Moisture-electric foam based on dendritic colloids and polypyrrole-modified graphene oxide prepared by template method

Constructing a porous structure in moisture-electric generators (MEGs) is an effective strategy to increase the output power. However, the rapid and large-scale preparation of foam-based MEGs with controllable structures still faces challenges. Here, a moisture-electric (PGO@PVA) foam based on polypyrrole (PPy)-modified GO (PGO) and polyvinyl alcohol dendritic colloids were prepared by turbulent shear precipitation and template method. Consequently, the size and amount of PMMA particles were adjusted to control the porosity and pore size of PGO@PVA foam. With the mass ratio (PPy: GO = 2:1) of PPy/GO, PMMA size of 200 mesh, and the ratio between PMMA particles and PVA dendritic colloids of 10:1, the PGO@PVA foam illustrates 0.73 V of Uoc, 64 mu A of Isc, 9.34 mu W cm-2 of power density and 12.98 mu Wh center dot cm- 2 of energy density. This work provides a novel strategy for efficient and large-scale preparation of high-performance MEGs with a tunable pore structure.