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首页> 外文期刊>RSC Advances >Sonochemistry-enabled uniform coupling of SnO2 nanocrystals with graphene sheets as anode materials for lithium-ion batteries
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Sonochemistry-enabled uniform coupling of SnO2 nanocrystals with graphene sheets as anode materials for lithium-ion batteries

机译：声化学使SnO2纳米晶体与石墨烯片作为锂离子电池阳极材料的均匀偶联

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SnO _(2) /graphene nanocomposite was successfully synthesized by a facile sonochemical method from SnCl _(2) and graphene oxide (GO) precursors. In the sonochemical process, the Sn ~(2+) is firstly dispersed homogeneously on the GO surface, then in situ oxidized to SnO _(2) nanoparticles on both sides of the graphene nanosheets (RGO) obtained by the reduction of GO under continuous ultrasonication. Graphene not only provides a mechanical support to alleviate the volume changes of the SnO _(2) anode and prevent nanoparticle agglomeration, but also serves as a conductive network to facilitate charge transfer and Li ~(+) diffusion. When used as a lithium ion battery (LIB) anode, the SnO _(2) /graphene nanocomposite exhibits significantly improved specific capacity (1610 mA h g ~(?1) at 100 mA g ~(?1) ), good cycling stability (retaining 87% after 100 cycles), and competitive rate performance (273 mA h g ~(?1) at 500 mA g ~(?1) ) compared to those of bare SnO _(2) . This sonochemical method can be also applied to the synthesis of other metal-oxide/graphene composites and this work provides a large-scale preparation route for the practical application of SnO _(2) in lithium ion batteries.
机译：通过简便的声化学方法成功地从SnCl_（2）和氧化石墨烯（GO）前体合成了SnO_（2）/石墨烯纳米复合材料。在声化学过程中，先将Sn〜（2+）均匀地分散在GO表面，然后在连续不断还原GO的石墨烯纳米片（RGO）的两侧原位氧化为SnO _（2）纳米颗粒。超声处理。石墨烯不仅提供机械支撑以减轻SnO_（2）阳极的体积变化并防止纳米颗粒团聚，而且还充当导电网络以促进电荷转移和Li〜（+）扩散。当用作锂离子电池（LIB）阳极时，SnO_（2）/石墨烯纳米复合材料的比容量显着提高（在100 mA g〜（？1）时为1610 mA hg〜（？1）），良好的循环稳定性（与裸SnO_（2）相比，在100个循环后保持87％的电导率）和竞争速率性能（在500 mA g〜（？1）时具有273 mA hg〜（？1））。该声化学方法还可以应用于其他金属氧化物/石墨烯复合材料的合成，这项工作为在锂离子电池中实际应用SnO_（2）提供了大规模的制备途径。

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