Tetraalkylammonium-based poly(ionic liquid)s(PILs)are able to absorb particularly large amounts of CO2; thus are considered up-and-coming materials in applications ranging from sensing,separation,to storage of CO2.To meet the requirements of practical usage,their chemical activity has to be combined with other functionalities,for example,by fabricating composite materials.Poly[(p-vinylbenzyl)trimethylammonium hexafluorophosphate] and La2O2CO3 nanoparticles—both of which are intrinsically insulating materials are utilized as building blocks,taking full advantage of the electrostatic interaction at their interface to boost the overall conductivity of composites at room temperature.