domingo, 25 de julio de 2010

Applied technology

Nanotecture’s combined expertise in electrochemistry and nanotechnology has given rise to a range of unique nanoporous materials with special electro-chemical properties. These have been successfully applied to the development of high-performance electrodes and supercapacitors.Of particular relevance to electrical energy storage is Nanotecture’s nanoporous nickel (II) hydroxide [Ni(OH)2] material. This is produced in a modified version of Nanotecture’s liquid crystal templating process, with the facility to modify and enhance the electrochemical behaviour of the underlying material to suit particular applications. Capable of discharging up to 50% of its charge in under 0.5 seconds compared with over 15 seconds for a non-porous equivalent, this nanoporous nickel (II) hydroxide lies at the heart of Nanotecture’s high-performance electrodes and supercapacitors.

High performance supercapacitorsNanotecture’s high-performance supercapacitor design marries the power and cycle-life benefits of a carbon-carbon supercapacitor (also known as an ultracapacitor) with the energy storage characteristics of a battery. The resulting device, known as an asymmetric hybrid supercapacitor, is capable of significantly outperforming standard supercapacitors in terms of both specific energy and specific power. This unique device - which owes its name to the asymmetric capacities of the two electrodes and the presence of two different charge-storage chemistries in the same design - combines Nanotecture’s high-performance nanoporous nickel (II) hydroxide electrode with a carbon counter-electrode. The former stores charge like a battery whilst the latter stores charge like an electrochemical capacitor.

The benefits of the nanoporous nickel (II) hydroxide electrode are twofold. The significantly greater surface area of the nanoporous material provides high energy storage capability whilst the very much shorter solid state diffusion paths greatly speed up the charging/discharging process. The result is a device capable of delivering more energy at higher powers and at faster rates than a standard electrochemical supercapacitor. Unlike other battery technologies, Nanotecture’s technology uses an electrolyte that is water-based, non-toxic and non-flammable. In addition the materials are not nanosized particles but micron-sized particles with nano-pores, making them easier and safer to handle.

Asignatura: EES

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