【摘要】 采用静电纺丝制备得到碳纳米纤维（CNFs）无纺布,经预氧化、碳化处理后作为电极支撑材料,再由水热法合成得到海胆状CNFs/Co₃O₄和雪花型CNFs/Co₃O₄-S两种形貌的复合电极材料.通过扫描电子显微镜（SEM）,傅里叶红外光谱（FTIR）和X线衍射（XRD）对复合电极材料形貌和结构进行表征,并对其电化学性能进行详细测试.结果表明:在1A/g的电流密度下,雪花型CNFs/Co₃O₄-S比海胆状CNFs/Co₃O₄复合电极材料具有更高的比电容,为451.11F/g,且在1500次充放电后其比电容保留率高达88.07%,具有良好的循环稳定性.更多还原

【Abstract】 Carbon nanofibers（CNFs）non-woven fabrics prepared by electrospinning were used as electrode support materials after pre-oxidation and carbonization.Different morphologies of composite electrode materials with sea urchin-like CNFs/Co₃O₄and snowflake-like CNFs/Co₃O₄-S were synthesized by hydrothermal method.Scanning electron microscopy（SEM）,Fourier transform infrared spectroscopy（FTIR）and X-ray diffraction（XRD）were respectively used to characterize the composites.The electrical performance and properties of the composites were measured by cyclic voltammetry,galvanostatic charge-discharge and impedance methods.The result illustrated that the snowflake-like CNFs/Co₃O₄-S composite electrode under 1 A/g electric current density has a higher electrochemical capacitance of 451.11 F/g and maintained 88.07%of its initial capacitance after1 500 cycles.更多还原