There-dimensional porous carbon network encapsulated SnO2 quantum dots as anode materials for high-rate lithium ion batteries

摘要: Abstract SnO 2 quantum dots have attracted enormous interest, since they been shown to effectively minimize the volume change stress, improve anode kinetic and shorten lithium ion migration distance when used as materials for battery. In this work, we report a facile strategy fabricate nanostructure with homogenous anchored on three-dimensional (3D) nitrogen sulfur dual-doped porous carbon (NSGC@SnO ). Characterization results show that obtained an average critical size of 3–5 nm uniformly encapsulated in NSGC matrix. The as-designed can avoid aggregation well accommodate mechanical stress induced by thus maintain structure integrity electrode. As result, NSGC@SnO composite exhibits specific reversible capacity high 1118 mAh g −1 at current 200 mA g after 100 cycles along coulombic efficiency 98% excellent rate capability.