论文部分内容阅读
采用静电纺丝技术制备了柔性煤基碳纳米纤维(CBCNFs)。利用低温等离子体技术对CBCNFs进行改性,并将改性后的CBCNFs作为还原剂与KMn O4反应,以实现Mn O2的原位还原负载制备CBCNFs/Mn O2复合材料。通过X射线衍射、扫描电镜和透射电镜等手段对复合材料的结构与形貌进行了表征;另外,研究了其作为柔性超级电容器电极材料的性能。结果表明,KMn O4∶CBCNFs=2∶1(质量比)条件下制备的复合材料(CBCNFs/Mn O2-2)具有良好的电化学性能。在0.1A·g-1电流密度下,CBCNFs/Mn O2-2的比电容高达118F·g-1,为CBCNFs比电容(26F·g-1)的4.5倍,在1A·g-1电流密度下,循环1000次后比容量保持率为97%,表现出良好的循环稳定性。
Flexible coal-based carbon nanofibers (CBCNFs) were prepared by electrospinning. CBCNFs were modified by low temperature plasma technique, and the modified CBCNFs were used as reductant to react with KMn O 4 to prepare MnC O 2 composites for in situ reduction of Mn O 2. The structure and morphology of the composites were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. In addition, the properties of the composites as a material for the flexible ultracapacitor electrode were investigated. The results show that the composites (CBCNFs / Mn O2-2) prepared at KMnO4: CBCNFs = 2:1 (mass ratio) have good electrochemical performance. The specific capacitance of CBCNFs / Mn O2-2 was as high as 118F · g-1 at current density of 0.1A · g-1, which was 4.5 times that of CBCNFs (26F · g-1) , The specific capacity retention rate was 97% after 1000 cycles, showing good cycle stability.