Preparation and environmental impact assessment of NI-N modified sludge activated carbon electrode materials

Abstract

With the activated sludge in urban sewage treatment as the precursor material, the carbon material is prepared by high temperature carbonization, and then the nickel-nitrogen modified activated carbon material is prepared by potassium hydroxide activation, urea and nickel doping. Electrochemical experiments with activated carbon materials show that it has a good specific capacitance of 345.9 F/g at 1 A/g current density. After 2 000 cycles at a current density of 10 A/g, it still maintains 84.53% capacitance, shows found that the main source of influence is the power consumption in the process of sludge carbonization.