Batteries can be made of wood

A photo open source Tin coated batteries, can store a huge amount of energy and at the same time be environmentally friendly. In Maryland, with University support Maryland and the American National Science Foundation pass tests of such environmentally friendly energy storage devices in which along with wood and tin, it is also proposed to use sodium instead of more expensive lithium, which will reduce them cost price. But at home, to assemble such a device will not work: Wooden batteries are still very difficult to manufacture. IN some modern batteries use too fragile materials that are unable to withstand a huge amount of compression and extensions. The advantage of wood is that, being flexible, it withstands many electron release cycles in battery charging process. The developers claim that on At the current stage, such a battery can withstand up to 400 charges. Computer modeling has shown that this is due to ability of wood fibers to “wrinkle”, which is effective relieves stress from them. “Repeated passage of sodium ions through tin anodes can weaken the bond of the latter with time main material. And soft wood serves as a mechanical buffer, adapting to tin vibrations – this is the secret of our long-life sodium-ion batteries, ”said Professor Lee with Department of Engineering, University of Maryland. “On the invention of us the trees themselves came up with: their fibers contained rich water minerals, which means that wood can be stored in batteries and electrolyte – the main active substance “, – explains Liangbing Hu, assistant professor of materials science University of Maryland. Sodium does not accumulate so effectively energy like lithium, so they won’t use it, for example, in cell phones: batteries capable of storing a large amount of energy is supposed to be used on power plants using the energy of the sun.