Para almacenar gran cantidad de energía. Los científicos se han inspirado en los árboles Y usan sodio en vez de litio. Taking inspiration from trees, scientists have developed a battery made from a sliver of wood coated with tin that shows promise for becoming a tiny, long-lasting, efficient and environmentally friendly energy source. The device is 1,000 times thinner than a sheet of paper."
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etiquetas: batería experimental , batería ecologica , energía 
