Exfoliation of Graphite into Graphene in Aqueous Solutions of Inorganic Salts
Max Planck Institute for Polymer Research · Linköping University · +1 more institution
Abstract
Mass production of high-quality graphene sheets is essential for their practical application in electronics, optoelectronics, composite materials, and energy-storage devices. Here we report a prompt electrochemical exfoliation of graphene sheets into aqueous solutions of different inorganic salts ((NH4)2SO4, Na2SO4, K2SO4, etc.). Exfoliation in these electrolytes leads to graphene with a high yield (>85%, ≤3 layers), large lateral size (up to 44 μm), low oxidation degree (a C/O ratio of 17.2), and a remarkable hole mobility of 310 cm(2) V(-1) s(-1). Further, highly conductive graphene films (11 Ω sq(-1)) are readily fabricated on an A4-size paper by applying brush painting of a concentrated graphene ink (10 mg…
Citation impact
- FWCI
- 48.17
- Percentile
- 100%
- References
- 42
Authors
7Topics & keywords
- Graphene
- Exfoliation joint
- Graphite
- Supercapacitor
- Nanotechnology
- Aqueous solution
- Chemistry
- Electrochemistry