Abstract：The application of low-sulfur petroleum coke for the production of lithium-ion battery cathode materials is an essential way to increase its added value and save resources. In this work, artificial graphite was prepared from common petroleum coke by carbonization and graphitization, and its electrochemical properties were systematically compared with those of needle coke to explore its applicability as cathode materials for lithium-ion batteries. The results showed that the carbonized sample was difficult to be commercially applied due to the low first coulomb efficiency (73.41%) and low reversible capacity of 250 cycles [202.2 (mA·h)/g]. The coulomb efficiency of the low sulfur petroleum coke with first graphitization was 82.79%, which was higher than that of needle coke graphitization (79.83%). And the reversible capacity was 273.1 (mA·h)/g after 200 cycles, which was slightly lower than that of needle coke graphitization. The specific capacities of both were similar at 2C (744 mA/g), and the capacity retention ratio (99.4%) of the former was slightly higher than that of the latter (99.2%), which met the requirements for commercial battery use. The results indicate that the low sulfur petroleum coke after graphitization is of great potential for lithium-ion battery applications.
LU Jiaxin,YANG Lubin,WANG Jitong et al. Research on Electrochemical Performance of Cathode Materials for Low Sulfur Petroleum Coke Lithium-Ion Batteries[J]. Chemical Reaction Engineering and Technology, 2021, 37(5): 457-466.
