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  • Construction of SnO2−Graphe...
    Zhu, Chengling; Chen, Zhixin; Zhu, Shenmin; Li, Yao; Pan, Hui; Meng, Xin; Imtiaz, Muhammad; Zhang, Di

    Scientific reports, 06/2017, Volume: 7, Issue: 1
    Journal Article

    Inspired by nature, herein we designed a novel construction of SnO 2 anodes with an extremely high lithium storage performance. By utilizing small sheets of graphene oxide, the partitioned-pomegranate-like structure was constructed (SnO 2 @C@half-rGO), in which the porous clusters of SnO 2 nanoparticles are partially supported by reduced graphene oxide sheets while the rest part is exposed (half-supported), like partitioned pomegranates. When served as anode for lithium-ion batteries, SnO 2 @C@half-rGO exhibited considerably high specific capacity (1034.5 mAh g −1 after 200 cycles at 100 mA g −1 ), superior rate performance and remarkable durability (370.3 mAh g −1 after 10000 cycles at 5 A g −1 ). When coupled with graphitized porous carbon cathode for lithium-ion hybrid capacitors, the fabricated devices delivered a high energy density of 257 Wh kg −1 at ∼200 W kg −1 and maintained 79 Wh kg −1 at a super-high power density of ∼20 kW kg −1 within a wide voltage window up to 4 V. This facile and scalable approach demonstrates a new architecture for graphene-based composite for practical use in energy storage with high performance.