The Effect of Metal Cation Doping on the Microstructure and Electrochemical Properties of Co-Fe Layered Double Hydroxide

A hydrothermal method is employed to successfully fabricate Co-Fe LDH self-supported materials on a nickel foam substrate. Ni2+ 2+ and Mn2+ 2+ are additionally incorporated into the materials. The electrode materials are subjected to phase analysis using an X-ray diffractometer. The electrode materials are analyzed for morphology employing a scanning electron microscope. Electrochemical characteristics of the electrode materials are assessed by cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy tests using an electrochemical workstation. The research results demonstrate that the electrode materials doped with Ni2+ 2+ and Mn2+ 2+ exhibit significantly enhanced electrochemical properties. The Ni2+-doped 2+-doped Co-Fe LDH exhibits a charge-discharge duration of 2200 s with a specific capacitance of 1036.4 C g-1, - 1 , whereas the Mn2+-doped 2+-doped Co-Fe LDH shows a specific capacitance of 708.1 C g-1. -1 . Furthermore, the calculation of specific capacitance at different current densities indicates that the electrode doped with Ni2+(71.20%) 2+ (71.20%) and Mn2+ 2+ (74.00%) outperform the Co-Fe LDH electrode (67.39%) in terms of rate capability. : 203 8 109 20 On: Wed 28 Aug 2024 10 09:49