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Important discovery: New battery from seawater has less cost and 4 times more power than lithium  

2022-12-13 20:13:49Lifestyle SHKRUAR NGA REDAKSIA VOX
Important discovery: New battery from seawater has less cost and 4 times more
New battery from sea water

Electronics could soon be powered by an ultra-cheap sea salt battery. Researchers have built a new inexpensive battery with four times the energy storage capacity of lithium. Built from sodium sulphide, a type of molten salt that can be processed from seawater, the battery is low-cost and more environmentally friendly than existing options.

It could be a 'breakthrough' for renewable energy, according to lead researcher Dr. Shenlong Zhao, from the University of Sydney .

As the climate heats up, there is an urgent need to switch to renewable energy sources such as wind and solar. But renewables are not always as stable as other sources which means batteries are needed to store this electricity for later use.

Many batteries are built with rare earth metals such as lithium, graphite and cobalt. To achieve climate neutrality, the EU will require 18 times more lithium than it currently uses by 2030 and almost 60 times more by 2050.

European Commission President Ursula von der Leyen said in September that "lithium and rare earths will soon be more important than oil and gas." But these metals come at a cost. Lithium mining can result in water scarcity, loss of biodiversity, damage to ecosystem functions and land degradation.

When metal is produced using evaporation ponds, for example, it takes approximately 2.2 million liters to produce one metric ton.

This is where the sea salt battery can provide an alternative. Molten salt batteries are not a new concept. They have been around for 50 years, but have been an "inferior alternative" with a short energy life cycle. But this new battery is different. The scientists modified the electrodes to improve the reactivity of sulfur, a key element that determines storage capacity.

The resulting product showed "super-high capacity and extremely long life at room temperature," advise the University of Sydney researchers. Because sea salt is ubiquitous, it can provide a scalable alternative to lithium-ion batteries.

However, the real challenge remains in maintaining it during periods of overproduction. The researchers hope to improve the battery technology with the goal that it will later be ready to be sold on the market.


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