Flexible Solid PANI Fiber Networks/Ni-MOF@CC Electrodes for High-Performance Capacitors: Synthesis and Stability Study

In this work, the nickel-based metal organic framework (Ni-MOF) is attached to the conductive carbon cloth (CC) by using a hydrothermal reaction. In order to make MOFs strongly interacted with CC, polymeric molecules of polyaniline (PANI) are deposited on Ni-MOF@CC employing an in-situ polymerization method. The PANI shows a three-dimensional fiber-network morphology. Due to the improved electrical conductivity and the porous networks, the electrochemistry property of the obtained flexible PANI/Ni-MOF@CC is greatly enhanced compared with Ni-MOF@CC. The specific capacitance of PANI/Ni-MOF@CC reaches 109 F cm(-2)(573 F g(-1)). The optimum energy density of PANI/Ni-MOF@CC at 0.1 A cm(-2)can be 7 mWh cm(-2)with power density of 70 mW cm(-2). Because the fiber networks of PANI on MOF enhances the interactions between MOF and CC, the PANI/Ni-MOF@CC shows high stability of 95 % capacitance retention after 5000 charge-discharge cycling.