The Capacitive Behaviors of Manganese Dioxide Thin-Film Electrochemical Capacitor Prototypes

Table 1

Specific capacitance (F/g) of MnO₂ thin-film electrochemical capacitor prototypes calculated from cyclic voltammograms (CVs) at different scan rates, and electrochemical impedance spectroscopy (EIS) at the frequency of 10 mHz.

Scan rate (mV/s)^a	Specific capacitance (F/g)
	CV	EIS^b	GCD^c
10	327	289
25	291	290	239 (discharge)
50	256	290
100	214	288
150	174	270
200	152	261
300	119	266

^aThe scan rate was applicable for CV only.
^bEIS was conducted on the same electrode immediately after each CV test.
^cGalvanostatic charge/discharge conducted at a current density of 0.08 mA.