Nanoflake Manganese Oxide and Nickel-Manganese Oxide Synthesized by Electrodeposition for Electrochemical Capacitor

Table 1

Synthesis method, physicochemical features, and subsequent specific capacitance of crystalline MnO₂.

Technique	Morphology	Structure	/m^2·g^−1	Capacitance , F/g
Hydrothermal [17]	Platelike, nanorod	α-MnO2	100–150	72–160 (200 mA·g^−1)
High viscosity process [18]	Rod-shaped	α-MnO2, -MnO2	—	389 (10 mV·s^−1)
Room temperature precipitation [19]	Rod-shaped	-MnO2	—	201
Low temperature reduction [20]	Nanoflower	Cubic MnO2 (Fd3m)	225.9	121.5 (1000 mA·g^−1)
Sol-gel process [21]	Nanorods	-MnO2		317 (100 mA·g^−1)