As a kind of energy storage devices

supercapacitors (SCs) have attracted widespread attention for their advantages of high power density

good charging and discharging efficiency

wide operating temperature windows

and a long cycle life. As an electrode material

polyaniline (PANI) has the advantages of multiple intrinsic redox states and high theoretical capacitance

which is conducive to improving the energy density of supercapacitors. However

due to the unsatisfied stability of pure polyaniline and poor processing performance

the introduction of transition metal oxides (TMOs) can promote the oxidation-reduction reaction

accelerate the speed of electron transfer

and effectively improve the specific capacitance and circulation stability of electrode materials through the synergistic effect of the two components. In this paper

the new progress of TMOs/PANI nanocomposites such as Ruthenium

manganese

nickel and cobalt involved supercapacitors is reviewed

and the conductive mechanism of TMOs/PANI nanocomposites is summarized and concisely discussed.