive performance with a maximum specific capacitance of 1018 F g-1 and specific energy of 46.5 Wh kg-1. The PPy/rGO|Ni-Co LDHs symmetrical electrode in the current study is the best reported for the two-electrode system for PPy- and LDHs- based composites.