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Fabrication of Graphene Supercapacitors for Flexible Energy Storage

2017; Materials Research Society of Korea; Volume: 27; Issue: 5 Linguagem: Inglês

10.3740/mrsk.2017.27.5.248

2287-7258

Majed Namdar Habashi, Shahab Khameneh Asl,

Advanced Sensor and Energy Harvesting Materials

In the present work, graphene powder was synthesized by laser scribing method. The resultant flexible light-scribed graphene is very appropriate for use in micro-supercapacitors. The effect of the laser scribing process in reducing graphene oxide (GO) was investigated. GO was synthesized using a chemical mixture of GO solution; then, it was coated onto a LightScribe DVD disk and laser scribed to reduce GO and create laser-scribed graphene (LSG). The CV curves of pristine rGO at various scan rates showed that the ultimate product possesses the ability to store energy at the supercapacitor level. Charge-discharge curves of pristine rGO at two different current densities indicated that the specific capacitance (Cm) increases due to the reduction of the discharge current density. Finally, the long-term charge-discharge stability of the LSG was plotted and indicates that the specific capacitance decreases very slightly from its primary capacitance of ~10F Cm−3 and that the cyclic stability is favorable over 1000 cycles.