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Gadget battery charges in one minute

09.04.2015

Scientists from Stanford University have invented a high-performance battery that charges quickly, holds a charge for a long time and has a low cost. The researchers believe the development could replace many types of commercial lithium-ion and alkaline batteries.

The researchers did not report on the capacity of the developed battery, but said that their technology could be used in almost any device - from smartphones to electric cars and wind turbines. If such a battery is placed in a smartphone, it can be fully charged from the mains in one minute, the scientists reported. In modern phones, it takes several hours to charge the battery.

In the design of the new battery, the researchers used aluminum, a promising material for the industry of rechargeable power supplies, which allows to reduce costs, provide a higher charge density and have less flammability.

From aluminum, scientists at Stanford University made an anode - the positive pole of the battery. The cathode (negative pole) they made of graphite. A liquid electrolyte was placed in the battery, enclosed in a polymer bag.

"People have tried various cathode materials. We accidentally found that the best way to use a graphite cathode, which is mostly carbon. We found several types of graphite material with high performance," said Hongjie Dai, professor of chemistry at Stanford University. participating in the development.

Scientists managed to achieve a long service life of the experimental battery. It withstood over 7,5 thousand recharge cycles without loss of properties. Previous prototype aluminum batteries degraded after only 100 cycles, Dai said. In comparison, today's batteries last about a thousand cycles without significant loss of capacity.

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