Tokyo University of Science Develops Stable Sodium-Ion Batteries Using Copper Doping

Researchers at Tokyo University of Science have developed a method to enhance the stability and longevity of sodium-ion batteries by introducing copper doping into β-NaMnO₂ cathode materials. This advancement addresses the issue of stacking faults in β-NaMnO₂, which can lead to capacity loss during charge and discharge cycles. By incorporating copper, the researchers observed a significant reduction in stacking faults, resulting in improved cycling stability and performance of the batteries. This development holds promise for the future of sodium-ion batteries, offering a more sustainable and cost-effective alternative to traditional lithium-ion batteries.