Magnesium battery having a cathode containing manganese dioxide nanoparticles as active material

摘要

A MnO2 electrode active material of high capacity is provided. The high capacity MnO2 has a surface area which is greater than 60 m2/g and the MnO2 is obtained by a process comprising a redox reaction of a Mn (II) salt and permanganate at a reaction temperature less than 30° C. and a pH of 2 to 4. Also provided are a magnesium electrochemical cell having a cathode containing the MnO2 and a rechargeable magnesium battery having a cathode containing the MnO2.

主权项

1. A magnesium cell, comprising:
an anode comprising magnesium; a non-aqueous electrolyte; and a cathode comprising MnO2 nanoparticles; wherein a surface area of the MnO2 nanoparticles is greater than 60 m2/g, the MnO2 nanoparticles comprise at least one phase selected from the group consisting of α-MnO2, β-MnO2, δ-MnO2, and γ-MnO2, and the MnO2 nanoparticles are obtained by a process comprising a redox reaction of a Mn(II) salt and permanganate at a reaction temperature less than 30° C. and a pH of 2 to 4.