The invention belongs to the field of electrochemical materials, and discloses a method for preparing
graphene /
manganese oxide flexible electrodes by using
laser one-step in-situ reduction of
graphene oxide and decomposing
manganese compounds, which is applied to supercapacitors. Wherein the preparation method of the
graphene /
manganese oxide flexible
electrode comprises the following steps: uniformly mixing the
aqueous solution of graphene oxide and the compound of manganese,
coating on the flexible substrate; under the protection of an
inert atmosphere, utilizing
laser to irradiate the graphene oxide prepared by the above steps /
Manganese compound film: while graphene oxide is reduced to graphene by
laser, manganese compound is thermally decomposed to obtain
manganese oxide. Pure graphene supercapacitors have low specific
capacitance;
manganese oxide supercapacitors have poor cycle stability. Combining these two materials can maximize their strengths and avoid weaknesses, give full play to the advantages of both, and obtain supercapacitors with good cycle stability and high specific capacity. The advantages of the present invention are: one-step laser reduction of graphene oxide and
decomposition of manganese compounds to obtain reduced graphene and
manganese oxide flexible composite electrodes, and assemble them into flexible supercapacitors. The preparation process is simple, the efficiency is high, and the preparation process is green and
environmentally friendly. It can be produced industrially.