High-performance SiO/C as anode materials for lithium-ion batteries using commercial SiO and glucose as raw materials

Silicon monoxide (SiO) is considered as a promising anode material for lithium-ion batteries (LIBs) due to its higher capacity and longer cycle life than those of graphite and silicon, respectively. In this study, glucose was developed as a suitable and inexpensive carbon source to synthesize SiO/C composite with a high performance. In addition, the effects of the calcination temperature and the amount of carbon source on the electrochemical performance of the SiO/C composite were investigated. The addition of 5 wt% glucose and a calcination temperature of 800 °C demonstrated the optimum conditions for SiO/C synthesis. The resultant SiO/C showed an initial charge capacity of 1259 mAh·g−1 and a high initial coulombic efficiency of 71.9%. A charge capacity of 850 mAh·g−1 after 100 cycles at 200 mA·g−1 was achieved, demonstrating the best value of the SiO/C-based materials. The composition changes of SiO under the calcination temperature played a significant role in the electrochemical performance. Overall, the obtained SiO/C material with a high capacity and good stability is suitable for LIB applications as an anode material.