Graphene synthesized on porous silicon for active electrode material of supercapacitors

16th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Su, B.B.^1 ; Chen, X.Y.^1 ; Halvorsen, E.^1

Department of Micro- and Nanosystem Technology, University College of Southeast Norway, Campus Vestfold, Raveien 215, Borre

3184, Norway^1

关键词: Active electrode materials;    Catalyst layers;    Chemical vapour deposition;    Graphene growth;    Micro-four-point probes;    Porous nanostructures;    Silicon samples;    Specific capacitance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/773/1/012057/pdf
DOI  :  10.1088/1742-6596/773/1/012057

来源: IOP

【 摘 要 】

We present graphene synthesized by chemical vapour deposition under atmospheric pressure on both porous nanostructures and flat wafers as electrode scaffolds for supercapacitors. A 3nm thin gold layer was deposited on samples of both porous and flat silicon for exploring the catalytic influence during graphene synthesis. Micro-four-point probe resistivity measurements revealed that the resistivity of porous silicon samples was nearly 53 times smaller than of the flat silicon ones when all the samples were covered by a thin gold layer after the graphene growth. From cyclic voltammetry, the average specific capacitance of porous silicon coated with gold was estimated to 267 μF/cm2while that without catalyst layer was 145μF/cm2. We demonstrated that porous silicon based on nanorods can play an important role in graphene synthesis and enable silicon as promising electrodes for supercapacitors.