Scientists have taken an important step toward building safer and faster batteries by solving a key problem that has slowed progress for years.
A research team led by Korea Advanced Institute of Science and Technology has developed a new way to make solid-state batteries more stable in air while also improving how quickly they can charge.
Solid-state batteries are often called the “dream battery” because they replace the flammable liquid inside today’s lithium-ion batteries with a solid material.
This makes them much less likely to catch fire and potentially more reliable for use in electric vehicles, robots, and even future flying transport systems.
However, these batteries have faced serious challenges, especially with the materials used inside them.
One promising group of materials is known as halide-based solid electrolytes.
These contain elements like chlorine or bromine and can allow lithium ions to move quickly, which is important for good battery performance.
But there is a major downside. These materials are very sensitive to moisture in the air, which can damage their structure and reduce their effectiveness. This makes them difficult to produce and handle outside of tightly controlled environments.
To overcome this issue, the KAIST team introduced a new design approach called “oxygen anchoring.” This method involves adding oxygen into the structure of the electrolyte in a stable way.
A key element in this process is tungsten, which helps hold the structure together more firmly. As a result, the material becomes much more resistant to air exposure and does not easily break down when it comes into contact with moisture.
At the same time, this new structure improves how well the battery works. Inside the electrolyte, lithium ions need to move freely in order to carry energy.
The oxygen anchoring design creates wider pathways, allowing these ions to travel more easily.
Tests showed that this new material had about 2.7 times higher ionic conductivity compared to similar materials used before. This means the battery can potentially charge faster and deliver energy more efficiently.
Another advantage of this discovery is its flexibility. The researchers found that the same design principle works with a variety of different materials, not just one specific type. They successfully applied it to electrolytes based on elements such as zirconium, indium, yttrium, and erbium, all with similar improvements.
This suggests that oxygen anchoring could become a general strategy for designing better solid-state batteries.
The findings, published in the journal Advanced Energy Materials, offer a new direction for battery research. By combining improved safety with better performance, this approach could help bring solid-state batteries closer to real-world use.
If developed further, this technology could play a major role in powering future devices and vehicles, offering a safer and more efficient alternative to current battery systems.
