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Electrochemical double layer capacitor is a new technology for the storage of electrical energy. Electrical energy storage will be a critical issue in many renewable energy systems. Electrochemical double layer capacitor technology along with fuel cell or battery can address many issues related to effective electrical energy storage. An Internal resistance and pulse current are considered as output parameters in any electrochemical double layer capacitor for its performance analysis. Capacitance value of capacitor is very important in energy storage system, as it is possible to store huge amount of charge by means of electrochemical double layer capacitor. Hence, capacitance is considered as an output parameter in the presented work. This paper presents the effect of ball milling of an electrode material on the capacitance of an aqueous metal oxide based electrochemical double layer capacitor

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