2.2.2 KMnO4浓度固定超重力因子为65.32，撞击初速为9.4

2.2.2 KMnO4 concentration <br>fixed gravity factor of 65.32, striking initial velocity 9.43 m • s-1, p -TSA at a concentration of 0.84 mol L-1, the reaction time was 3.5 h, the concentration of KMnO4 oxidizer studied MnO2 / PPy specific capacity Impact. As shown, the same current density, with the increase in the oxidant concentration, MnO2 / PPy composite 4 to reduce the increased capacity first. Analysis of the reasons, Py monomer is oxidized to simultaneously PPy, Mn7 + reduced to Mn4 +. When Py is constant monomer concentration, the amount of KMnO4 oxidation-reduction reaction also occurs with a predetermined value, the system increases with the concentration of KMnO4, causing peroxidation of PPy, destruction of the conjugated chain structure [22], further the reaction will cause the particle surface passivation of the active sites, thereby reducing the specific capacity of the composite. When the concentration of the oxidizing agent constant, as the current density increases, the specific capacity of the composite decreased. This is due to the increase in the current density of ions in the electrolyte so that the absorption and desorption occurs due only storage. Therefore, the choice of the concentration of KMnO4 0.094 mol • L-1 is appropriate.

2.2.2 KMnO4 concentration<br>Fixed excess force factor is 65.32, the initial speed of impact is 9.43 m-s-1, p-TSA concentration is 0.84 mol L-1, the reaction time is 3.5 h, the effect of oxidant KMnO4 concentration on MnO2/PPy ratio capacity was studied. As shown in Figure 4, at the same current density, the MnO2/PPy composite material increases first over capacity and then decreases with the increase of oxidant concentration. To analyze the cause, Py monomer is oxidized to PPy at the same time, Mn7 plus reduced to Mn4 plus. When the concentration of Py monomer is a certain, the amount of KMnO4 with which the oxidation reduction reaction is also a fixed value, with the increase of KMnO4 concentration in the system, resulting in PPy peroxidation, the destruction of conjugate chain structure, but also causethed the reaction activity point of the particle surface blunting, thereby reducing the ratio capacity of the compound. When the concentration of oxidants is certain, the composite ratio decreases gradually as the current density increases. This is due to the increase in current density so that the ions in the electrolyte only occur surface suction reaction storage energy. Therefore, it is appropriate to choose KMnO4 concentration of 0.094 mol-L-1.

2.2.2 KMnO4 concentration<br>The effect of KMnO4 concentration on the specific capacity of MnO2 / PPy was studied. As shown in Figure 4, the specific capacity of MnO2 / PPy composite increases first and then decreases with the increase of oxidant concentration at the same current density. The reason is analyzed. While py monomer is oxidized to PPy, mn7 + is reduced to Mn4 +. When the concentration of Py monomer is fixed, the amount of KMnO4 with which the redox reaction takes place is also a fixed value. With the increase of KMnO4 concentration in the system, the peroxide of PPy is caused, the conjugated chain structure is destroyed [22], and the reactive sites on the particle surface are passivated, thus reducing the specific capacity of the complex. When the oxidant concentration is fixed, the specific capacity of the composite decreases with the increase of current density. This is due to the increase of current density that only surface adsorption and desorption reactions occur in the electrolyte. Therefore, KMnO4 concentration is 0.094 mol · L-1.<br>