In article number 2009018, Jae Yeong Park and co-workers successfully mitigate the aggregation restacking of phosphorene nanosheets by encapsulation with polyaziridine (PEP) doping on porous 3D graphene (3DPG) structure. The newly fabricated flexible PEP/3DPG is evaluated as a potential electrode for immunosensing, electrocardiogram recording, microsupercapacitors.