Depth-dependent valence stratification in a lithium-rich layered cathode

A team of scientists from the Beijing Synchrotron Radiation Facility at the Institute of High Energy Physics of the Chinese Academy of Sciences, the Stanford Synchrotron Radiation Light Source at SLAC and Brookhaven National Laboratory used synchrotron-based nano-resolution spectro-tomography to study a typical lithium-rich nickel-manganese-cobalt (LirNMC) material (i.e., Li1.2Ni0.13Mn0.54Co0.13O2) to visualize its multi-layer morphology and the chemical and spatial dependence of oxygen redox behavior.

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