Lithium-ion batteries (LIBs) with high energy density have attracted great attention for their wide applications in electric vehicles, and the exploration of the next-generation anode materials with high theoretical capacity is highly desired. In this work, SnO₂ nanoparticles with the particle size of 200 nm uniformly anchored on the surface of graphene oxide (GO) was prepared by combination of the ultrasonic method and the following calcination process. The SnO₂/GO composite with the weight ratio of SnO₂ to GO at 4:1 exhibits excellent electrochemical performance, which originates from the synergistic effects between GO and SnO₂ nanoparticles. A high discharge capacity of 492 mA·h·g⁻¹ can be obtained after 100 cycles at 0.2C, and after cycling at higher current densities of 1C and 2C, a discharge capacity of 641 mA·h·g⁻¹ can be restored when the current density goes back to 0.1C. The superior electrochemical performance and simple synthesis process make it a very promising candidate as anode materials for LIBs.

具有高能量密度的锂离子电池（LIB）在电动汽车中的广泛应用引起了人们的极大关注，因此人们迫切需要探索具有高理论容量的下一代负极材料。在这项工作中，通过超声方法和随后的煅烧过程的组合，制备了均匀地锚定在氧化石墨烯（GO）表面上的200 nm粒径的SnO ₂纳米颗粒。所述的SnO ₂ / GO复合具有SnO的重量比₂至GO在4：1个显示出优异的电化学性能，这从GO和SnO之间的协同效应源自_2个纳米颗粒。492 mA·h·g ^-1的高放电容量在0.2C下进行100次循环后，可以得到1μm的电流；在1C和2C的更高电流密度下进行循环后，当电流密度回到0.1C时，可以恢复641mA·h·g ^-1的放电容量。优异的电化学性能和简单的合成工艺使其成为锂离子电池正极材料的极有希望的候选者。