The performance of supercapacitors used in hybrid electric vehicles has recently been improved by a novel hybrid composite electrode material created and synthesized by researchers at Dongguk University (HEVs). This composite electrode (CCS@GO) has unheard-of electrochemical properties and is made of cobalt selenide nanorods and copper selenide polyhedrons decorated over graphene oxide.
The unique morphology of the electrode material was used by the researchers to demonstrate an eco-friendly, affordable fabrication, improved charge storage and retention, and increased energy and power density.
Next-generation electronic devices and hybrid electric vehicles (HEVs) need excellent charge storage devices to function well. However, poor electrical conductivity and low energy density are major challenges in the use of supercapacitors, limiting their commercial applications.
As opposed to metal sulphides and oxides, which have slower electron-conducting rates, transition metal selenides have faster electron-conducting rates due to their inherent advantageous physicochemical properties, such as high chemical stability, a narrow bandgap, and low electronegativity.
“A fascinating method to tailor the characteristics of electrodes for electrochemical applications is the formation of composites from the combination of metal selenides and carbon templates. According to Hyun-Seok Kim from the Division of Electronics and Electrical Engineering at Dongguk University in Seoul, South Korea, who has been working on 2D materials and nano- and micro-electronics for energy and sensor devices, “we have designed and constructed a new hybrid composite electrode consisting of cobalt selenide nanorod-copper selenide polyhedron-decorated over graphene oxide (CCS@GO) based on this concept.
