Monodisperse SnO2 anchored reduced graphene oxide nanocomposites as negative electrode with high rate capability and long cyclability for lithium-ion batteries
Monodisperse SnO2 anchored reduced graphene oxide nanocomposites as negative electrode with high rate capability and long cyclability for lithium-ion batteries
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DOI：
10.1016/j.jpowsour.2014.03.085
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发表时间：
2014-09-15
影响因子：
9.2
通讯作者：
Liu, Hongtian
中科院分区：
文献类型：
--
作者：
Guo, Jinxue;Jiang, Bin;Liu, Hongtian
在这篇手稿中，我们提出了一个简单和友好的湿化学方法来制备单分散的SnO 2纳米晶组装在还原氧化石墨烯（RGO）。在十二烷基磺酸钠的辅助下，SnO 2纳米粒子（约5 nm）均匀致密地沉积在柔性支撑体上。一种廉价的化合物，尿素，用于控制沉淀的SnO 2和氧化石墨烯的还原。当作为阳极材料测试时，混合复合电极在高电流密度下提供优异的循环能力，例如在0.5A g（-1）下400次循环后超过1000 mAh g（-1）的高可逆容量和在1A g（-1）下400次循环后类似于560 mAh g（-1）的高可逆容量。该复合材料在0.1 ~ 4 A g（-1）范围内具有良好的上级倍率性能，在4 A g（-1）下的容量为423 mAh g（-1）。这种合成策略似乎适合于工业生产，也可以扩展到生产各种金属氧化物/RGO复合材料。(C)2014爱思唯尔有限公司版权所有。
In this manuscript, we present a facile and friendly wet chemical method to prepare monodisperse SnO2 nanocrystals assembled on reduced graphene oxide (RGO). Aided with sodium dodecyl sulfonate, small SnO2 nanoparticles (similar to 5 nm) are deposited onto the flexible support evenly and tightly. A cheap compound, urea, is used for the controlled precipitation of SnO2 and the reduction of graphene oxide. When tested as the anode material, the hybrid composite electrode delivers excellent cyclability at high current density, such as high reversible capacity over 1000 mAh g(-1) after 400 cycles at 0.5 A g(-1) and similar to 560 mAh g(-1) after 400 cycles at 1 A g(-1). The composites also exhibit superior rate capability varying from 0.1 to 4 A g(-1), and possess capacity of 423 mAh g(-1) at 4 A g(-1). This synthesis strategy seems to be suitable for industrial production and can also be extended to produce a variety of metal oxide/RGO composites. (C) 2014 Elsevier B.V. All rights reserved.