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Seaweed, The New Super Battery
knslyr
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10
8-3-2006 3:25 PM
525 views
tags:
technology
,
electronics
,
supercapacitors
,
science
,
battery
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/649133d7-593d-42af-bb5e-06feaa0fb247/344DFB8B-3289-4FF3-9177-047C47081EDA/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.nature.com/news/2006/060731/full/060731-3.html" href="http://www.nature.com/news/2006/060731/full/060731-3.html" style="font-size: 11px;">www.nature.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nature.com/news/2006/060731/full/060731-3.html"><H2 xmlns="">Baked seaweed and chips</H2></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nature.com/news/2006/060731/full/060731-3.html"><B>Better electronic capacitors could come from an unlikely source.</B></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nature.com/news/2006/060731/full/060731-3.html"><SPAN class="articletext" xmlns="">New materials for advanced electronics are usually expensive, high-tech substances. But a team of researchers in France has shown that energy-storage components called supercapacitors can be made from a remarkably cheap and humble material: baked seaweed.</SPAN></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nature.com/news/2006/060731/full/060731-3.html"><SPAN class="articletext" xmlns="">The French team cooked alginate in an air-free enclosure, turning it into a black powder. They then combined this with a polymer binder to make a hard material, which they shaped into electrodes for supercapacitors. </SPAN></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nature.com/news/2006/060731/full/060731-3.html"><SPAN class="articletext" xmlns="">The amount of electrical charge and energy that these devices can hold is comparable to that of capacitors made from commercial activated carbons. But the seaweed capacitors can be charged to voltages twice as high without breaking down, and the material is twice as dense. They hold up well over time, too: their charge-storage capacity declines by only 15% after 10,000 cycles of charging and discharging.</SPAN></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/344DFB8B-3289-4FF3-9177-047C47081EDA/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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