Supercapacitive performance of polyaniline coated CoFe Prussian blue analogue composite
-
摘要: 制备了聚苯胺包覆CoFe类普鲁士蓝纳米立方(CoFePBA@PANI)复合材料,采用XRD、FTIR、SEM和TEM对CoFePBA@PANI复合材料的结构和形貌进行表征,利用循环伏安法(CV)、恒电流充放电法及交流阻抗法(EIS)对CoFePBA@PANI复合材料的电化学性能进行了考察。结果表明:通过植酸的配位作用促使苯胺在具有面心立方结构的CoFePBA表面发生聚合反应,形成了具有核-壳结构的CoFePBA@PANI复合材料。系统地研究了PANI的含量对CoFePBA@PANI复合材料电化学性能的影响,CoFePBA@PANI复合材料在0.5 mol/L Na2SO4和H2SO4的混合酸性介质中,在1 A/g电流密度下,比电容值达到401.2 F/g,电流密度增大至10 A/g时,比电容仍能保持在367.3 F/g。Abstract: The polyaniline coated CoFe Prussian blue analogue(CoFePBA@PANI) composites were synthesized to seek high electrochemical performance. The structure and morphology of CoFePBA@PANI composite were characterized by XRD, FTIR, SEM and TEM. The electrochemical properties of CoFePBA@PANI composite were investigated by cyclic voltammetry (CV), galvanostatic charge-discharge test and electrochemical impedance spectroscopy (EIS). By using phytic acid (PA) as a chelating agent, the PANI is coated on the surface of CoFePBA to form the CoFePBA@PANI composite with core-shell structures. In the mixed acidic electrolyte of 0.5 mol/L Na2SO4 and H2SO4, the CoFePBA@PANI composite exhibits specific capacitances as high as 401.2 F/g and 367.3 F/g at the current density of 1 A/g and 10 A/g, respectively.
-
Keywords:
- supercapacitor /
- electrode material /
- Prussian blue /
- polyaniline /
- core-shell structure /
- composite
-
-
计量
- 文章访问数: 1091
- HTML全文浏览量: 108
- PDF下载量: 166