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Aluminum oxide coating can protect the positive electrode of lithium-ion battery

wallpapers News 2020-03-18

Anulekha Haridas, a postdoctoral researcher at Rice University, reportedly used the constructed lithium-ion full cell to test the effect of the alumina coating on the positive electrode. Studies have shown that the nano-coating can protect the positive wire from degradation. They applied a thin layer of alumina to the common positive electrode. They found that it would make the electric car's battery perform better and have a more robust off-grid energy storage capacity


They tested the concept of a large-capacity porous silicon anode (instead of graphite) paired with a high-voltage nickel-manganese-cobalt oxide (NMC) cathode. The lithium-ion full battery has undergone hundreds of cycles, showing stable cyclability and 1000 mAh / g capacity. Through atomic layer deposition, a 3 nm alumina layer is coated on some positive electrodes. In the presence of hydrofluoric acid, the alumina coating can prevent the positive wire from decomposing, and alumina can also speed up the battery charging speed and reduce the number of charges and discharge cycles.

Therefore lithium is transported rapidly in alumina and may be captured in large quantities. This lithium capture mechanism can effectively protect the positive electrode and maintain a stable capacity and energy density for the full battery.

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