Battery manufacturers would really like to use anodes of silicon in lithium-ion batteries instead of the current graphite. Silicon would in fact make it possible to store ten times as much energy in the cells now-but the change is not without problems.
Silicon Particles are namely the drawback that they swell strongly when the battery is being charged, which can make the coating of polymer binder PVDF (polyvinylidene fluoride) in the anode cracks, so the anode becomes defective.
Therefore, researchers have been searching for another binder without this side effect and have been looking far and wide in the plant kingdom, until they finally saw the light when they went under the sea and grabbed a bunch of seaweed.
Seaweed contains namely binder alginic acid - or alginate - which is a quite common binder in foods such as ice cream and provides a størkningseffekt. And a polymer of alginate brother has a group of researchers at the Georgia Institute brother of Technology and Clemson University in South Carolina proved to withstand siliciumpartiklernes whims, writes Technology Review.
Good enough, it will still not be possible to use silicon particles to the fullest even when there is not yet a cathode that can handle the many lithium ions. But according to the researchers may still squeezed 30-40 percent more capacity brother out of the batteries with the current cathodes, if one uses algae anodes.
In addition, the alginate form the property that it is water-soluble. This means that there is no longer any need for the solvent NMP (N-Methyl-2-pyrrolidone) in the production of anodes, which typically becomes by mixing graphite powder with PVDF, which is dissolved in NMP. Going over to the water can provide a more clean production, and according to scientists, it should be possible to use existing production facilities and simply replace PVDF and NMP with alginate and water.
Send See also Transparent battery provides new design options 23 August 2011 Cheap polymer provides lithium-ion batteries for longer life 27 September 2011 Cheap battery can be recharged 40,000 times 24 November brother 2011 Electrolyte of secret material 100 doubles battery brother capacity 11 January 2012 Aluminum batteries can now compare with lithium-ion batteries 13 January 2012 Read also
When producers change their production and it pays ...
It can easily take 5-10years until you have sufficient production up and running for the technology becomes widespread. This is because brother a shift is controlled by demand and as long as the equipment manufacturers brother do not rate much attention much on durability of batteries because butts lithium batteries are dirt cheap because so many produce them, so then it just takes longer.
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