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Herein, a high-performance Si-based anode (Si@SnO 2 @C) has been obtained by semi-embedded integration of ultrafine SnO 2 nanoparticles onto the surface of cost-effective irregular Si particles and further coated with an ultrathin carbon through a simple route. The results verify that the in-situ conversion of SnO 2 into Li x Sn during lithiation process contributes to superb lithium storage performance of the Si particles, such as high capacity (1071.2 mAh g −1 after 500 cycles at 400 mA g −1 ) and long lifespan (1000 cycles). Finally, this study might be able to offer a viable strategy for facilely preparing Si-based anodes with advanced performance for lithium-ion batteries.
Li et al. (Mon,) studied this question.