Evolution of Battery

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Making batteries out of paper is increasingly attracting scientists. Here's the latest addition to the list: A researcher coated ordinary paper with a solution comprising carbon nanotubes and silver nanowires. The two components acted as the electrodes for a battery which could be charged 40,000 times. This is much more than what an efficient lithium battery can endure. Being made of paper, it is ultra-light and flexible. The battery stays intact even if the paper is crumpled or something spills on it accidentally. Plastic was considered as an option earlier but the nanotubes adheres better to paper. Proceedings of the National Academy of Sciences

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Down To Earth, January 2010