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本文采用一种简单有效的湿化学策略将三维MoSe_2超薄纳米结构均匀分散在石墨烯纳米片上,“一锅法”制备得到了MoSe_2/rGO纳米复合结构.石墨烯作为支撑,不但能有效防止MoSe_2的团聚,而且使MoSe_2均匀分散在石墨烯纳米片上.由于这种独特的复合结构,MoSe_2/rGO作为钠离子电池负极材料表现出优异的电化学性能.在半电池中,MoSe_2/rGO复合纳米材料在8 Ag~(-1)电流密度下提供的容量为200.2mA h g~(-1),在5A g~(-1)电流密度下循环100次,其容量可保持在230.1mA h g~(-1).当和Na_3V_2(PO_4)_3正极组成钠离子全电池,在0.5A g~(-1)的电流密度下提供的容量为200.2mAh g~(-1),即使在10A g~(-1)的高电流密度下,MoSe_2/rGO复合纳米材料仍然可以获得56.4mAh g~(-1)放电容量,表明MoSe_2/rGO纳米复合材料作为钠离子存储材料具有较高的功率密度.
In this paper, a simple and effective wet chemical strategy was used to disperse the three-dimensional MoSe_2 ultrathin nanostructures uniformly on graphene nanosheets. The MoSe_2 / rGO nanocomposite structure was prepared by “one-pot method.” Graphene was not only effective MoSe_2 / rGO as the negative electrode material of sodium ion battery show excellent electrochemical performance due to the unique composite structure, MoSe_2 / rGO composite The nanomaterials have a capacity of 200.2 mA hg ~ (-1) at current density of 8 Ag ~ (-1) and 100 cycles at a current density of 5A g ~ (-1), the capacity of which can be maintained at 230.1mA hg ~ (-1). When the sodium ion battery is composed of the positive electrode of Na_3V_2 (PO_4) _3, the capacity of 200.2mAh g ~ (-1) is provided at the current density of 0.5A g ~ (-1) (-1), the discharge capacity of MoSe_2 / rGO nanocomposites can still reach 56.4mAh g -1, indicating that MoSe_2 / rGO nanocomposites have high power density as sodium ion storage materials.