Preparation and electrochemical properties of two-dimensional nanorod structure CoMn2O4/CC electrode materials

Metal oxides are often used as electrode materials for supercapacitors due to their high capacity, low cost, suitability for commercialization, and environmental protection. Mn-MOF was used as a precursor, and it was placed in ethanol for ion exchange and etching reaction with Co(NO (3) ) (2) , and then heat-treated in air, and finally a highly crystalline CoMn (2) O (4) two-dimensional nanorod structure was obtained on a carbon cloth (CC) substrate. CoMn (2) O (4) /CC prepared with different Co(NO (3) ) (2) addition amounts and Mn (2) O (3) /CC obtained by direct heat treatment were analyzed by SEM and XRD, and the electrochemical performance was tested by cyclic voltammetry, constant current charge-discharge test, and AC impedance test. The results show that after 0.3 g CoNO (32) etching, the matrix structure of CoMn (2) O (4) /CC is relatively well preserved, forming a hollow nanostructure. After heat treatment, the vertical nanorod structure grown in situ on the carbon cloth uniformly and densely wraps the carbon fiber. Since no adhesive is added, high mechanical stability and conductivity are ensured. At a current density of 1.2 mA center dot cm (-2) , the electrode material has an area specific capacitance of 809.8 mF center dot cm (-2) ; at a current density of 5 mA center dot cm (-2) , the capacitance retention rate is 79.1% after 5000 cycles, which is an electrode material with potential application prospects.