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In this study mesophase pitch carbon microbeads (MCMB) were activated by KOH with various mass ratios (4:1, 6:1, and 8:1) and activation temperatures (600, 700, and 800°C). The activated MCMB was used as the electrode materials for supercapacitors. The effects of the KOH/MCMB ratios and the activation temperatures on the surface characterization and electrochemical properties were investigated. A...