Tuesday, April 7, 2015

Created battery for smartphones, which is charged for 1 minute

Scientists at Stanford University have created a portable battery which is charged in just one minute. New uses of aluminum-ion cells, which are cheaper than Li-Ion. They are non-flammable and does not explode, even if the user accidentally or intentionally hurt them.

Preexisting batteries based on aluminum could not provide a sufficiently high voltage, especially after repeated charging cycles. In developed at Stanford batteries use aluminum anode and a cathode made of graphite, which produces a voltage of about 2 volts, even after thousands of recharges.
Current patterns of batteries capable of withstanding 7500 charge cycles. For comparison, other prototypes aluminum-ion batteries can "survive" for only about 100 cycles. And for the majority of typical lithium-ion batteries, the figure is 1,000 cycles.
Materials used in the battery safer those used in lithium-ion batteries, as not subject to fire: the battery can be drilled, and even in this case it does not light up. Nevertheless, until a new battery can not supply voltage 3.7V and 4.2V, which is usually used in modern smartphones.But the researchers believe that this problem can be circumvented due to the improvement of the cathode material.
The prototype created by a group of researchers led by chemistry professor Dai Gonxha.The proposed battery is also flexible, which significantly expands the scope of its application.Project goal - to issue secure, inexpensive flexible battery charging with lightning speed and great lifecycle.