A group of researchers at the US Stanford University has unveiled an aluminum battery that can replace alkaline batteries as well as lithium-ion batteries. It loads quickly, is flexible, inexpensive and can withstand thousands of charging cycles. Furthermore, it is safe.
– Our new battery does not even fire if you drill right through it, said Hongjie Dai, a chemistry professor at Stanford, said in a statement.
Aluminium is attractive for battery researchers because it is cheap and has good ability to store energy while is not combustible. The challenge has been to get aluminum batteries provide enough voltage and withstand many cycles of charging and discharging. But Stanford researchers discovered by chance that an anode of aluminum worked well together with a cathode of graphite. In an article in Nature describes their findings.
The prototype gave a voltage of 2 volts and managed more than 7500 cycles without lose capacity. It must also be loaded at any minute.
Though the technology has far to go to market. The next step for researchers is to increase the voltage and energy density.
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