Strong conductive hybrid hydrogel electrode based on inorganic hybrid crosslinking

Du, Juan; Zhu, Wenli; Yang, Qiaoling; She, Xiaohong; Wu, Hang; Tsou, Chi‐Hui; Manuel, De Guzman; Huang, Huiping

doi:10.1007/s00396-021-04930-6

Cited by 13 publications

(11 citation statements)

References 49 publications

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“…Additionally, two unique PANI-related bands (2346 cm À1 for the N C O bond and 1294 cm À1 for the C N within the benzenoid ring) were discovered in PAA/PANI/SiO 2 hydrogels, confirming the formation of PANI. 21,38,39 As shown in Figure 2B, there was no obvious difference between XRD patterns of PAA/PANI/SiO 2 and PAA/SiO 2 hydrogels. They had a similar diffraction pattern with a broad peak at 18.4 and a weak peak at about 37.3 , which belonged to amorphous PAA and amorphous SiO 2 , respectively.…”

Section: Electrochemical Characterization Of Paa/pani/sio 2 Hydrogel-...mentioning

confidence: 86%

“…Recently, a series of supercapacitors with high flexibility and stability have been developed using polyvinyl alcohol (PVA), sodium carboxymethylcellulose, polyacrylic acid (PAA), polyacrylamide (PAM), and sodium alginate, etc. as hydrogel matrixes 3,14,18–29 . However, defects such as low mechanical strength due to insufficient crosslinking, poor interfaces between electrodes and electrolytes under mechanical deformation, and potential loss of electrochemical performance during bending or stretching make it difficult to further improve the flexibility and electrochemical performance of these conductive hydrogel based energy storage devices.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a strong bond between the polymer network and nanoparticles is necessary. Nanoparticles prepared by in situ sol–gel technology can considerably increase the compatibility between nanoparticles and polymers to avoid aggregation 19,21,36 . In our earlier work, hybrid hydrogels polyaniline/poly(vinyl alcohol)/TiO 2 (PANI/PVA/TiO 2 ) were prepared by in situ oxidative polymerization of aniline (ANI) and in situ synthesized TiO 2 using the sol–gel method.…”

Section: Introductionmentioning

confidence: 99%

“…Due to hydrogen bonds and electrostatic interactions among PANI, PVA, and TiO 2 , this hybrid crosslinking structure afforded the PANI/PVA/TiO 2 hybrid hydrogel increased tensile/compressive strength (26.5 kPa/8.2 MPa), self‐healing properties, and high conductivity (up to 1.38 S/m). The supercapacitor using the hydrogel as electrodes had a large capacitance of 41.0–127.5 F/g and a high energy density of 0.9–2.8 Wh/kg at a current density of 0.5 A/g 21 …”

Section: Introductionmentioning

confidence: 99%

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Robust conductive nanocomposite hydrogels with an interpenetrating network based on polyaniline for flexible supercapacitors

Du,

Zhu,

She

et al. 2023

Polymer Engineering & Sci

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Conductive polyacrylic acid/polyaniline/SiO2 (PAA/PANI/SiO2) nanocomposite hydrogels as electrolytes for a high‐performance flexible supercapacitor were prepared by combining in situ radical polymerization of anionic monomer acrylic acid, in situ sol–gel reaction of vinyltriethoxysilane (VTES), and oxidative polymerization of conductive monomer aniline (ANI). In the nanocomposite hydrogel, vinyl‐SiO2 nanoparticles served as analogous covalent crosslinkers, while the reversible noncovalent interactions (such as hydrogen bonds, electrostatic interactions, and chain entanglements) between the PAA/SiO2 and PANI networks acted as physical crosslinkers. The interconnected PANI and PAA/SiO2 networks thus constructed an interpenetrating three‐dimensional network that improved the movement of electrons and ions while also enhancing the mechanical properties of the hydrogel. At a volume ratio of ANI to VTES of 50:200, the compressive strength and conductivity of PAA/PANI/SiO2 hydrogels were as high as 1505 kPa and 4.42 S/m, respectively. Moreover, the flexible supercapacitors based on the nanocomposite hydrogel electrolyte exhibited high specific capacitance (574.7 F/g), energy density (19.6 Wh/kg), and power density (1.4 kW/kg) at a current density of 0.05 A/g. Meanwhile, these supercapacitors exhibit exceptional flexibility and mechanical stability, and can be repeatedly bent without degrading performance. This nanocomposite hydrogel has considerable potential for use in other flexible energy devices and electronics due to its excellent mechanical and electrochemical properties.Highlights Conductive nanocomposite hydrogel have good conductivity and mechanical properties. Conductive hydrogels are used as electrolytes for flexible supercapacitors. Vinyl‐SiO2 served as analogous covalent crosslinkers for the hydrogel. Noncovalent bonds between PAA/SiO2 and PANI acted as physical crosslinkers. Interconnected PANI and PAA/SiO2 networks formed an interpenetrating network.

