08 February 2010
Composite could replace batteries in portable products
A composite material being developed by Imperial College as part of a three year €3.4million project could have application as a means of storing charge in portable electronics products. Although being developed primarily for the automotive industry, the composite is believed to have potential in devices such as mobile 'phones and computers.
Project coordinator Dr Emile Greenhalgh, from Imperial's Department of Aeronautics, said: "We are really excited about the potential of this new technology. We think the car of the future could be drawing power from its roof, its bonnet or even the door, thanks to our new composite material. The future applications for this material don't stop there – you might have a mobile phone that is as thin as a credit card because it no longer needs a bulky battery, or a laptop that can draw energy from its casing so it can run for a longer time without recharging. We're at the first stage of this project and there is a long way to go, but we think our composite material shows real promise."
The composite material being developed is made of carbon fibres and a polymer resin. It is said to be able to store and discharge large amounts of energy much more quickly than conventional batteries. In addition, the material does not use chemical processes, making it quicker to recharge than conventional batteries. Recharging is said to cause little degradation in the composite material because it does not involve a chemical reaction.
For the future, the researchers are looking to improve the material's mechanical properties by growing carbon nanotubes on the surface of the carbon fibres.This would also increase the material's surface area and improve its capacity to store more energy.
Author
Graham Pitcher
Supporting Information
Websites
http://www.imperial.ac.uk
Companies
Imperial College London
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