High-performance lithium ion batteries face a major problem: Lithium will eventually start to run out as batteries are deployed in electric cars and stationary storage units. Researchers from Empa and ETH Zurich have now discovered an alternative: the “fool’s gold battery”. It consists of iron, sulfur, sodium and magnesium – all elements that are in plentiful supply. This means that giant storage batteries could be built on the cheap and used stationary in buildings or next to power plants, for instance.
There is an urgent need to search for low-priced batteries to store electricity. Intermittency of green electricity is affecting the power grids, calling for stationary storage units to be connected into a smart grid. Electric cars are of increasing popularity, but are still too expensive. Efficient lithium ion batteries we know are not suitable for large-scale stationary storage of electricity; they are just too expensive and precious lithium is too scarce. A cheap alternative is called for – a battery made of inexpensive ingredients that are highly abundant. But electrochemistry is a tricky business: Not everything that’s cheap can be used to make a battery.
Safe, durable and affordable
Maksym Kovalenko, Marc Walter and their colleagues at Empa’s Laboratory for Thin Films and Photovoltaics have now managed to pull off the unthinkable: by combining a magnesium anode with an electrolyte made of magnesium and sodium ions. Nanocrystals made of pyrite – more commonly known as fool’s gold – serve as the cathode. Pyrite is crystalline iron sulfide. The sodium ions from the electrolyte migrate to the cathode during discharging. When the battery is recharged, the pyrite re-releases the sodium ions. This so-called sodium-magnesium hybrid battery already works in the lab and has several advantages: The magnesium as the anode is far safer than highly flammable lithium. And the test battery in the lab already withstood 40 charging and discharging cycles without compromising its performance, calling for further optimization.
The biggest advantage, however, is the fact that all the ingredients for this kind of battery are easily affordable and in plentiful supply: Iron sulfide nanocrystals, for instance, can be produced by grinding dry metallic iron with sulfur in conventional ball-mills. Iron, magnesium, sodium, and sulfur hold 4th, 6th, 7th and 15th places by the abundance in the Earth’s crust(by mass). One kilogram of magnesium costs at most four Swiss francs, which makes it 15 times cheaper than lithium. There are also savings to be made when it comes to constructing the cheap batteries: Lithium ion batteries require relatively expensive copper foil to collect and conduct away the electricity. For the fool’s gold battery, however, inexpensive aluminum foil is perfectly sufficient.
Potential for storing the electricity produced annually at Leibstadt power station
The researchers primarily see potential in their development for large network storage batteries. The fool’s gold battery is not suitable for electric cars – its output is too low. But wherever it boils down to costs, safety and environmental friendliness, the technology is a plus. In their paper recently published in the journal Chemistry of Materials, the Empa researchers propose batteries with potential terawatt-hours-level storage. Such a battery might be used to temporarily store the annual production from the Swiss nuclear power station in Leibstadt, for instance. “The battery’s full potential has not been exhausted yet,” says Kovalenko, who teaches as a professor at ETH Zurich’s Department of Chemistry and Applied Biosciences alongside his research at Empa. “If we refine the electrolytes, we’re bound to be able to increase the electric voltage of the sodium-magnesium hybrid cell even further and to extend its cycling life.” He adds: “We also look for investors willing to support research into such post-Li-ion technologies and bring them to the market”.
Read more: Super environmentally friendly: the “fool’s gold battery”
The Latest on: Fool’s gold battery
[google_news title=”” keyword=”fool’s gold battery” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Fool’s gold battery
- The 30 best Walmart deals to shop this week — save up to 80% on Mother's Day gifts, gardening supplies and moreon April 26, 2024 at 2:23 pm
Some major deals on board: a Dyson stick vac for just $300, an HP laptop for $240 off and a powerful tower fan at a nearly 40%-plus markdown.
- 3 BRILLIANT MINUTES: Fool’s Gold and ocean sprayon April 24, 2024 at 8:35 pm
In this segment, Brad tells us how fool’s gold may not be so foolish anymore and what ocean spray may be contaminating the air with.
- "Fool’s Gold" May Turn Out to Be Goldenon April 21, 2024 at 2:00 pm
The most common mineral mistaken for gold is pyrite. With its brassy color and metallic luster, it’s often called Fool's Gold—a term that connotes a shiny but worthless commodity. But according to new ...
- More Than Just Fool’s Gold: Scientists Uncover Hidden Treasure in Pyriteon April 19, 2024 at 9:29 pm
There’s a reason airlines won’t let you put your laptop in your checked luggage; the lithium-ion battery poses a serious fire hazard. But why? Lithium is incredibly reactive. For instance, pure ...
- 2 Popular Artificial Intelligence (AI) Stocks to Sell Before They Drop 29% and 77%, According to Certain Wall Street Analystson April 19, 2024 at 1:15 am
Founded in 1993, The Motley Fool is a financial services company dedicated to making the world smarter, happier, and richer. The Motley Fool reaches millions of people every month through our premium ...
- We Used to Make Fun of Fool's Gold. Now, It Might Fuel Our Future.on April 18, 2024 at 5:00 am
Lithium is steadily becoming the most important element for the future, as its found in smartphones, laptops, electric cars, and is even central to future tech like nuclear fusion reactors.
- Scientists discover fool's gold may be more valuable than previously thought after extremely rare findon April 17, 2024 at 9:02 am
Now, thanks to some recent scientists ' findings, something we previously thought as not being valuable could be way more than meets the eye. The glittering golden hue of a cracked lump of pyrite has ...
- Fool's Gold Is About To Become Extremely Valuableon April 16, 2024 at 5:01 pm
We may call it fool's gold, but regardless it's about to become a lot more valuable. Here's what we know about it!
- Pyrite, also known as fool's gold, may contain valuable lithium, a key element for green energyon April 16, 2024 at 10:38 am
The technology revolution and development of new renewable energy resources is driving demand for lithium to new heights, but it is not a common mineral. Scientists say they have found lithium in an ...
- Fool’s Gold May Actually Be More Valuable Than We Realizedon April 16, 2024 at 2:36 am
Their study focused on 15 middle-Devonian sedimentary rock samples from the Appalachian basin in the United States. Analyses revealed that there was a surprising amount of lithium in pyrite minerals ...
via Bing News