Energy draining in fuel cells.
Technology news: New technology allows making fuel cells 100 times cheaper

Fuel cells, similar to batteries, could power many things, from computers to cars. The problem is that producing them can be quite expensive because they contain platinum, a very expensive metal. In a paper published recently, a group of scientist from California describes a new method to build fuel cells. This technique replaces platinum with cobalt and porous carbon nanofibers, an innovation that decreases the costs by a factor of 100. The many potential applications of fuel cells are now much closer due to this cheaper way of fabrication.

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