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Nanocomposite hydrogel based on sodium alginate, poly (acrylic acid), and tetraamminecopper (II) sulfate …
Morphology of the hydrogel and NCH were studied by SEM. As shown in Fig. 2, the relatively porous structure is observed for both the hydrogel and the NCH parison of the image of hydrogel with NCH indicates the presence of the tetraamminecopper (II) sulfate ...
A Powder Self-Healable Hydrogel Electrolyte for Flexible Hybrid …
Herein,a smart ionic conductive hydrogel (SPMA-Zn: ZnSO 4 /sodium alginate/polymethylacrylic acid) is developed for flexible hybrid supercapacitor (SPMA …
Titanium materials as novel electrodes in sodium ion capacitors
The efficient design of electrochemical energy storage devices could lead to less dependence on fossil fuels. • Titanium-based materials are emerging as electrode component in sodium ion capacitors. • The features of the …
Self-healable polyvinyl alcohol-based hydrogel electrolyte for smart electrochemical capacitors …
In 2016, a polymer synthesized by gra ing polyacrylic acid (PAA) onto PVA was applied to a capacitor (PVA-g-PAA), 117 and in 2017, sodium alginate was used to prepare a hydrogel applicable to ...
Recent progress in multifunctional hydrogel-based supercapacitors
Feng et al. developed a multifunctional VHSNPs-PAA/H 2 SO 4 /ARS hydrogel supercapacitor with extremely excellent stretchability and favorable self-healing ability [78].The VHSNPs-PAA/H 2 SO 4 /ARS hydrogel polyelectrolyte copolymerized through VHSNPs and extensive H-bondings is prepared by stirring the …
Hydrogel materials for sustainable water resources harvesting
Paul A et al. used a simple ion gel method to design sodium alginate–calcium chloride hydrogel beads for atmospheric water harvesting. The hydrogel had a moisture absorption capacity of 1.8 g.g −1 at 30 C and 25% relative humidity for 12 h.
Chitosan hydrogel-based electrode binder and …
The EDLCs have been assembled with black pearls carbon as electrode. The ICCSHME has been prepared by ionic cross-linking of chitosan (CS) with sodium sulfate. EDLCs comprising 40 % loading of CCH electrode …
Fabrication of poly(vinyl alcohol) hydrogel beads crosslinked using sodium sulfate for microorganism immobilization …
Fig. 1 shows XRD patterns of PVA–sodium sulfate hydrogel, dried PVA powder, PVA solution and distilled water. Dried PVA powder had an intense peak at about 2θ = 20, which is attributed to diffraction from the (1 0 …
Electrical and Capacitive Response of Hydrogel Solid-Like Electrolytes for Supercapacitors …
PGGA hydrogel (1 mL) was prepared by dissolving PGGA and EDC in 750 µL of sodium hydrogen carbonate solution (0.5 M) at 4 C under magnetic stirring. Then, cystamine dihydrochloride, previously dissolved in 0.25 mL sodium hydrogen carbonate solution (0.5 M), was added to the solution and mixed for 2–3 min.
Superstrong, superstiff, and conductive alginate hydrogels
This hydrogel can hold sufficient cations (e.g., Li+) within its gel matrix without compromising the mechanical performance and exhibits high ionic conductivity …
Thermoresponsive Gelatin/Chitosan Hydrogel Films for a Degradable Capacitor …
Ingestible electronic devices are tools for exploring the condition of the gastrointestinal tract and adjacent organs without a burden on the patients. Making them safe requires that they be fabricated with harmless materials. In this study, we developed a capacitor using food materials for a wirele …
A new amphoteric superabsorbent hydrogel based on sodium starch sulfate …
A new amphoteric superabsorbent hydrogels were synthesized by graft copolymerization blending based on acrylamide (AM), diallydimethylammonium chloride (DMDAAC) and sodium starch sulfate (SSS). The effect of polymerization conditions on swelling capacity was investigated. The results showed that the …
Recent progress in multifunctional hydrogel-based supercapacitors
Hydrogel-based supercapacitors with excellent mechanical properties can overcome several unsettled challenges that current wearable power supply …
Nanocomposite hydrogel based on sodium alginate, poly (acrylic acid), and tetraamminecopper (II) sulfate …
In this study, a novel nanocomposite hydrogel (NCH) was prepared by in situ crosslinking and radical polymerization of acrylic acid (AA) in the presence of sodium alginate (Na-Alg), followed by loading of Cu<sup>2+</sup> ions and reaction with ammonia. The main advantage of the synthesized NCH is th …
Room-temperature assembled 3D macro-porous Ti3C2Tx/RGO hybrid hydrogel and the application as the self-standing electrode for sodium …
A 3D monolithic Ti 3 C 2 T x /RGO hybrid hydrogel has been fabricated by a room-temperature GO-assisted gelation method with l-cysteine and Na 2 S, which exhibited excellent performances as self-standing anode for …
A Physically Cross-Linked Sodium Alginate–Gelatin Hydrogel with High Mechanical Strength | ACS Applied Polymer Materials
