A novel Ni/Co metal-organic framework with a porous organic polymer material as a ligand for a high-performance supercapacitor and a glucose sensor

With the development of wearable diagnostic and therapeutic technology, numerous researchers have shown great interest in integrated bifunctional electrode materials with a supercapacitor and sensing performance. Herein, we report a hydrangea-like metal-organic framework (Ni/Co-DAP MOF) with porous organic polymer DAP, obtained through the Schiff-base reaction of 3,5-diaminobenzoic acid (DABA) and terephthalaldehyde (TPAL), as a ligand for a supercapacitor and a glucose sensor. Benefiting from the porous and conjugated structure of DAP, the Ni/Co-DAP MOF presents a high specific capacitance of 2200 F g(-1) at a current density of 1 A g(-1). The asymmetric supercapacitor (ASC) device Ni/Co-DAP MOF//AC ASC with the Ni/Co-DAP MOF as the positive electrode delivers an outstanding energy density of 100.11 W h kg(-1) at a power density of 849.98 W kg(-1) and exhibits an excellent capacitance retention of 94% after 5000 cycles. In addition, the Ni/Co-DAP MOF also demonstrates excellent glucose sensing performance, including a high sensitivity of 278 mu A cm(-2) mM(-1) in the range of 1.67 mu M-8.03 mM and a detection limit of 0.557 mu M (S/N = 3). The excellent electrochemical performance of the Ni/Co-DAP MOF highlights the general relevance of our reasonable design with porous DAP as a ligand and expands its broad prospects for energy storage and electrochemical sensing.

Automated summary

With the development of wearable diagnostic and therapeutic technology, there is increasing interest in integrated bifunctional electrode materials with supercapacitor and sensing performance. In this study, a hydrangea-like metal-organic framework (Ni/Co-DAP MOF) with porous organic polymer DAP was developed, showing excellent electrochemical performance as a supercapacitor and glucose sensor. The design of DAP as a ligand expands the prospects for energy storage and electrochemical sensing.