Coating of SnO2 -NiO nanoparticles with ultrathin graphite nanosheets as a high-performance anode material for lithium-ion batteries

Abstract

Abstract The lithium-ion battery anodes have always sought out the best possible properties with regards to large capacity, high rate, as well as long-term cycling stability. For this work, a straightforward hydrothermal and high-speed ball mill procedure was employed to create the SnO2-NiO-C anode material. Ion cycling and embedding are ideal for NiO nanoparticles with a unique hexagonal crystal structure, which can stabilize the structure and prevent SnO2 from becoming coarser. The graphite encapsulated in the outer layer can effectively prevent volume expansion during the cycle as well. According to the findings, the SnO2-NiO-C composite exhibits a significant reversible capacity of 1224.3 mAh g− 1 after 300 cycles at 0.2 A g− 1 and from the fourth cycle onwards, the Cullen efficiency remains above 97%. And it also possesses a long-term cycling stability of 820.1 mAh g− 1 after 1000 cycles at 1.0 A g− 1. Also, a significant rate property can reach 507.1 mAh g− 1 at 5.0 A g− 1. Therefore, the SnO2-NiO-C anode material for Li-ion batteries is promising on account of its excellent electrochemical performance.