三氧化钼纳米带自组装柔性薄膜超级电容器的制备及其性能研究

Preparation and Properties of MoO3 Nanobelts Self-assembled Flexible Film Supercapacitors

采用单质钼为钼源,水热合成了具有高长径比的三氧化钼(MoO3)纳米带,并通过减压抽滤制备了MoO 3纳米带自组装柔性薄膜。对MoO3纳米带的形貌和结构进行了表征,采用三电极体系研究了MoO3纳米带的电化学电容行为,考察了MoO3纳米带自组装柔性薄膜直接作为电极组装柔性薄膜电容的性能。实验结果表明,MoO3纳米带的长度为6~10μm,宽度为100~300 nm,厚度为7~10nm,MoO3纳米带自组装薄膜显示了很高的柔性,在100 mV/s的扫描速率下面积比电容为340 mF/cm2。以此组装的柔性薄膜电容在5 mA/cm 2的电流密度下,2000圈循环后电容保持率可达80%。

Using molybdenum powders as precursor,the MoO 3 nanobelts with high aspect ratio were synthesized by hydrothermal method.The MoO 3 nanobelts self-assembled films were further fabricated by vacuum-assisted filtration.The morphology and structure of MoO 3 nanobelts were characterized,and the electrochemical capacitance behavior of MoO 3 nanobelts was studied by three-electrode method.The capacitance performances of MoO 3 nanobelts film assembled flexible supercapacitors were also studied.The experimental results show that the MoO 3 nanobelt has a length of about 6~10μm,a width of 100~300 nm,and a thickness of about 7~10 nm.The MoO 3 nanobelt self-assembled film exhibits a high flexibility.The MoO 3 film has an area specific capacitance of 340 mF/cm 2 at a scan rate of 100 mV/s.The capacitance retention rate can reach 80%after 2000 cycles at a current density of 5 mA/cm 2.