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The negative effect of low temperature on the capacitive behavior of MnO2 nanorods in 4 M KOH is studied by cyclic voltammetry, constant current charge/discharge and electrochemical impedance techniques. The results show the discharge specific capacitance reduces from 270 to 80 F g−1 at 0.2 A g−1 as the temperature decreases from 20 to −20 °C due to the faded mass transportation and charge transfer...
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