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Tuesday, October 09, 2007

Weaving Batteries into Clothes

Continued from page 1

By Kevin Bullis

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The machine can process materials besides polymers, which could be key to making functional fabrics. Metals with low melting points could be used to make conducting fibers. A wide array of inorganic materials that can be useful for batteries, fuel cells, and photovoltaics could be incorporated into the fibers by embedding them within polymers. The fibers, once formed into novel shapes, could also serve as templates for inorganic materials deposited using other techniques.

One of the more exotic possibilities is creating fibers from viruses that Belcher has genetically engineered to bind to and organize inorganic materials. She has already shown that the viruses can be used to make high-energy-density battery electrodes and fibers. The machine could combine battery electrodes with a polymer separator and electrolyte to form a complete battery. A similar approach could be used with photovoltaic materials. (Indeed, photovoltaic fibers made by other means have been demonstrated in the past.)

Among the cross-sectional patterns possible with the machine (and illustrated by the slide show accompanying this article) are some that look like sliced pies or concentric rings, and others that are much more complex. Once made, the fibers can be modified by dissolving certain polymers, leaving behind fibers with increased surface area. In one example, called "islands in the sea," a fiber thinner than a human hair is divided into dozens of nanoscale fibers. The machine can also produce fibers with cross sections that, instead of being circular, could have the shape of a cross or a three-lobed structure.

"Pretty much any cross section can be made," Fossey says. Indeed, what's lacking now is not the capabilities of the machine, he says, but enough researchers with ideas for how to use it.

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Comments

  • energetic uniforms
    djs on 10/09/2007 at 3:52 AM
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    3/5
    Packing lots of energy into soldiers'clothing may create flammability issues. Doing it in melt-processable fibers compounds the problem by creating molten hot "plastic" in case of a fire.
    Rate this comment: 12345
  • Batteries in battle clothes
    rttedrow on 10/09/2007 at 7:08 AM
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    4/5
    This going to make these soldiers stand out with proper detection gear?
    Rate this comment: 12345
  • This is brilliantly efficient.
    Monsterboy on 10/09/2007 at 11:35 AM
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    4/5
    I've been reading for years now about concerns over what to do with spent batteries. If we can weave them into clothes, it'll both take care of that problem and provide a cheap source of textiles. Excellent work.
    Rate this comment: 12345
  • bullets?
    garreau on 10/09/2007 at 12:15 PM
    Posts:
    1
    what happens when high energy density clothes are hit by bullets?  this is a request for information.
    Rate this comment: 12345
  • Risk factors of batteries into clothes.
    martinaatayo on 10/09/2007 at 2:20 PM
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    37
    Avg Rating:
    2/5
    Feedback from experimental sampling target tests
    on safety and associated risk in the context of
    human health and varying environmental impact
    on electrophoresized clothes might be more revealing in its vast application.
    Rate this comment: 12345
  • Recharge via static?
    bagsmode on 10/09/2007 at 11:25 PM
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    1/5
    It was stated that these batteries were rechargable, but unless I missed something, I didn't see a "how". Would be cool too see the "batteries" recharged on the go through static electricity generated via marching.

    "Get marching, maggots! Get a charge out of the Army!"
    Rate this comment: 12345
  • A thread of power
    cwbullis on 10/10/2007 at 8:42 AM
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    1
    This concept is fascinating.  Generating battery power in a uniform could save the services hundred of thousands of dollars.  I would be interested to know how the body would be insulated from the effects of the current being generated?; would there somehow be an on/off capability?; would the sun be used as a catalyst?; are there any long term health affects? Further research and testing may be the answer for now, but there is no doubt that continued funding for this innovation is warranted.
    Rate this comment: 12345
  • Electrocution
    gabrielg01 on 10/13/2007 at 12:32 PM
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    317
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    3/5
    And if something goes wrong, the soldiers will be electrocuted by their own clothing.
    Rate this comment: 12345
    • Re: Electrocution
      cretin001 on 10/14/2007 at 10:08 PM
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      35
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      2/5
      sounds like fun
      Rate this comment: 12345
    • Re: Electrocution
      patro7 on 10/22/2007 at 2:28 PM
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      3
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      1/5
      Electrocution huh?  How do you figure?  I think you guys are missing the point...the ability to integrate multiple materials into an extrudable fiber provides the opportunity for SEVERAL different applications (sensors, actuation, etc).  The power application is only valid if a favorable weight to power ratio can be exploited that provides what is already commercially available.  Could a novel form factor such as a fiber provide more distributed storage and utilization of power on the body?  Maybe.  But there are a lot of other really cool things that can be realized besides that.  
      Rate this comment: 12345
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