Abstract:
An effective strategy was developed to improve the conductivity of metal-organic framework materials HKUST-1 by interweaving nano-HKUST-1 with polyaniline (PANI) as the supercapacitors(SCs).The electrochemical properties of nHKUST-1/PANI were tested by means of cycle voltammetry (CV), AC impedance (EIS), galvanostatic charge discharge(GCD), and circulating charge and discharge test. In 1 mol/L KOH solution, the capacitance of nHKUST-1 electrode showed 103 F/g at 1 A/g, and the capacitance of PANI electrode was 344 F/g at 1 A/g in a three-electrode system. Moreover, the nHKUST-1/PANI electrode yielded a remarkable capacitance of 238 F/g(1 A/g, mass ratio 1∶1), which is nearly 2.2 times greater than the capacity of nHKUST-1 electrode. The mass ratio of nHKUST-1/PANI(1∶2) electrode showed capacitance of 244 F/g at a current density of 1 A/g, almost 2.4 times that of nHKUST-1 electrode.After 1 000 cycles, more than 87% of its initial capacitance was still retained.
