New battery charges in 6 minutes and lasts 5 times longer than the conventional one

Imagine that every time you fill up an electric car at a fast charger, the process slowly degrades the battery from the inside - as if the gas station pump damaged the tank with each use. The solution until today has been to either charge slowly, or accept faster degradation, and prepare to replace the battery sooner.

This dilemma - which makes many people still hesitant to exchange their combustion car for an electric vehicle - may have been resolved by researchers from Adelaide University, Australia, and Imperial College London. The team developed a battery capable of reaching 85% charge in just six minutes, while maintaining high energy density.

Recently published in the journal Nature Energy, the study shows that the new cell provided around 240.4 Wh/kg - which is the amount of energy the battery can store for every kilogram it weighs. In practice, this means that it can offer a long autonomy (hundreds of kilometers of range) without adding extra weight to the vehicle.

In other words: researchers have managed to create a material that withstands the stress of repeated rapid loading. The big difference is that the new battery can withstand the violence of this type of charging without suffering significant cracks or structural degradation.

Facing this classic problem of high-capacity batteries, the prototype retained 76% of its original capacity after 500 consecutive six-minute fast charge cycles. To give you an idea of the achievement: the current industry considers it a success when the battery maintains 80% of its health after hundreds of cycles, but only under slow and gentle charging.

How does a microscopic trick protect the battery from degradation?

A microscopic trick on the surface of the electrode acts as a shield, reducing parasitic reactions and stopping battery degradation - Magnific.com
The solution found by the researchers is not in the electrolyte - the liquid that conducts ions inside the battery -, but on the surface of the electrode. This distinction is important: changing the electrolyte usually solves one problem, but can create others.

To understand how the new cell survives high levels of stress, it is necessary to look at the microscopic engineering of the project. The team led by Professor Shi-Zhang Qiao, from Adelaide Uni, used a complex mechanism called interfacial anion reduction catalysis.

In a press release, Qiao himself explains the technology: "catalytic sites on the electrode surface attract anions to the battery interface and promote the formation of a robust inorganic protective layer, which is critical for fast charging and long-term stability."

The interface mentioned by the professor is the entry point where the battery liquid touches the solid electrode. When charging is fast, many ions try to pass through this port at once, "breaking" everything. For protection, the authors introduced catalytic modifications to the electrode surface - the region through which ions access the active material.

These changes work like magnets, pulling in negative particles (anions) floating in the electrolyte. When these ions reach the surface, they participate in the formation of an inorganic shield that works like an armored filter: it allows energy to enter during ultrafast charging, but prevents the internal structure from cracking or wearing out.

What's left for the new battery to hit the streets?

After good results in the laboratory, the battery now faces its "fire test": validation on an industrial scale - NEXV/Disclosure
The decisive validation of the new battery came in tests with cells in pouch format - the same "bags" used in real electric vehicle batteries, not in laboratory prototypes. Starting from scratch, the cell reached 88.6% charge in ten minutes and 83.6% in just six - both above the minimum standard required by the automotive industry.

Defined by USBAC (American Advanced Battery Consortium), this standard works as a kind of certificate of commercial viability: technologies that do not meet it are unlikely to reach automotive production lines. The new battery not only passes this benchmark, it passes it by a margin.

The next steps involve scaling and validating the technology under real-world conditions - steps that could take years. This will require proving that the material can be manufactured on a large scale at a competitive cost, integrating with systems already used by the automotive industry.

If viability is confirmed on an industrial scale, the impact goes beyond recharging time: a battery that is more resistant to fast charging preserves a component that represents up to 30% of the value of an electric vehicle - and eliminates one of the main obstacles highlighted by those who have not yet made the transition to electric mobility.

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Source: CNN