摘要
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_(2)O_(4)/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_(2)O_(4)/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_(2)O_(2)的添加量对产物中氧空位含量的影响。结果表明,当H_(2)O_(2)的添加量为10μL时,CuCo_(2)O_(4)/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_(2)O_(4)-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_(2)O_(4)-2/CC电极材料在电流密度1 A·g^(-1)下比电容可高达968.5F·g^(-1);在电流密度10 A·g^(-1)下循环测试8000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_(2)O_(4)/CC可以成为超级电容器高性能电极的选择之一。
To meet the needs of supercapacitors for high-performance electrode materials,the transition metal oxide pseudocapacitance electrode material CuCo_(2)O_(4)/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_(2)O_(4)/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_(2)O_(2) 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_(2)O_(2) is 10μL,the proportion of the oxygen vacancies in the CuCo_(2)O_(4)/CC is the highest and reaches 55.8%.Due to the synergistic effect of the abundant oxygen vacancies and special morphological structure,the CuCo_(2)O_(4)-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_(2)O_(4)-2/CC electrode material is up to 968.5 F·g^(-1) at a current density of 1 A·g^(-1).After 8000 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_(2)O_(4)/CC with abundant oxygen vacancies can be one of the choices of high performance electrodes for supercapacitors.
作者
罗小虎
郭蒙
卯遥遥
王玉林
吴大旺
Luo Xiaohu;Guo Meng;Mao Yaoyao;Wang Yulin;Wu Dawang(School of Chemistry and Chemical Engineering,Qiannan Normal University for Nationalities,Duyun 558000,China)
出处
《微纳电子技术》
CAS
北大核心
2022年第10期1035-1042,共8页
Micronanoelectronic Technology
基金
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)。
