Flexible Solid-State Supercapacitor Based on a Metal–Organic Framework Interwoven by Electrochemically-Deposited PANI

Abstract

Metal-organic frameworks (MOFs) have received increasing attention as promising electrode materials in supercapacitors (SCs). Yet poor conductivity in most MOFs largely thwarts their capacitance and/or rate performance. In this work, an effective strategy was developed to reduce the bulk electric resistance of MOFs by interweaving MOF crystals with polyaniline (PANI) chains that are electrochemically deposited on MOFs. Specifically we synthesized cobalt-based MOF crystals (ZIF-67) onto carbon cloth (CC) and further electrically deposited PANI to give a flexible conductive porous electrode (noted as PANI-ZIF-67-CC) without altering the underlying structure of the MOF. Electrochemical studies showed that the PANI-ZIF-67-CC exhibits an extraordinary areal capacitance of 2146 mF cm(-2) at 10 mV s(-1). A symmetric flexible solid-state supercapacitor was also assembled and tested. This strategy may shed light on designing new MOF-based supercapacitors and other electrochemical devices.

Electrochemical and viscoelastic evolution of dodecyl sulfate-doped polypyrrole films during electrochemical cycling

“…The latter may aggravate the mechanical properties of CPEs which can be reflected in the viscoelastic variations of polymer electrodes during electrochemical cycling [11][12][13]. Many CPEs have been studied for their appealing electrochemical properties [14], such as poly(3,4-ethylenedioxythiophene) (PEDOT) [15,16], polypyrrole (PPy) [17][18][19], polyaniline (PANI) [8,20] and polythiophene (PHT) [21,22]. PPy has been exploited in considerable amount of researches, due to its relatively higher pseudocapacitance and lower cost, as well as its particularly supreme flexibility in morphology and structure [23].…”

Blending Electronics with the Human Body: A Pathway toward a Cybernetic Future

“…Due to its exceptional stability,124 reasonable biocompatibility,125, 126, 127 and high conductivity,128 its range of applications encompasses a variety of fields including biomedical engineering,129 flexible electronics,130, 131 and electromechanical engineering 132. Moreover, because of PANI's good biocompatibility and high conductivity, it also holds great promise for use in the engineering of electroactive tissues 133, 134.…”

Recent advancements in metal organic framework based electrodes for supercapacitors

“…Organic compounds as additional materials Wang et al [106] reported a novel composite polyaniline-ZIF-67-carbon cloth (PANI-ZIF-67-CC) (Fig. 25).…”