A chemically crosslinked hydrogel electrolyte based all-in-one flexible supercapacitor with superior performance

Lin, Guo; Ma, Weigang; Wang, Yao; Song, Xiang-Zhu; Ma, Jie; Han, Xiaodong; Tao, Xueyu; Guo, Litong; Fan, Hongbing; Liu, Zhangsheng; Zhu, Yabo; Wei, Xian‐Yong

doi:10.1016/j.jallcom.2020.155895

Cited by 79 publications

(38 citation statements)

References 46 publications

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“…The mechanical strength of the hydrogel electrolytes and electrochemical performance of the supercapacitor at different stretching states are displayed in Figure 20a-h. Due to the double network structure, the SA-Zn hydrogel exhibited good mechanical properties and excellent stretchability when elongated to a length of more than 1700% under 0.13 MPa pressure. The excellent stretching flexibility of the SA-Zn hydrogel should be attributed to the dynamic coordination interaction and electrostatic interaction between Zn 2+ ions and molecular chains in the SA-Zn hydrogel, which are relatively weak but still stronger than hydrogen bonds [184]. A super flexible supercapacitor using polymer hydrogel has been synthesized with poly (acrylamide) (PAM) crosslinked by vinyl hybrid silica nanoparticles (VSNPs).…”

Section: Flexible Polymer Hydrogel Electrolytesmentioning

confidence: 99%

“…There are many hosts for polymer which have been explored to build up polymer hydrogel electrolytes. For example, chitosan, sodium alginate, agar, cellulose, starch, poly (ethylene oxide) (PEO), poly (acrylic acid) (PAA), poly (acrylamide), poly (ether ether ketone) (PEEK), and poly (vinyl alcohol) (PVA) [ 140 , 178 , 179 , 180 , 181 , 182 , 183 , 184 , 185 , 186 ].…”

Section: Electrochemical Applications Of Polymer Hydrogelsmentioning

confidence: 99%

“…Due to the double network structure, the SA-Zn hydrogel exhibited good mechanical properties and excellent stretchability when elongated to a length of more than 1700% under 0.13 MPa pressure. The excellent stretching flexibility of the SA-Zn hydrogel should be attributed to the dynamic coordination interaction and electrostatic interaction between Zn 2+ ions and molecular chains in the SA-Zn hydrogel, which are relatively weak but still stronger than hydrogen bonds [ 184 ].…”

Section: Electrochemical Applications Of Polymer Hydrogelsmentioning

confidence: 99%

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Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications

et al. 2020

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In the present review, we focused on the fundamental concepts of hydrogels—classification, the polymers involved, synthesis methods, types of hydrogels, properties, and applications of the hydrogel. Hydrogels can be synthesized from natural polymers, synthetic polymers, polymerizable synthetic monomers, and a combination of natural and synthetic polymers. Synthesis of hydrogels involves physical, chemical, and hybrid bonding. The bonding is formed via different routes, such as solution casting, solution mixing, bulk polymerization, free radical mechanism, radiation method, and interpenetrating network formation. The synthesized hydrogels have significant properties, such as mechanical strength, biocompatibility, biodegradability, swellability, and stimuli sensitivity. These properties are substantial for electrochemical and biomedical applications. Furthermore, this review emphasizes flexible and self-healable hydrogels as electrolytes for energy storage and energy conversion applications. Insufficient adhesiveness (less interfacial interaction) between electrodes and electrolytes and mechanical strength pose serious challenges, such as delamination of the supercapacitors, batteries, and solar cells. Owing to smart and aqueous hydrogels, robust mechanical strength, adhesiveness, stretchability, strain sensitivity, and self-healability are the critical factors that can identify the reliability and robustness of the energy storage and conversion devices. These devices are highly efficient and convenient for smart, light-weight, foldable electronics and modern pollution-free transportation in the current decade.

