Nasa invents ‘negative’ battery that could keep your phone charged for a WEEK

A NEW type of battery that you only need to charge once a week has been developed by scientists.

The power cell is made using fluoride rather than traditional lithium, allowing it to last up to eight times longer.


A new type of phone battery could make your phone last eight times longer[/caption]

It could be used to power the next generation of smartphones, or future Nasa spacecraft on their way to deep space.

Researchers at Caltech, Nasa’s JPL centre, Lawrence Berkeley National Lab and the Honda Research Institute developed the fluoride-based batteries.

The technology has been talked about for decades, but the new cell is the first time researchers have developed a rechargeable version.

This is because chemical properties of fluoride have typically made it difficult to work with.

The battery uses fluoride (pink) floating in liquid electrolyte

“Fluoride batteries can have a higher energy density, which means that they may last longer – up to eight times longer than batteries in use today,” said Caltech researcher Robert Grubbs.

“But fluoride can be challenging to work with, in particular because it’s so corrosive and reactive.”

Fluoride’s high energy density makes it difficult to stabilise at room temperature – it runs hot at 150 degrees Celcius or more.

To get around this, researchers added a new type of electrolyte liquid.

The new battery could help your phone last up to a week on a single charge

This was able to stabilise the battery, producing the world’s first rechargeable fluoride cell.

The team says the new design shows that fluoride is a viable battery, and could help make for batteries that last much longer.

“We are still in the early stages of development, but this is the first rechargeable fluoride battery that works at room temperature,” study author  Simon Jones.

“We’re unlocking a new way of making longer-lasting batteries. Fluoride is making a comeback.”

Fluoride-ion batteries work differently from the regular lithium-ion batteries.

They operate in a “negative” fashion, attracting electrons and drawing them through a conductor, instead of shedding them.

The research was published in the journal Science.

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