| Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2016) | |
| Energy Harvesting & Storage | Wednesday Sessions |
| Session EH-WeP |
| Session: | Energy Harvesting & Storage Poster Session |
| Presenter: | Kwang Bum Kim, Yonsei University, Korea, Republic of Korea |
| Correspondent: | Click to Email |
Graphene has been extensively stuided as an electrode material for supercapacitors due to its large specific surface area, high electrical conductivity and excellent chemical/mechanical stabiity. Due to the 2D nature, however, graphene tends to easily restack to form layered microstructures on a current collector during electrode fabrication. Restacking of the graphene sheets in an electrode greatly reduces the effective surface area of graphene and limits ion transport within a graphene electrode, which in turn leads to a decrease in the specific capacitance.
Here, we developled new approaches to improve capacitive properties of graphene: nanomesh graphene and activated graphene microsphere. The activated graphene microsphere is like an activated carbon-like graphene assembly which is prepared through graphene assembly into microspheres followed by an activation treatments.
In this study,we report on the activated carbon-like graphene assembly as high specific capacitance electrode materials for supercapacitor applications. Detailed synthetic procedure and electrochemical properties of the activated graphene microsphere assembly will be discussed in the meeting.