Understanding what happens at the atomic scale unlocks real-world improvement
For generations, the metals inside lithium-ion batteries—nickel, cobalt, iron—were believed to carry all the burden of energy storage, while oxygen stood idle. Researchers at the University of Dundee have now overturned that assumption, revealing through advanced modeling and experiment that oxygen actively participates in the charging process, particularly in layered oxide cathodes. Published in Nature Nanotechnology, the discovery reframes the atomic physics of batteries at a moment when reliable, long-lasting energy storage has become foundational infrastructure for modern civilization.
- Decades of battery science rested on a flawed premise—oxygen was passive—and that blind spot has quietly constrained every attempt to push battery performance further.
- The gap between what batteries can do and what electric vehicles and portable devices demand is growing urgent, as billions of people depend on storage technologies that degrade in ways engineers cannot fully explain.
- By comparing phosphate and layered oxide cathodes, researchers pinpointed exactly where and how oxygen extracts electrons during charging, giving the field a precise new lever to pull.
- The findings, now in Nature Nanotechnology, point toward batteries that charge faster, hold energy longer, and fail less—potentially reshaping the economics of EVs and consumer electronics alike.
For decades, battery science operated on a quiet assumption: the metals—nickel, cobalt, iron—did the real work, and oxygen was merely along for the ride. Researchers at the University of Dundee have now dismantled that assumption. Using advanced computer modeling alongside laboratory experiments, they found that oxygen actively participates in the charging and discharging process, extracting electrons in ways that fundamentally alter how battery performance should be understood.
The study examined two widely deployed cathode types—phosphates and layered oxides. Phosphate cathodes showed little oxygen involvement. Layered oxide cathodes told a different story: oxygen was doing substantial electrochemical work. That contrast is more than academic. It gives engineers a new atomic-level map of where batteries succeed and where they quietly fail.
Dr. Hrishit Banerjee framed the stakes directly: modern populations depend on advanced energy storage for nearly everything, and the electronic processes inside battery materials are no longer a matter of curiosity—they are essential knowledge. Understanding oxygen's role provides a foundation for designing batteries that last significantly longer, reducing both replacement cycles and environmental cost.
Published in Nature Nanotechnology, the findings now sit before the researchers and engineers who will carry them toward commercial application. The road from discovery to product is rarely straight, but the direction is clearer. As electric vehicles press against fossil fuel alternatives and portable devices deepen their hold on daily life, the promise of batteries that charge faster, endure longer, and operate more safely carries consequences that reach well beyond the laboratory.
For decades, scientists understood lithium-ion batteries as machines where the real work happened in the metals—nickel, cobalt, iron—while oxygen sat passively on the sidelines. That assumption has just shifted. Researchers working with advanced computer models and laboratory experiments have discovered that oxygen is not a bystander at all. It actively participates in the charging and discharging process, extracting electrons in ways that fundamentally change how we should think about battery performance.
The implications are substantial. If engineers can harness this newly understood role of oxygen, they could design batteries that charge faster, hold their charge longer, and operate more safely. The applications span everything from the phones in people's pockets to the electric vehicles increasingly filling roads worldwide. As renewable energy technologies become central to how societies function, the batteries that store that energy have become critical infrastructure—and understanding them at the atomic level is no longer academic curiosity.
Dr. Hrishit Banerjee, a theoretical physicist at the University of Dundee's faculty of science, engineering and business, framed the stakes plainly. Populations now depend on advanced energy storage systems for nearly everything. That dependence makes understanding the electronic processes happening inside battery materials not just useful but essential. This research, he said, provides a fundamental new understanding of how batteries actually work—knowledge that has been missing from the field's toolkit.
The study compared two major types of lithium-ion battery cathodes currently in use: phosphates and layered oxides. Both are deployed widely across consumer electronics and transportation. The researchers found a striking difference between them. Phosphate cathodes showed minimal participation from oxygen in the charging process. Layered oxide cathodes, by contrast, showed significant electron extraction from oxygen—evidence that oxygen was doing substantial work.
That distinction matters because it opens a path forward. By understanding what happens at the atomic scale inside batteries, engineers can begin to address a fundamental problem: current battery technologies fail and degrade over time in ways that remain poorly understood. The underlying physics of that degradation has constrained how much engineers can improve battery lifetimes. This new framework for understanding oxygen's role provides a foundation for designing batteries that last significantly longer, reducing the cycle of replacement and the environmental cost that comes with it.
The findings have been published in Nature Nanotechnology, placing them in front of the researchers and engineers who will translate this knowledge into the next generation of battery designs. The path from laboratory discovery to commercial product is never direct, but the direction is now clearer. As electric vehicles compete with fossil fuel alternatives and portable devices become ever more central to daily life, the ability to make batteries charge faster, last longer, and operate more safely could reshape the economics and practicality of technologies that billions of people depend on.
Citas Notables
By improving our knowledge of what is occurring at a tiny, atomic level within batteries, we can make big leaps in improving their performance in the real world.— Dr. Hrishit Banerjee, theoretical physicist at University of Dundee
La Conversación del Hearth Otra perspectiva de la historia
So oxygen was just sitting there the whole time, and nobody really understood what it was doing?
Essentially, yes. The assumption was that the metals in the battery did the heavy lifting during charging, and oxygen was just part of the structure. But when they modeled it carefully and ran experiments, they found oxygen was actively moving electrons around—especially in certain types of cathodes.
Why does it matter that oxygen is active rather than passive?
Because if you understand what oxygen is actually doing, you can design around it. You can optimize for it. Right now, batteries degrade and fail in ways engineers don't fully understand. If you know oxygen's role, you have a better shot at making batteries that don't fail as quickly.
The study compared two types of cathodes. Why the difference between them?
The phosphate cathodes showed almost no oxygen participation. The layered oxides showed significant electron extraction from oxygen. So the structure of the cathode itself determines whether oxygen gets recruited into the process or stays inert.
Does this mean we'll see faster-charging phones next year?
Not next year. This is foundational knowledge. Engineers need to take this understanding and figure out how to actually build better batteries with it. But yes, eventually—faster charging, longer life, better safety. That's the direction.