A flexible, robust cellulose/phytic acid/polyaniline hydrogel for all-in-one supercapacitors and strain sensors

Abstract

Herein, a flexible, stretchable, and high-performance all-in-one supercapacitor was fabricated by in situ growth of polyaniline onto a cellulose hydrogel electrolyte from regenerating cross-linked cellulose network in phytic acid. The...

Role of the electrode-edge in optically sensitive three-dimensional carbon foam-MoS2based high-performance micro-supercapacitors

“…Due to the extensive use of energy storage devices in portable and wearable electronics, micro-supercapacitors are preferred to be flexible, thin, and light weight for practical applications. 64,65 So, a zig-zag edge electrode based device is prepared on a flexible PET substrate. The mechanical flexibility of the device is shown under different bending states (Fig.…”

Swelling-resistant microgel-reinforced hydrogel polymer electrolytes for flexible all-in-one supercapacitors with high performances

“…[6][7][8][9] Especially, all-in-one supercapacitors, a class of integrated supercapacitors with low interfacial resistance and mechanical stability under complex deformation, have received extensive attention. [10][11][12] Currently, in situ polymerization of polyaniline (PANI) or polypyrrole (PPy) on a hydrogel polymer electrolyte (HPE) is performed to fabricate flexible all-in-one supercapacitors. 10,11,13,14 The HPE is often prepared by the gelation of hydrophilic polymer chains via physical or chemical methods.…”

“…[10][11][12] Currently, in situ polymerization of polyaniline (PANI) or polypyrrole (PPy) on a hydrogel polymer electrolyte (HPE) is performed to fabricate flexible all-in-one supercapacitors. 10,11,13,14 The HPE is often prepared by the gelation of hydrophilic polymer chains via physical or chemical methods. [15][16][17] The hydrophilic groups in the HPE can endow the HPE with good water-holding ability; however, many HPEs suffer from great swelling during the in situ deposition of the electroactive polymer.…”

“…6–9 Especially, all-in-one supercapacitors, a class of integrated supercapacitors with low interfacial resistance and mechanical stability under complex deformation, have received extensive attention. 10–12…”

Recent developments of polysaccharide‐based double‐network hydrogels

“…Most hydrogels, especially polysaccharide‐based, have desirable biocompatibility, favorable biodegradability, tunable structure, variable ways of synthesis, and stable physicochemical properties 3 . And these unique features enable them to be widely used in wound healing, 4 tissue engineering, 5 drug delivery, 6 strain sensors, 7 supercapacitors (SCs), 8 aqueous batteries, 9 and other fields 10,11 . However, hydrogels formed via single chemically or physically cross‐linked have poor mechanical properties (stress < sub‐MPa and strain <100%) and weak energy dissipation (0.1–1 J m −2 ) during deformation, which makes them soft, weak, and brittle, severely limit their applications 12 .…”