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Section: Flexible Polymer Hydrogel Electrolytesmentioning

confidence: 99%

Section: Electrochemical Applications Of Polymer Hydrogelsmentioning

confidence: 99%

Section: Electrochemical Applications Of Polymer Hydrogelsmentioning

confidence: 99%

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Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications

et al. 2020

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“…The bulk conductivity (σ) of the prepared doped hydrogels is 76, 48, 36 and 34 mS/cm for PEA, PGGA, κC and CMC, respectively. It is worth noting that the conductivity of these biohydrogels is comparable to those reported for PVA-containing hydrogels; for instance, PVA doped with H 3 PO 4 or H 2 SO 4 (11.6 or 7.1 mS/cm, respectively), [ 41 , 42 ] PVA doped with H 3 PO 4 and 2-mercaptopyridine (22.6 mS/cm), [ 41 ] PVA doped with H 2 SO 4 and indigo carmine or alizarin red S (20.3 or 33.1 mS/cm, respectively), [ 43 ] chemically crosslinked PVA-poly(ethylene glycol) (67.1 mS/cm) [ 44 ] and KCl doped boron cross-linked PVA (38 mS/cm). [ 45 ] Moreover, the ionic conductivity of a 0.1 M NaCl aqueous solution is ~20 mS/cm, a concentration of 1 M NaCl being required to obtain a value comparable to that of doped PEA hydrogel [ 46 ].…”

Section: Resultsmentioning

confidence: 99%

Electrical and Capacitive Response of Hydrogel Solid-Like Electrolytes for Supercapacitors

et al. 2021

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Flexible hydrogels are attracting significant interest as solid-like electrolytes for energy storage devices, especially for supercapacitors, because of their lightweight and anti-deformation features. Here, we present a comparative study of four ionic conductive hydrogels derived from biopolymers and doped with 0.1 M NaCl. More specifically, such hydrogels are constituted by κ-carrageenan (κC), carboxymethyl cellulose (CMC), poly-γ-glutamic acid (PGGA) or a phenylalanine-containing polyesteramide (PEA). After examining the morphology and the swelling ratio of the four hydrogels, which varies between 483% and 2356%, their electrical and capacitive behaviors were examined using electrochemical impedance spectroscopy. Measurements were conducted on devices where a hydrogel film was sandwiched between two identical poly(3,4-ethylenedioxythiophene) electrodes. The bulk conductivity of the prepared doped hydrogels is 76, 48, 36 and 34 mS/cm for PEA, PGGA, κC and CMC, respectively. Overall, the polyesteramide hydrogel exhibits the most adequate properties (i.e., low electrical resistance and high capacitance) to be used as semi-solid electrolyte for supercapacitors, which has been attributed to its distinctive structure based on the homogeneous and abundant distribution of both micro- and nanopores. Indeed, the morphology of the polyestermide hydrogel reduces the hydrogel resistance, enhances the transport of ions, and results in a better interfacial contact between the electrodes and solid electrolyte. The correlation between the supercapacitor performance and the hydrogel porous morphology is presented as an important design feature for the next generation of light and flexible energy storage devices for wearable electronics.

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“…For example, in [17], the researchers used PVA as part of a composite negative electrode of a supercapacitor based on an activated carbon material. In [18], a hydrogel based on PVA, polyethylene glycol, and glutaraldehyde was used as an electrolyte for a supercapacitor. Also, researchers in [19] used polyvinyl alcohol as part of an electrolyte for quasi-solid Zn-MnO 2 batteries.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Influence of used polyvinyl alcohol grade on the electrochromic properties of Ni(OH)2-PVA composite films

Kotok

Кovalenko

2020

EEJET

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A chemically crosslinked hydrogel electrolyte based all-in-one flexible supercapacitor with superior performance

Cited by 79 publications

References 46 publications

Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications

Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications

Electrical and Capacitive Response of Hydrogel Solid-Like Electrolytes for Supercapacitors

Influence of used polyvinyl alcohol grade on the electrochromic properties of Ni(OH)2-PVA composite films

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