Functionalized graphene foam as electrode for improved electrochemical storage |
| |
Authors: | A. Bello M. Fabiane D. Y. Momodu S. Khamlich J. K. Dangbegnon N. Manyala |
| |
Affiliation: | 1. Department of Physics, Institute of Applied Materials, SARChI Chair in Carbon Technology and Materials, University of Pretoria, Pretoria, 0028, South Africa
|
| |
Abstract: | We report on a non-covalent functionalization of graphene foam (GF) synthesized via chemical vapour deposition (CVD). The GF was treated with pyrene carboxylic acid (PCA) which acted as a source of oxygen and/or hydroxyl groups attached to the surface of the graphene foam for its electrochemical performance improvement. The modified graphene surface enabled a high pseudocapacitive effect on the GF. A specific capacitance of 133.3 F g?1, power density ~ 145.3 kW kg?1 and energy density ~ 4.7 W h kg?1 were achieved based on the functionalized foam in 6 M KOH aqueous electrolyte. The results suggest that non-covalent functionalization might be an effective approach to overcome the restacking problem associated with graphene electrodes and also signify the importance of surface functionalities in graphene-based electrode materials. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|