The pitch-based activated carbons were prepared with KOH/KMnO4 as a multiple function activation agent to increase the specific capacitance of a supercapacitor electrode active material. And the porous structure and electrochemical properties of activated carbon were analyzed on varying amounts of KMnO4. KMnO4 was decomposed into K2O, MnO, and O2 at the activation temperature of KOH, and MnO was introduced to activated carbon. K2O/ O2 reacts with a surrounding pitch to generate micropores and forms a pathway that exposes MnO to the outside. It also affects to the specific surface area of activated carbon like KOH chemical activation. The enhanced specific surface area and introduced MnO in activated carbon led to a 28.9% increase in specific capacitance.

    Abstract
    Acknowledgements 
    References

• Sang Jin Kim(Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Gyeongbuk Science and Technology Promotion Center, Gumi Electronics and information technology research institute (GERI))
• Byong Chol Bai(Strategic Planning Division, Korea Institute of Convergence Textile)
• Min Il Kim(Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
• Young‑Seak Lee(Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Institute of Carbon Fusion Technology (InCFT), Chungnam National University)