In this paper

the basic principle of microcellular foamed polymer-based conductive composites using supercritical fluid as a physical foaming agent is briefly introduced. Several conductive mechanisms of polymer-based composites and its microcellular foamed materials are reviewed. The research status of these composites on the electrical properties in recent years are illustrated summarily. The main factors

such as the characteristics of the matrix

the type of nano-sized conductive fillers

the filler loading content

the dispersion methods of the additives in the matrix

and the cell morphology

which affect the electrical properties of microcellular foamed polymer-based conductive composites are analyzed. Finally

the research trends of the novel microcellular foamed polymer-based conductive composites is prospected.