Preparation method of positive electrode active material for high-power high-specific-energy battery type capacitor

The invention discloses a preparation method of a positive electrode active material for a high-power and high-specific-energy battery type capacitor, and belongs to the technical field of battery type capacitors. The positive electrode active material is prepared by the following steps: firstly, obtaining a heteroatom-doped graphene compound through oxidation reduction and hydrothermal reduction methods, and secondly, preparing a heteroatom-doped graphene/activated carbon/lithium cobalt oxide composite positive electrode material through high-speed dispersion and mechanical mixing methods; the positive electrode active material for the battery type capacitor has the advantages of large electrolyte storage capacity and low internal resistance of a prepared pole piece, ensures that the battery type capacitor has high specific energy and specific power at the same time, and has excellent cycling stability of 100% DOD under high potential. 本发明公开了一种高功率高比能电池型电容器用正极活性材料的制备方法，属于电池型电容器技术领域；所述正极活性物质是首先通过氧化还原和水热还原法获得杂原