▎ 摘　　要

The importance of graphene as an additive in lithium-ion battery (LIB) composite cathodes has been broadly recognized; however, the graphenic structure can exhibit different structural and chemical properties reliant on the synthesis methods, thermal treatments, and postconditioning processes, ultimately influencing the performance of the electrodes. In the present work, with the aid of infrared spectroscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy, it was found that functionalized reduced graphene oxide (rGO) as conductive additive in a LiFePO4 cathode results in a capacity fade of only 6% after 50cycles, while unfunctionalized, highly defective rGO has a capacity fade of 52%. Furthermore, it was also found that the oxygen functional groups (OFGs) promote carbon-active material interactions, lessening the capacity fade after high C-rate perturbations, resulting in a recovery of 96% of the capacity after cycling at 0.1, 1, 5, 10, and finally 0.1C (each for 10cycles).