Superior electrochemical performance of sheet-stacked SnO2@ZrO2/C composite as anode material for lithium-ion batteries

Abstract

Abstract In this study, SnO2@ZrO2/C composite material was successfully prepared by a hydrothermal method and high-speed ball milling, which exhibited desirable cycle stability, reversible capacity, and strong rate performance. The synergistic effect between SnO2 and ZrO2 nanoparticles provided several lithium storage sites and accelerated the diffusion of ions and electrons. Graphite nanosheets were observed to effectively alleviate the volume expansion of the SnO2 and ZrO2 nanoparticles and prevent agglomeration, thereby maintaining the structural stability of the electrode. Based on the cycle performance, the SnO2@ZrO2/C nanocomposite exhibited a high reversible capacity of 688.6\xa0mA\xa0h\xa0g−1 at 0.2\xa0mA\xa0g−1 after 200 cycles. Moreover, it can be cycled 200 times with a capacity of 690.8\xa0mA\xa0h\xa0g−1 at 1.0\xa0mA\xa0g−1.