All-solid-state supercapacitors on silicon using graphene from silicon carbide
Abstract
Carbon-based supercapacitors are lightweight devices with high energy storage performance, allowing for faster charge-discharge rates than batteries. Here, we present an example of all-solid-state supercapacitors on silicon for on-chip applications, paving the way towards energy supply systems embedded in miniaturized electronics with fast access and high safety of operation. We present a nickel-assisted graphitization method from epitaxial silicon carbide on a silicon substrate to demonstrate graphene as a binder-free electrode material for all-solid-state supercapacitors. We obtain graphene electrodes with a strongly enhanced surface area, assisted by the irregular intrusion of nickel into the carbide layer, delivering a typical double-layer capacitance behavior with a specific area capacitance of up to 174 μF cm−2 with about 88% capacitance retention over 10 000 cycles. The fabrication technique illustrated in this work provides a strategic approach to fabricate micro-scale energy storage devices compatible with silicon electronics and offering ultimate miniaturization capabilities.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 02, 2016
- Source ID
- 10.1063/1.4948768
Entities
People
- Barry Wood
- Bei Wang
- Francesca Iacopi
- Mohsin Ahmed
Organizations
- Air Force Office of Scientific Research
- Australian Research Council
- Griffith University
- University of Queensland