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为了满足超级电容器对于高性能电极材料的需求，结合常规的水热法和煅烧法，在碳布(CC)表面制备氧空位丰富的过渡金属氧化物赝电容电极材料CuCo_2O4/CC。通过X射线衍射仪(XRD)、电子自旋共振(ESR)波谱仪、扫描电子显微镜(SEM)和X射线光电子能谱仪(XPS)等表征手段，详细表征了CuCo_2O4/CC的物相、结构、形貌以及表面元素化学信息等。研究了制备过程中H_2O2的添加量对产物中氧空位含量的影响。结果表明，当H_2O2的添加量为10μL时，CuCo_2O4/CC的氧空位占比最大，高达55.8%。在丰富的氧空位和特殊的形貌结构协同作用下，结构优化的CuCo_2O4-2/CC表现出了优异的电化学性能。在3 mol/L KOH作为电解质的三电极电化学测试系统中，CuCo_2O4-2/CC电极材料在电流密度1 A·g-1下比电容可高达968.5 F·g-1;在电流密度10 A·g-1下循环测试8 000次后，比电容保持率为85.1%。这些电化学特性表明，氧空位丰富的CuCo_2O4/CC可以成为超级电容器高性能电极的选择之一。
Abstract：To meet the needs of supercapacitors for high-performance electrode materials, the transition metal oxide pseudocapacitance electrode material CuCo_2O4/CC with abundant oxygen vacancies was prepared on the surface of carbon cloth(CC) by combining the hydrothermal and calcination methods. The phase, structure, morphology and chemical information of surface elements of the CuCo_2O4/CC were characterized in detail by X-ray diffractometer(XRD), electron spin resonance(ESR) spectrometer, scanning electron microscope(SEM) and X-ray photoelectron spectrometer(XPS). The effect of the additive amount of H_2O2 on the content of oxygen vacancies for the product in the preparation process was studied. The results show that when the additive amount of H_2O2 is 10 μL, the proportion of the oxygen vacancies in the CuCo_2O4/CC is the highest and reaches 55.8%. Due to the synergistic effect of the abundant oxygen vacancies and special morphological structure, the CuCo_2O4-2/CC after structural optimization exhibits outstanding electrochemical performance. In the three-electrode electrochemical test system with 3 mol/L KOH as electrolyte, the specific capacitance of the CuCo_2O4-2/CC electrode material is up to 968.5 F·g-1 at a current density of 1 A·g-1. After 8 000 cycles of testing at a current density of 10 A·g-1, the specific capacitance retention is 85.1%. The electrochemical characte-ristics indicate that the CuCo_2O4/CC with abundant oxygen vacancies can be one of the choices of high performance electrodes for supercapacitors.
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基本信息:
DOI：10.13250/j.cnki.wndz.2022.10.009
中图分类号:TM53;TB332
引用信息:
[1]罗小虎,郭蒙,卯遥遥,等.CuCo_2O_4/CC电极材料的制备及其电化学性能[J].微纳电子技术,2022,59(10):1035-1042.DOI:10.13250/j.cnki.wndz.2022.10.009.
基金信息:
贵州省教育厅自然科学项目(黔教合KY字[2015]342); 黔南民族师范学院校级项目(2020qnsyzd01,QNYSKYPT2018005);黔南民族师范学院大学创新创业项目(202110670004,202110670006)
2022-10-15
2022-10-15