Hydrogels constructed from pure biomacromolecules with multifunctions of good mechanical performances, ionic environmental stability, self-healing, biocompatibility, and ionic conductivity are desirable but remain as a challenge. In this work, hydrogels composed of pure biomacromolecules of gelatin and sodium alginate were constructed …
Short Communication A new amphoteric superabsorbent hydrogel based on sodium starch sulfate …
An amphoteric hydrogel was prepared by the graft copolymerization blending of AM and DMDAAC onto sodium starch sulfate. The resulting hydrogel showed a distinguished swelling capacity (1493.1 g/g in distilled water) and salt-tolerance (91.0 g/g in 0.9 wt% NaCl solution) at experimental conditions compared with original starch-based …
Ultrastretchable and superior healable …
Along with designing wrinkled-structure electrodes, supercapacitors fabricated by using this hydrogel as a gel electrolyte not …
Polysaccharide-based hydrogel electrolytes enriched with poly(norepinephrine) for sustainable aqueous electrochemical capacitors …
Sodium hydroxide (analytical grade) and sodium sulfate anhydrous (≥99.0%) were purchased from POCH (Polish Chemical Reagents). Urea (99.3 +%) was purchased from Alfa Aesar, and agarose from EURx …
Electricity production performance enhancement of microbial fuel cells with double-layer sodium alginate hydrogel …
To understand more clearly the effects of various additives on the structural characteristics of sodium alginate hydrogels, 50% Fe 3 O 4 /EAMs@SA samples were set up, i.e., its Fe 3 O 4 content was half of Fe 3 O 4 /EAMs@SA samples, and 50% PVA@SA samples were set up, i.e., its PVA content was half of PVA@SA, and these sample FT-IR …
Application of supramolecular hydrogel in supercapacitors: …
The heteroatom-rich carbon sheet electrode is combined with a double crosslinked hydrogel electrolyte (aluminum alginate/polyacrylamide/sodium sulfate) to provide energy density …
Polyacrylic acid tethered onto the surface of vinyl functionalized silica nanoparticles for flexible hydrogel electrolytes of sodium …
Pseudocapacitive sodium storage in mesoporous Single-Crystal-like TiO(2)-Graphene nanocomposite enables high-performance sodium-ion capacitors ACS Nano, 11 ( 2017 ), pp. 2952 - 2960, 10.1021/acsnano.6b08332
Self-healing, ultra-stretchable, and highly sensitive conductive hydrogel reinforced by sulfate …
FTIR spectroscopy is performed to determine the main chemical structure and interactions between the components of hydrogels, as shown in Fig. 2 a.Typical characteristic bands of SPE are clearly illustrated, including 3436 cm −1 (O H), 2935 cm −1 (C H), 1634 cm −1 (C=O), 1428 cm −1 (C O), 1257 cm −1 (S=O), and 849 cm −1 (C H …
Hydrogel-Polymer Electrolyte for Electrochemical Capacitors with …
AC/AC (AC=activated carbon) electrochemical capacitors (ECs) were designed with a 1 mol L-1 lithium sulfate hydrogel- polymer electrolyte (HPE) based on carboxymethyl cellulose sodium salt (CMC). The electrochemical performance of the ECs was compared ...
Renewable and soft dynamic supercapacitors based on poly …
In conclusion, we synthesized poly (acrylamide) hydrogel and hydrogel electrolytes via a free radical approach where sodium montmorillonite clay was used as …
Hydrogel–Polymer Electrolyte for Electrochemical …
AC/AC (AC=activated carbon) electrochemical capacitors (ECs) were designed with a 1 mol L −1 lithium sulfate hydrogel– polymer electrolyte (HPE) based on carboxymethyl cellulose sodium salt (CMC).
Recent progress and future prospects of sodium-ion capacitors
To satisfy the requirements for various electric systems and energy storage devices with both high energy density and power density as well as long lifespan, sodium-ion capacitors (SICs) consisting of battery anode and supercapacitor cathode, have attracted much attention due to the abundant resources and low cost of sodium source. …
Hydrogel–Polymer Electrolyte for Electrochemical Capacitors with …
AC/AC (AC=activated carbon) electrochemical capacitors (ECs) were designed with a 1 mol L−1 lithium sulfate hydrogel– polymer electrolyte (HPE) based on carboxymethyl cellulose sodium salt (CMC). The electrochemical performance of the ECs was compared with that of cells composed of common separators such as a polyolefin membrane (Celgard 3501, …
Fabrication of poly(vinyl alcohol) hydrogel beads crosslinked using sodium sulfate for microorganism immobilization …
XRD analysis of PVA–sodium sulfate hydrogel demonstrated that sodium sulfate promotes the formation of crystalline PVA, resulting in the formation of physically crosslinked PVA hydrogel. Sodium sulfate as gelling agent has lower toxicity to …
Hydrogel-polymer electrolytes for electrochemical …
Electrochemical capacitors are electrochemical devices with fast and highly reversible charge-storage and discharge capabilities. The devices are attractive for energy storage particularly in applications involving high …
Ultrastretchable and superior healable supercapacitors based on a double cross-linked hydrogel …
Healable and stretchable energy storage devices are gaining interest for wearable electronics and smart textiles. Here the authors report a nanocomposite hydrogel with high stretchability, ionic ...