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Section: Electrochemical Characterization Of Paa/pani/sio 2 Hydrogel-...mentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Robust conductive nanocomposite hydrogels with an interpenetrating network based on polyaniline for flexible supercapacitors

Du,

Zhu,

She

et al. 2023

Polymer Engineering & Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…The authors have cited additional references within the Supporting Information (Ref. [9][10][11][63][64][65][66][67][68][69]).…”

Section: Experimental Section Materialsmentioning

confidence: 99%

Highly Flexible and Self‐Healing Supercapacitor Enabled by Physically Crosslinking Polymer Hydrogel Electrolyte

Hua,

Xin,

Lin

et al. 2023

Chemistry A European J

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Preparation of flexible supercapacitors with excellent mechanical properties and self‐healing properties is of great significance but still remains a challenge. A self‐healable conductive hydrogel based on poly N‐hydroxyethyl acrylamide (PHEAA) is fabricated as electrolyte for supercapacitors. The design of the physically cross‐linked dual network, and rich hydrogen bonds endow the hydrogel with robust mechanical properties and strong self‐healing ability. The hydrogel exhibited an excellent stretchability (723%) and a high ionic conductivity (21.8 mS/cm). Specially, by in‐situ growth of electrode film, a non‐laminated supercapacitor is obtained with flexibility and self‐healing ability. Due to the non‐laminated structure, the supercapacitor can work stably under bending and punching. The supercapacitor possessed an areal capacitance of 253.1 mF/cm2 and the capacitance retention was 80% after five cutting‐healing cycles. The pseudo‐capacitance contribution of the supercapacitor after self‐healing was discussed. It is noteworthy that the supercapacitor maintains the ability to power a clock after self‐healing.

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Mechanically Robust and Electrically Conductive Hybrid Hydrogel Electrolyte Enabled by Simultaneous Dual In Situ Sol‐Gel Technique and Free Radical Copolymerization

Du,

Hou,

Zhu

et al. 2024

Macromol. Rapid Commun.

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Mechanically robust and ionically conductive hydrogels poly(acrylamide‐co‐2‐acrylamido‐2‐methylpropanesulfonate‐lithium)/TiO2/SiO2 (P(AM‐co‐AMPSLi)/TiO2/SiO2) with inorganic hybrid crosslinking are fabricated through dual in situ sol‐gel reaction of vinyltriethoxysilane (VTES) and tetrabutyl titanate (TBOT), and in situ radical copolymerization of acrylamide (AM), 2‐acrylamide‐2‐methylpropanesulfonate‐lithium (AMPSLi), and vinyl‐SiO2. Due to the introduction of the sulfonic acid groups and Li+ by the reaction of AMPS with Li2CO3, the conductivity of the ionic hydrogel can reach 0.19 S m−1. Vinyl‐SiO2 and nano‐TiO2 are used in this hybrid hydrogel as both multifunctional hybrid crosslinkers and fillers. The hybrid hydrogels demonstrate high tensile strength (0.11–0.33 MPa) and elongation at break (98–1867%), ultrahigh compression strength (0.28–1.36 MPa), certain fatigue resistance, self‐healing, and self‐adhesive properties, which are due to covalent bonds between TiO2 and SiO2, as well as P(AM‐co‐AMPSLi) chains and SiO2, and noncovalent bonds between TiO2 and P(AM‐co‐AMPSLi) chains, as well as the organic frameworks. Furthermore, the specific capacitance, energy density, and power density of the supercapacitors based on ionic hybrid hydrogel electrolytes are 2.88 F g−1, 0.09 Wh kg−1, and 3.07 kW kg−1 at a current density of 0.05 A g−1, respectively. Consequently, the ionic hybrid hydrogels show great promise as flexible energy storage devices.

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Strong conductive hybrid hydrogel electrode based on inorganic hybrid crosslinking

Cited by 13 publications

References 49 publications

Robust conductive nanocomposite hydrogels with an interpenetrating network based on polyaniline for flexible supercapacitors

Robust conductive nanocomposite hydrogels with an interpenetrating network based on polyaniline for flexible supercapacitors

Highly Flexible and Self‐Healing Supercapacitor Enabled by Physically Crosslinking Polymer Hydrogel Electrolyte

Mechanically Robust and Electrically Conductive Hybrid Hydrogel Electrolyte Enabled by Simultaneous Dual In Situ Sol‐Gel Technique and Free Radical Copolymerization

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