In this subsection, we aimed to measure the electrochemical performance of PGC electrodes. As a result, we mainly focused on the cycle reversibility, cycle stability, and charge and discharge capacity of PGC electrodes. ) that the CV curve of the first circle showed strong reduction peaks at 0.25 V and 0.8 V. These two reduction peaks were normally considered as being related to the generation of film SEI . It demonstrated that film SEI generated between anode and electrolyte in the first cycle. A more obvious reduction peak could be found at 1.5 V. It illustrated an alloying reaction which was the result of O reacted with Li + to form a Li-O alloy. In addition, the CV curves of the second and third cycles had a better coincidence. Therefore, PGC has favorable cycle reversibility after the first cycle. 2), demonstrated a platform in the discharge curve for the first cycle, corresponding to the irreversible reduction peak shown at the CV curve. The platform that appeared at the 1.2 V showed the lithiation process of phenolic, hydroxyl, amino, and other groups in PGC. With the increment of cycles, the platform became less obvious, implied that an irreversible reaction occurred during the first cycle . The phenomenon noted above demonstrated that PGC had extremely high cycle stability under high current capacity. The results illustrated that the PGC rate performance was better in the range of high voltage than low voltage.