超声化学法合成有序 SnO₂/CMK-3 纳米复合材料及其储锂性能。
Sonochemical synthesis of ordered SnO₂/CMK-3 nanocomposites and their lithium storage properties.
机构信息
Key Laboratory of Eco-textiles, Ministry of Education, Jiangnan University, Wuxi 214122, P.R. China.
出版信息
ACS Appl Mater Interfaces. 2011 Sep;3(9):3704-8. doi: 10.1021/am200884k. Epub 2011 Sep 1.
In this study, we successfully prepare SnO(2) nanoparticles inside the pore channels of CMK-3 ordered mesoporous carbon via sonochemical method. The content of SnO(2) is 17 wt % calculated according to the energy-dispersive X-ray spectroscopy (EDS) result. CMK-3 with 17 wt % loading of SnO(2) nanoparticles has a large specific surface area and pore volume. Electrochemical performance demonstrates that the ordered SnO(2)/CMK-3 nanocomposites electrode possesses higher reversible capacity and cycling stability than that of original CMK-3 electrode. Moreover, the ordered SnO(2)/CMK-3 nanocomposites electrode also exhibits high capacity at higher charge/discharge rate. The improved electrochemical performance is attributed to the nanometer-sized SnO(2) formed inside CMK-3 and the large surface area of the mesopores (3.4 nm) in which the SnO(2) nanoparticles are formed.
在这项研究中，我们通过超声化学法成功地将 SnO(2)纳米颗粒制备在 CMK-3 有序介孔碳的孔道内。根据能谱仪（EDS）的结果，SnO(2)的含量为 17wt%。负载有 17wt%SnO(2)纳米颗粒的 CMK-3 具有较大的比表面积和孔体积。电化学性能表明，有序的 SnO(2)/CMK-3 纳米复合材料电极具有比原始 CMK-3 电极更高的可逆容量和循环稳定性。此外，有序的 SnO(2)/CMK-3 纳米复合材料电极在较高的充放电速率下也表现出较高的容量。电化学性能的提高归因于 CMK-3 内部形成的纳米尺寸的 SnO(2)和介孔（3.4nm）的大表面积，其中形成了 SnO(2)纳米颗粒。
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