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In this communication, we use first-principles based multi-level computational methods to predict the crystal structure of Li4C6O6, the key intermediate material that can be oxidized to Li2C6O6 or reduced to Li6C6O6. This predicted structure leads to an X-ray diffraction (XRD) pattern in good agreement with experiment, validating the predicted structure. With this structure in hand one can proceed to determine details for the electrochemical properties of these organic electrodes (chemical potential for Li ion as a function of loading and the mechanism for the lithiation/delithiation process) useful in designing optimum systems.

The predicted crystal structure of Li4C6O6, an organic cathode material for Li-ion batteries, from first-principles multi-level computational methods