But camera makers will still charge $80+ each for the batteries...

Discussion in 'Digital Photography' started by Rich, Dec 9, 2009.

  1. Rich

    Rich Guest

    Battery made of paper charges up

    Batteries made from plain copier paper could make for future energy
    storage that is truly paper thin.

    The approach relies on the use of carbon nanotubes - tiny cylinders of
    carbon - to collect electric charge.

    While small-scale nanotube batteries have been demonstrated before,
    the plain paper approach lends itself to making larger devices more
    cheaply.

    The work, published in Proceedings of the National Academy of
    Sciences, could lead to "paintable" energy storage.

    Because of its structure of millions of tiny, interconnected fibres,
    paper is a good candidate to hold on to carbon nanotubes, providing a
    scaffold on which to build devices.

    However, paper is also mechanically tough, and can be bent, curled or
    folded, more than the metal or plastic surfaces that are currently
    used or under development.

    Good on paper

    A team of researchers at Stanford University started with off-the-
    shelf copier paper, painting it with an "ink" made of carbon
    nanotubes.

    The coated paper is then dipped in lithium-containing solutions and an
    electrolyte to provide the chemical reaction that generates a
    battery's electric current.

    The paper acts to collect the electric charge from the reaction. Using
    paper in this way could reduce the weight of batteries, typically made
    with metal current collectors, by 20%.

    The team's batteries are also capable of releasing their stored energy
    quickly. That is a valuable characteristic for applications that need
    quick bursts of energy, such as electric vehicles - although the team
    has no immediate plans to develop vehicle batteries.

    Liangbing Hu, lead author on the research, said the most important
    aspect of the demonstration was that paper is an inexpensive and well-
    understood material - making wider usage of the technology more
    likely.

    "Standard copier paper used in our everyday life can be a solution in
    storing energy in a more efficient and cheap way," Dr Hu told BBC
    News.

    "The experienced technology developed in the paper industry over a
    century can be transferred to improve the process and performance of
    these paper-based devices."

    The team says that adaptations to the technique in the future could
    allow for simply painting the nanotube ink and active materials onto
    surfaces such as walls.

    They have even experimented with a number of textiles, paving the way
    for batteries made largely of cloth.
    Story from BBC NEWS:
     
    Rich, Dec 9, 2009
    #1
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  2. Batteries for DSLRs are an expensive rip-off with batteries for Sony DSLRs
    being the most expensive.
     
    Ray Shafranski, Dec 9, 2009
    #2
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