Abstract
Bridging the performance gap between batteries and supercapacitors is an area of active research driven by the increased importance of effective solutions for energy storage. A promising trend in this area is the development of novel materials that afford design of architectures combining the advantages of both energy storage devices. Batteries, which operate based on Faradaic processes taking place in the bulk of the active electrode materials (chemical mechanism of storage), exhibit high energy, but suffer from slow charge and discharge rates. On the other hand, supercapacitors deliver high power at the cost of low energy storage by making use of surface ion adsorption (double-layer capacitance, physical mechanism of storage) and surface redox reactions (pseudo-capacitance). Carbon nanomaterials, including carbon nanotubes and graphene, are potential candidates for the preparation of electrodes operating at high current rates. This talk will discuss the performance of electrodes prepared from carbon nanomaterials and their specific benefits when assembled with nanostructured cathodes into full cells. The cells are characterized for energy density, power density, rate capability and cycling stability.
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