Magnesium ion super capacitor and manufacturing method thereof

The invention discloses a magnesium ion super capacitor and a manufacturing method thereof. The magnesium ion super capacitor is composed of a positive electrode, a negative electrode, a diaphragm between the positive electrode and the negative electrode, and electrolyte. The positive electrode is composed of a current collector and a positive mixture, which is coated on the positive electrode current collector and contains positive materials which can embed and release Mg2+; the electrolyte is organic solution capable of providing magnesium ions. The magnesium super capacitor has the advantages of being low in cost, pollution-free, less prone to forming metal dendritic crystal, and capable o improving the safety of relevant super capacitors. By optimizing proportion of materials of the positive electrode and the negative electrode, the manufactured magnesium ion supper capacitor can obtain relatively high energy density and power density.