Ultrafine SnO2 anchored in ordered mesoporous carbon framework for lithium storage with high capacity and rate capability

Improving the reversible capacity and sluggish reaction kinetics of SnO2-based anodes have attracted considerable attention. Herein, an effective strategy by anchoring ultrafine (similar to 5 nm) and high content SnO2 nanoparticles (similar to 90%) in ordered mesoporous carbon framework (SnO2@OMC) is proposed to advance anode materials in lithium ion batteries. The ultrafine SnO2 and ordered mesoporous, which not only shorten the diffusion distance of Li+ and decrease the polarization, but also enhance the conversion reaction of SnO2 and interfacial storage of Li+. Benefiting from the novel strategy and elaborate design, the obtained SnO2@OMC anodes deliver a high reversible capacity (930 mAh g(-1) after 150 cycles at 0.2 A g(-1)) and excellent rate capabilities (321 mAh g(-1) at 5 A g(-1)). After assessment of the rate capability, SnO2@OMC anodes still display stable capacity.