Self‐Standing Hydrogels Composed of Conducting Polymers for All‐Hydrogel‐State Supercapacitors

Abstract

Conducting polymerh ydrogels that are capable of contacting with electrolytes at the molecular level, represent an important electrode material. However,t he fabrication of self-standing hydrogels merely composed of conducting polymers is still challenging owing to the absence of reliable methods. Herein, an ovel and facile macromolecular interaction assisted route is reported to fabricate self-standingh ydrogelsc onsisting of polyaniline (PANi:p roviding high electrochemical activity) and poly(3,4-ethylenedioxythiophene) (PEDOT: enabling high electronic conductivity). Owing to the synergistic effect between them, the self-standingh ydrogels possess good mechanical properties and electronic/electrochemicalp erformances, making them an excellent potential electrode for solid-state energy storaged evices.Aproof-ofconcept all-hydrogel-state supercapacitor is fabricated, which exhibits ah igh areal capacitance of 808.2 mF cm À2 , and ah igh energy density of 0.63 mWh cm À3 at high power density of 28.42 mW cm À3 ,s uperior to many recently reported conductingp olymer hydrogels based supercapacitors. This study demonstrates an ovel promising strategy to fabricate self-standingc onducting polymer hydrogels.

Electrode Materials for Supercapacitors: A Review of Recent Advances

“…(Figure 17). For instance, Yang et al [352] exploited a simple macromolecular interaction assisted route to synthesize a self-standing CP hydrogel composed by PANI and PEDOT. The resultant hydrogel showed a high mechanical performance, good electronic conductivity, and good electrochemical properties simultaneously, owing to the synergic effect between PANI and PEDOT.…”

Free-standing conductive hydrogel electrode for potentiometric glucose sensing

“…Recently, FSC hydrogels have been developed for supercapacitors. [16][17][18][19] One of the synthetic routes for the FSC hydrogels is based on in situ polymerization of monomers in an insulative matrix polymer. 17 In particular, polyaniline (PANI), which is used as a conductive polymer, shows the expected electrochemical properties in polyvinyl alcohol (PVA) as an insulative matrix.…”

“…[16][17][18][19] One of the synthetic routes for the FSC hydrogels is based on in situ polymerization of monomers in an insulative matrix polymer. 17 In particular, polyaniline (PANI), which is used as a conductive polymer, shows the expected electrochemical properties in polyvinyl alcohol (PVA) as an insulative matrix. 19 In this synthetic route, amino phenylboronic acid (APBA) is copolymerized with ANI [P(ANI-APBA)] and used as a cross-linker with the PVA matrix on the basis of the specic binding between PBA and diol molecules such as PVA (Fig.…”

Nucleotide‐Tackified Organohydrogel Electrolyte for Environmentally Self‐Adaptive Flexible Supercapacitor with Robust Electrolyte/Electrode Interface

“…Recently, hydrogels are regarded as desirable candidates of electrolytes for flexible supercapacitors to meet the above demands due to their merits of mechanical flexibility, great conductivity, portability, and reliable safety. [ 4,5 ] Hydrogel electrolytes are generally constructed by integrating acid (e.g., H 2 SO 4 , H 3 PO 4 ), [ 6–8 ] alkali (e.g., KOH), [ 9 ] salts (e.g., LiCl, KCl, NaCl), [ 10–13 ] or ionic liquids [ 14,15 ] into polymer networks, which reduces the risk of electrolyte leakage by immobilizing the electrolyte solution in polymer matrices. [ 16 ]…”