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Russian scientists found the reason for inefficient charging lithium-ion batteries

Russian chemists under the guidance of Evgeny Antipov and Artem Abakumov from the Skolkovo Institute of Science and Technology have puzzled out the processes taking place on cathodes of lithium and sodium metal-ion batteries. The results of the study have been published in the Journal of the American Chemical Society.
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The researchers have managed to study processes on cathodes of batteries made of sodium which might replace lithium, with the latest becoming more expensive in last ten years. It has been turned out that inside the batteries with fluoro-phosphate of sodium and iron (Na2FePO4F), «semi-mobile» oxygen bound to sodium ions plays an important role. The oxygen lowers the mobility of ions and, consequently, decreases the efficiency of charging batteries.

Presumably, the mechanism unraveled by researchers might also be the case in other cathode materials of similar structure. Hence, this work will assist in understanding problems of functioning or a large class of metal-ion batteries.

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