Researcher develops by chance nanowire batteries that survives 200,000 cycles

Apr

25

2016

A researcher accidentally discovered a method to dramatically extend the life of nanowire batteries. By gold nanowires in manganese dioxide and to coat Plexiglas-like gel, keep this in loading and unloading much better establish their own structure.

The University of California, Irvine, published their findings in ACS Energy Letters. The battery that researcher Mya Le Thai compiled by accident, survived 200,000 cycles of charge and discharge spread over three months with an average capacity loss of 5 percent. “Normally survive this kind of batteries up to 7000 cycles,” says one of the researchers. When comparing loses an ordinary lithium frequently for about 20 percent of its capacity at 500 cycles.

The layer of manganese dioxide causes the gold nanowire not oxidize. The theory of the investigators is that the layer of gel to the nanowires whole also gives some flexibility. This prevents cracking of the wires and the loss of capacity that occurs when the battery has gone through many cycles. The team is currently unsure why this works this way.

The researchers put the caveat that gold is an expensive material to use in a battery. Possibly also operates according to them, nickel as an alternative to the material. The team at Irvine has no actual battery still built on the basis of this construction. The test set-up is made up of two cathodes that recharge each other for the turn instead of a cathode and an anode. This was done in order to carry out the repetition of cycles easier. University will investigate the construction and will in future also real batteries it try to build.

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