Researchers Discover Method to Inhibit Lithium Battery Dendrite Growth
Researchers Discover Method to Inhibit Lithium Battery Dendrite Growth
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Researchers Discover Method to Inhibit Lithium Battery Dendrite Growth, Boosting Efficiency, Safety, and Lifespan.
Researchers from Queen Mary University of London, in collaboration with an international research team from the UK and the US, have conducted a groundbreaking study that identifies a method to prevent dendrite growth in electric vehicle (EV) batteries by optimizing the microstructure of the graphite anode.
This discovery promises to revolutionize the efficiency, safety, and longevity of EV batteries. The findings are set to be published on August 24th, in the journal “Nature Communications.”
Dendrites are a phenomenon that can occur in lithium-ion batteries during rapid charging.
When lithium ions accumulate on the surface of the battery’s negative electrode instead of being evenly distributed within it, they form a layer of metallic lithium that continues to grow, ultimately piercing the separator.
This damages the battery, shortens its lifespan, and can lead to short circuits, causing fires and explosions.
The researchers explains that by optimizing the microstructure of the graphite anode, lithium plating can be significantly reduced.
The graphite anode is composed of randomly distributed tiny particles, and fine-tuning the particle and electrode morphology to achieve uniform reaction activity and reduce localized lithium saturation is crucial in suppressing lithium plating and enhancing battery performance.
“Our research has found that the lithiation mechanisms of graphite particles vary under different conditions, depending on their surface morphology, size, shape, and orientation. This significantly influences the distribution of lithium and the propensity for dendrite formation,” says Dr. Lu. “With the help of a pioneering three-dimensional battery model, we can capture when and where lithium plating begins and the rate at which it grows. This is a major breakthrough that could have a significant impact on the future of electric vehicles.”
This study deepens our understanding of the physical processes involved in lithium redistribution within graphite particles during fast charging, providing new insights for developing advanced fast-charging protocols.
This knowledge can assist in achieving efficient charging processes while minimizing the risk of lithium plating.
In addition to speeding up charging times, the research also reveals that improving the microstructure of graphite electrodes can enhance the energy density of batteries. This means that electric vehicles can travel longer distances on a single charge.
These findings represent a significant breakthrough in the field of electric vehicle battery development. They have the potential to make electric vehicles more attractive to consumers by enabling faster charging, longer lifespan, and increased safety.
