“Sand-based batteries could soon power your mobile phone”
“Researchers at the University of California, Riverside in the US have developed lithium-ion batteries that substitute graphite with silicon extracted from sand and last three times longer than current products.
The negative side of lithium-ion batteries, or anode, is made with graphite, and scientists have been trying to find a substitute material that could make batteries last longer. One of the options is silicon, which can store up to 10 times more energy than current materials, but it’s expensive and hard to produce in large quantities.
But then a very simple but brilliant option revealed itself to graduate student Zachary Favors. AsGizmag reports, Favors was relaxing after surfing when he noticed something quite special: sand. Sand is made of quartz, or silicon dioxide, and other materials, so Favors thought he could extract the silicon and use it to make batteries.
He went to back to the lab, milled the sand down and purified it to get silicon.”
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