Graphene-Based Nanostructures for Electrochemical Energy Storage

posted Jun 14, 2013, 8:47 AM by Timothy Fisher   [ updated Jun 18, 2013, 10:29 AM by Guoping Xiong ]

Student: Guoping Xiong

Faculty: Tim Fisher, Ron Reifenberger

Sponsor: AFOSR MURI on ‘Nanofabrication of Tunable 3D Nanotube Architectures’

Summary: Small crystalline graphitic petals (GPs), or carbon nanowalls (or nanosheets) containing a few layers of graphene have interesting industrial applications because they grow roughly perpendicular to a substrate and dramatically increase the surface area from which they grow. The GPs are thin, containing only a few graphitic layers, and can be catalyst-free, suggesting they might be a source of free-standing graphitic material. This work involves growth of GPs on various substrates (e.g., buckypaper, carbon cloth, silicon, quartz) for conventional supercapacitor, on-chip planar micro-supercapacitor and lithium ion battery electrodes. The graphitic petals with high specific area and high electrical conductivity can also be used as templates for pseudocapacitive materials (e.g., metal oxide and conducting polymers) in electrochemical energy storage application. Interdigitated GP electrodes on insulating substrates are fabricated using conventional photolithography techniques for micro-supercapacitor application.  Boron and nitrogen (B, N) modified graphene-based materials are fabricated using a facile chemical method for lithium ion battery electrode application