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Lightweight Battery made from Algae

October 15th, 2009 | No Comments | Posted in Batteries

Albert Mihranyan of Uppsala University in Sweden and his colleagues have built a battery that is lightweight and thin like paper. It is based on algal cellulose which fibres are wispier than common cellulose extracted from trees. This provides greater surface area and thus allows it to store more electric charge.

The algae is coated in a polymer called polypyrrole which, soaked into the cellulose, produced a combination that conducted electricity well. The anode and cathode of the battery were also fashioned from the stuff. For the electrolyte, filter paper soaked in brine was used.

More information from Uppsala University and the Economist.

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