Phthalocyanine-Based 2D Conjugated Metal-Organic Framework Nanosheets for High-Performance Micro-Supercapacitors

2D conjugated metal-organic frameworks (2Dc-MOFs) are emerging as a novel class of conductive redox-active materials for electrochemical energy storage. However, developing 2Dc-MOFs as flexible thin-film electrodes have been largely limited, due to the lack of capability of solution-processing and integration into nanodevices arising from the rigid powder samples by solvothermal synthesis. Here, the synthesis of phthalocyanine-based 2Dc-MOF (Ni-2[CuPc(NH)(8)]) nanosheets through ball milling mechanical exfoliation method are reported. The nanosheets feature with average lateral size of approximate to 160 nm and mean thickness of approximate to 7 nm (approximate to 10 layers), and exhibit high crystallinity and chemical stability as well as a p-type semiconducting behavior with mobility of approximate to 1.5 cm(2)V(-1)s(-1)at room temperature. Benefiting from the ultrathin feature, the nanosheets allow high utilization of active sites and facile solution-processability. Thus, micro-supercapacitor (MSC) devices are fabricated mixing Ni-2[CuPc(NH)(8)] nanosheets with exfoliated graphene, which display outstanding cycling stability and a high areal capacitance up to 18.9 mF cm(-2); the performance surpasses most of the reported conducting polymers-based and 2D materials-based MSCs.