One-pot synthesis of Ni-thiophene dicarboxylate framework@rGO aerogels with enhanced conductivity and ion accessibility for high-performance supercapacitors

Three-dimensional Ni-TDA@rGO composite aerogels were synthesized by a one-step solvothermal method. • The interconnected porous rGO conductive network enhances the electrical conductivity of Ni-TDA. • Ni-TDA@rGO-20 has a specific capacitance of 117.36 mAh g⁻¹ at 0.5 A g −1 . Designing high-conductivity and structurally stable MOF composites with abundant accessible active sites still faces great challenges. Herein, Ni-TDA@rGO composite aerogels are prepared via a simple one-pot solvothermal method. The introduced rGO constructs a continuous 3D conductive network to accelerate charge transport, and the hierarchical porous structure ensures full electrolyte contact and sufficient exposure of electroactive sites. The obtained electrode delivers a high specific capacity of 117.36 mAh g⁻¹ at 0.5 A g⁻¹. The assembled asymmetric supercapacitor achieves an energy density of 31.6 Wh kg⁻¹ at 795 W kg⁻¹, and retains 90% capacity after 10000 cycles. The outstanding electrochemical performance is attributed to the synergistic effect of rGO, which effectively prevents MOF aggregation and greatly accelerates electron and ion diffusion. This work offers a feasible strategy for developing advanced electrode materials, and MOF-based composites possess broad application prospects in high-efficiency energy storage devices. Download: Download high-res image (217KB) Download: Download full-size image