Stretchable and Semitransparent Conductive Hybrid Hydrogels for Flexible Supercapacitors

Hao, Guang‐Ping; Hippauf, Felix; Oschatz, Martin; Wisser, Florian M.; Leifert, Annika; Nickel, Winfried; Mohamed-Noriega, Nasser; Zheng, Zhikun; Kaskel, Stefan

doi:10.1021/nn502065u

Cited by 196 publications

(128 citation statements)

References 47 publications

(88 reference statements)

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“…Hao et al [36] reported a highly flexible PANI-containing conductive hydrogel based on preorganized α-cyclodextrins polyacrylamide (α-CD-PAAm) host hydrogels. Firstly, the host α-CD-PAAm hydrogel was prepared through a sol gel process, which contained amphiphilic domains that allowed aniline (ANI) molecules gathering in the nonpolar cavities of α-CD.…”

Section: Conducting Polymer Hydrogel Flexible Electrodes and Supercapmentioning

confidence: 99%

Conducting polymer hydrogel materials for high-performance flexible solid-state supercapacitors

et al. 2016

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Different from solid electrodes, conducting polymer hydrogel electrodes swollen with water and ions, can reach contact with the electrolyte solution at the molecular level, which will result in more efficient electrochemical process of supercapacitors. Besides, the inherent soft nature of hydrogel material offers the electrode superior flexibility, which benefits to gain high flexibility for devices. Here, this perspective briefly introduces the current research progress in the field of conducting polymer hydrogel electrodes-based flexible solid-state supercapacitor and gives an outlook on the future trend of research.Keywords: Conducting polymer hydrogels, flexible supercapacitor, soft electrode, polyaniline, integrated device Nowadays, flexible energy storage devices (batteries and supercapacitors) have received widely attentions as the rapid progress of flexible and wearable electronics [1,2]. Flexible solid-state supercapacitors represent a new type of supercapacitor that can work under consecutive bending, stretching and even twisting states [3][4][5]. However, it remains a large challenge to obtain a flexible solid-state supercapacitor with high electrochemical performance and superior flexibility. The performance of a flexible supercapacitor mainly depends on the properties of electrode materials and the device configuration [6]. The electrode materials of supercapacitor include various nanocarbons, conducting polymers and transition metal oxides [7][8][9][10][11][12]. Conducting polymer electrodes possess several merits, such as high electric conductivity, large capacitance, inherent flexibility and easy to processing [13][14][15][16][17][18]. However, the separations of the molecular chains in conducting polymers are generally small relative to the double layer thickness, which results in low capacitance [19]. Besides, the low ionic mobility in the polymer matrix reduces the maximum power density of such electrodes [20].On the other hand, the current device configuration of the flexible solid-state supercapacitor somewhat hinders the device to gain better performance. Generally, a flexible solid-state supercapacitor consists of a "sandwich" laminated structure, including two flexible solid electrodes and the middle gel polymer electrolyte layer [21]. In terms of this structure, the solid electrode materials hardly make a sufficient contact with the gel polymer electrolyte that possesses large viscosity and poor diffusion, which results in low capacitance and sluggish the electrochemical response.Hydrogel is made up of solid three-dimensional polymeric networks and large amounts of water medium [22]. Generally, the hydrogels are employed as solid-state electrolyte of supercapacitors, such as polyvinyl alcohol (PVA) gel polymer electrolyte. Recently, conducting polymer hydrogels were used as electrode materials for supercapacitors instead of traditional solid electrodes [19,[23][24][25]. This "aqua material electrode" is conducting polymer matrix swollen with water and ions, which hence produce a...

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Section: Conducting Polymer Hydrogel Flexible Electrodes and Supercapmentioning

confidence: 99%

Conducting polymer hydrogel materials for high-performance flexible solid-state supercapacitors

et al. 2016

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“…Among various functional hydrogels 9–11 , conductive hydrogels are very promising as stretchable conductive materials, which have been extensively studied for applications such as stretchable sensors 7,8,12 and supercapacitors 13,14 . Most of the conductive hydrogels are made into two-dimensional films or three-dimensional monoliths by molding methods 15,16 , which result in an amorphous material with polymer chain’s random orientation and disordered alignment.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired ultra-stretchable and anti-freezing conductive hydrogel fibers with ordered and reversible polymer chain alignment

et al. 2018

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High-performance stretchable conductive fibers are desired for the development of stretchable electronic devices. Here we show a simple spinning method to prepare conductive hydrogel fibers with ordered polymer chain alignment that mimics the hierarchically organized structure of spider silk. The as-prepared sodium polyacrylate hydrogel fiber is further coated with a thin layer of polymethyl acrylate to form a core–shell water-resistant MAPAH fiber. Owing to the coexistence and reversible transformation of crystalline and amorphous domains in the fibers, MAPAH fibers exhibit high tensile strength, large stretchability and fast resilience from large strain. MAPAH fiber can serve as a highly stretchable wire with a conductive hydrogel core and an insulating cover. The stretchability and conductivity of the MAPAH fiber are retained at −35 °C, indicating its anti-freezing property. As a prime example of stretchable conductive fibers, MAPAH fibers will shed light on the design of next generation textile-based stretchable electronic devices.

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“…5d, various transparent soft materials were compared in terms of their strength and elasticity [53]. Hydrogels constitute another type of transparent soft films [54][55][56]. However, different from the mechanically tough PDMS, the hydrogels are usually mechanically weak owing to their "wet" components (hygrophilic gel).…”

Section: Resultsmentioning

confidence: 99%

A skin-like stretchable colorimetric temperature sensor

Chen

Yin

et al. 2018

Sci. China Mater.

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Stretchable and Semitransparent Conductive Hybrid Hydrogels for Flexible Supercapacitors

Cited by 196 publications

References 47 publications

Conducting polymer hydrogel materials for high-performance flexible solid-state supercapacitors

Conducting polymer hydrogel materials for high-performance flexible solid-state supercapacitors

Bioinspired ultra-stretchable and anti-freezing conductive hydrogel fibers with ordered and reversible polymer chain alignment

A skin-like stretchable colorimetric temperature sensor

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