A self-healing hydrogel electrolyte for flexible solid-state supercapacitors

Zhao, Jing; Gong, Junhua; Wang, Guiling; Zhu, Kai; Yan, Jun

doi:10.1016/j.cej.2020.125456

Cited by 94 publications

(28 citation statements)

References 49 publications

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“…In addition, the gel‐based electrolyte is preferred for use as separators because of the characteristic cold‐tolerant properties, the fast charge‐carrier transport, better tolerance to volumetric expansion‐contraction, 18 and self‐healing, 19,20 which are desirable properties for use in wearables 21 . For this, several methods are considered such as the direct ink writing of electrodes on gel‐electrolyte 15 that results in samples with minimal damage after repeated stretching, bending, and squeezing 22 …”

Section: Introductionmentioning

confidence: 99%

“…21 For this, several methods are considered such as the direct ink writing of electrodes on gel-electrolyte 15 that results in samples with minimal damage after repeated stretching, bending, and squeezing. 22 Of particular interest is the work developed by Chen et al, 23 which describes a simple procedure for the production of polypyrrole hydrogel with outstanding electrical conductivity and high stretchability. As reported by the authors, the critical process for the production of a highly conductive hydrogel regards the charge-charge interaction in a supramolecular crosslinker system composed of cationic species (conducting polymer chains) and negatively charged surface of micelles of sodium dodecyl sulfate (SDS).…”

Section: Introductionmentioning

confidence: 99%

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All‐gel‐state supercapacitors of polypyrrole reinforced with graphene nanoplatelets

Lima

2021

J of Applied Polymer Sci

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The development of supramolecular structures (conducting hydrogels) obtained from the charge–charge interaction of sodium dodecyl sulfate micelles and oppositely charged polypyrrole chains represents an important step to obtain self‐supported and flexible electrodes for supercapacitors. Herein, the energy density of polypyrrole hydrogel‐based supercapacitors is enhanced by the incorporation of graphene nanoplatelets that introduced the electrical double capacitance contribution to the overall response. The electrochemical performance of synthesized electrodes was optimized from the relative variation in the concentration of supramolecular arrangements (micelles of sodium dodecyl sulfate), pyrrole, and graphene nanoplatelets. As result, higher capacitive retention is observed for modified electrodes (with the incorporation of graphene) – in order of 90% after 1000 cycles of use, preserving the high conductivity and intrinsic mechanical properties (flexibility and stretchability) reaching an areal capacitance of 210.7 mFcm−2.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

All‐gel‐state supercapacitors of polypyrrole reinforced with graphene nanoplatelets

Lima

2021

J of Applied Polymer Sci

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“…The results demonstrate the better self-healed electrochemical performance of SPMA-ZHS than other reported self-healing hydrogel supercapacitors. [53,54,[68][69][70][71][72]…”

Section: Self-healing Performancesmentioning

confidence: 99%

A Powder Self‐Healable Hydrogel Electrolyte for Flexible Hybrid Supercapacitors with High Energy Density and Sustainability

