The economy and you and I need better storage power sources. This is being pushed by such areas as individual electric transport, green energy, wearable electronics and much more. Like everything in high demand, promising batteries are the subject of speculation, which gives rise to numerous promises, among which it is difficult to find real pearls. So the French pulled up. Can they?
French supercapacitor and battery company Nawa Technologies for batteries, a new carbon nanotube electrode that allows manufacturers to create traction batteries with much better performance. The company promises to increase battery power by ten times, specific energy capacity up to three times, life cycle up to five times and reduce charging time to minutes instead of hours.
These claims lead to a revolution in the production of batteries. And this is all the more interesting because the developer promises to provide ready-made technology for the production of batteries according to his recipe in about 12 months.
So what do the French offer? And they propose to abandon the traditional technology for the production of battery electrodes (anodes and cathodes). Today, electrodes are made from a mixture of powders dissolved in water or special solvents. The mixture is applied to the foil and then dried. This technology is fraught with significant inhomogeneity of the composition of the working material of the electrodes and eventually leads to its degradation. Nawa proposes to abandon powders and solutions and grow carbon nanotubes on foil as a basis (sponge) for the active material (lithium).
The technology proposed by the company makes it possible to grow up to 2 billion carbon nanotubes on each cm100 of foil. Moreover, the Nawa technology makes it possible to grow strictly vertically oriented nanotubes (perpendicular to the base), which shortens the path of lithium ions from one electrode to another tenfold. This means that the electrode material is capable of pumping a much greater electric current power through itself, and the ordered structure of equally oriented nanotubes will save space inside and the weight of the entire battery, which will result in an increase in battery capacity.
Also, since electrodes account for up to 25% of the cost of modern batteries, Nawa's production promises to make them cheaper. The technology of future production is such that the tubes will be grown on foil one meter wide in a rolled (rolled) way. Interestingly, this technology was developed by the company for the production of a new generation of branded supercapacitors, but it also promises to find application in the production of lithium batteries.
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Source: 3dnews.ru