Taking sludge-sourced humic acid as precursor,different electrode materials are prepared through changing purification condition and activation temperature,and their structure is characterized by means of BET,XRD,Raman and XPS.Additionally,the electrochemical properties of the prepared materials are measured by using CV,EIS,GCD and cyclic performance tests through establishing a three-electrode system.Results show that the electrode materials prepared exhibit a high specific capacitance of 275.3 F·g-1 after they are purified by humic acid and then activated by KOH at 700℃.Meanwhile,the electrode materials still maintain 95.57％of their specific capacitance after they has been recycled for 1 000 times at a current of 1 A·g-1,showing a good cycle stability.
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