Huang

Han

et al. 2021

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detection, [9-15] disease diagnosis, [16-22] soft robotics, [23-27] and artificial intelligence devices. [28-30] With the development of flexible electronic devices, the exploitation of supporting flexible energy storage devices became an urgent requirement. Among different kinds of flexible energy storage devices, hydrogel electrolyte-based supercapacitors display excellent electrochemical performance and have received significant interest due to the good flexibility, conductivity and stability of hydrogel electrolyte. [31-36] However, due to the lack of effective recycling methods, a large number of ineffective flexible hydrogel electrolyte supercapacitors caused by some irreversible mechanical damages, collapse damages, and dryness of hydrogel electrolyte are abandoned, which would induce heavy economic and environmental protection problems. Hence, developing a recyclable flexible hydrogel electrolyte is necessary to meet the sustainability strategy. Self-healing is an effective strategy to overcome the mechanical damage to prolong the service life. Based on the dynamic interactions, the self-healing hydrogel electrolyte can effectively restore the structure after suffering mechanical damage and recover its good electrochemical performance. [37-43] For example, Chen et al. [44] developed a hydrogel electrolyte by double linkers of Laponite (synthetic hectorite-type clay) and graphene oxide with good stretchability, ionic conductivity, and self-healing ability. The supercapacitor assembled by this hydrogel electrolyte demonstrated good electrochemical performance and excellent self-healing ability under the treatments of both infrared light irradiation and heating. Although self-healing could helpfully protect the hydrogel electrolyte from mechanical damage, the hydrogel electrolyte-based supercapacitor still would not work when suffered from collapse damages or dryness of hydrogel electrolyte. In this case, the recyclability of hydrogel electrolyte-based supercapacitors cannot be guaranteed. Pan et al. [45] prepared a multifunctional hydrogel electrolyte with vinylimidazole and hydroxypropyl acrylate. Based on the excellent self-healing and swelling properties of hydrogel electrolyte, the assembled supercapacitor exhibited good electrochemical performance Ionic conductive hydrogel electrolyte is considered to be an ideal electrolyte candidate for flexible supercapacitor due to its flexibility and high conductivity. However, due to the lack of effective recycling methods, a large number of ineffective flexible hydrogel supercapacitors caused by some irreversible damages and dryness of hydrogel electrolyte are abandoned, which would induce heavy economic and environmental protection problems. Herein,a smart ionic conductive hydrogel (SPMA-Zn: ZnSO 4 /sodium alginate/polymethylacrylic acid) is developed for flexible hybrid supercapacitor (SPMA-ZHS). The SPMA-Zn exhibits an excellent self-healing ability and can recover its electrochemical performance after multiple mechanical damages. More importantly, it possess...

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“…It also showed an energy density of 19.33 Wh/kg at a power density of 0.67 kW/kg and 85% capacitance retention after seven cutting and self‐healing cycles. Zhao et al (2020) have reported fabrication of poly acrylic acid‐ethylene glycol‐KOH gel electrolyte with activated carbon as electrodes and titanium plates as current collector for self‐healing supercapacitor. The developed assembly exhibited an energy density of 21.3 Wh/kg at a power density of 350 W/kg and 68% capacitance retention after 40 breaking/healing cycles.…”

Section: Current Collector Materials For Multifarious Supercapacitorsmentioning

confidence: 99%

Recent progress on novel current collector electrodes for energy storage devices: Supercapacitors

Kumar

Pradhan

Jena

2021

WIREs Energy & Environment

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Current collectors play a very crucial role in the performance of an energy storage device. Regarding supercapacitors, material design, processing, and current collectors' surface properties can result in substantial variation in energy density, power output, cyclic charge–discharge behavior, and other key performance parameters. Most of the reviews in supercapacitor materials and devices focus on the synthesis, characterization, and electrochemical properties of electrode materials. In the present report, the recent advances in supercapacitor electrodes in conjunction with current collector materials and design are summarized in light of various supercapacitor devices categorized concerning their applications and working mechanisms. It includes the literature documented on multifarious supercapacitors, that is, flow supercapacitors, alternating current line filtering supercapacitors, redox electrolyte‐enhanced supercapacitor, metal ion hybrid supercapacitors, microsupercapacitors, electrochromic supercapacitors, and self‐healing supercapacitors. To the best of authors' knowledge, this is a new and recent summarized report on the development of current collector materials based on intended applications and the working principles of supercapacitors. This article is categorized under: Energy and Development > Science and Materials Energy Research & Innovation > Science and Materials Energy Systems Analysis > Science and Materials

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A self-healing hydrogel electrolyte for flexible solid-state supercapacitors

Cited by 94 publications

References 49 publications

All‐gel‐state supercapacitors of polypyrrole reinforced with graphene nanoplatelets

All‐gel‐state supercapacitors of polypyrrole reinforced with graphene nanoplatelets

A Powder Self‐Healable Hydrogel Electrolyte for Flexible Hybrid Supercapacitors with High Energy Density and Sustainability

Recent progress on novel current collector electrodes for energy storage devices: Supercapacitors

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