Wednesday, 22 June 2016: 15:40
Grand Ballroom (Hyatt Regency)
Rechargeable lithium- and sodium-ion batteries have great potential as a new large-scale power source for electric vehicles (EVs) and energy storage system due to their high energy density, high voltage, and long cycle life. However, commercialization of these batteries for the automobile and energy storage industries requires further improvements in energy density and safety. Here, we report a novel cathode material with concentration gradient of Ni, Co, and Mn ions throughout each secondary particle where the nickel concentration decreases linearly whereas the manganese concentration increases linearly from the centre to the outer layer of each particle. Using this functional full-gradient approach, we are able to harness the high energy density of the nickel-rich core and the high thermal stability and long life of the manganese-rich outer layers.