Ionogel-based, highly stretchable, transparent, durable triboelectric nanogenerators for energy harvesting and motion sensing over a wide temperature range

Sun, Lijie; Chen, Shuo; Guo, Yifan; Song, Jianchun; Zhang, Luzhi; Xiao, Lijuan; Guan, Qingbao; You, Zhengwei

doi:10.1016/j.nanoen.2019.06.043

Cited by 217 publications

(186 citation statements)

References 42 publications

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“…Nevertheless, the stretchability is limited by the fact that the percolated networks of conductive fillers are broken at large strain 21. Alternatively, TENGs with ultrahigh stretchability have been reported by using ionic conductors of hydrogels or ionogels 22–34. Hydrogels are composed of hydrophilic polymer networks swollen with water or ionic aqueous solution, which can be stretchable, biocompatible and transparent 35–37.…”

Section: Introductionmentioning

confidence: 99%

Stretchable, Transparent, and Thermally Stable Triboelectric Nanogenerators Based on Solvent‐Free Ion‐Conducting Elastomer Electrodes

Zhang

Chen

Guo

et al. 2020

Adv Funct Materials

135

118

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The development of stretchable/soft electronics requires power sources that can match their stretchability. In this study, a highly stretchable, transparent, and environmentally stable triboelectric nanogenerator with ionic conductor electrodes (iTENG) is reported. The ion-conducting elastomer (ICE) electrode, together with a dielectric elastomer electrification layer, allows the ICE-iTENG to achieve a stretchability of 1036% and transmittance of 91.5%. Most importantly, the ICE is liquid solvent-free and thermally stable up to 335 °C, avoiding the dehydration-induced performance degradation of commonly used hydrogels. The ICE-iTENG shows no decrease in electrical output even after storing at 100 °C for 15 h. Biomechanical motion energies are demonstrated to be harvested by the ICE-iTENG for powering wearable electronics intermittently without extra power sources. An ICE-iTENGbased pressure sensor is also developed with sensitivity up to 2.87 kPa −1 . The stretchable ICE-iTENG overcomes the strain-induced performance degradation using percolated electrical conductors and liquid evaporationinduced degradation using ion-conducting hydrogels/ionogels, suggesting great promising applications in soft/stretchable electronics under a relatively wider temperature range.

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Section: Introductionmentioning

confidence: 99%

Stretchable, Transparent, and Thermally Stable Triboelectric Nanogenerators Based on Solvent‐Free Ion‐Conducting Elastomer Electrodes

Zhang

Chen

Guo

et al. 2020

Adv Funct Materials

135

118

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show abstract

“…It remains a challenge to establish a new crosslinking strategy that matches the spinning process to efficiently produce transparent crosslinked hydrogel fibers. In addition, hydrogels exhibit two drawbacks: freezing and evaporation of water, leading to dysfunction; thus, they are not suitable for use in dry or subzero environments . Accordingly, organohydrogels have attracted increasing attention because of their excellent antifreezing and solvent retention properties .…”

mentioning

confidence: 99%

Mechanically and Electronically Robust Transparent Organohydrogel Fibers

et al. 2020

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Stretchable conductive fibers are key elements for next‐generation flexible electronics. Most existing conductive fibers are electron‐based, opaque, relatively rigid, and show a significant increase in resistance during stretching. Accordingly, soft, stretchable, and transparent ion‐conductive hydrogel fibers have attracted significant attention. However, hydrogel fibers are difficult to manufacture and easy to dry and freeze, which significantly hinders their wide range of applications. Herein, organohydrogel fibers are designed to address these challenges. First, a newly designed hybrid crosslinking strategy continuously wet‐spins hydrogel fibers, which are transformed into organohydrogel fibers by simple solvent replacement. The organohydrogel fibers show excellent antifreezing (< ‐80 °C) capability, stability (>5 months), transparency, and stretchability. The predominantly covalently crosslinked network ensures the fibers have a high dynamic mechanical stability with negligible hysteresis and creep, from which previous conductive fibers usually suffer. Accordingly, strain sensors made from the organohydrogel fibers accurately capture high‐frequency (4 Hz) and high‐speed (24 cm s−1) motion and exhibit little drift for 1000 stretch–release cycles, and are powerful for detecting rapid cyclic motions such as engine valves and are difficult to reach by previously reported conductive fibers. The organohydrogel fibers also demonstrate potential as wearable anisotropic sensors, data gloves, soft electrodes, and optical fibers.

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“…In addition, ionogel-based TENG was also reported with a wider application temperature range (−20 C~100 C) comparing to that of hydrogelbased. 121 Moreover, cross-linked polyethyleneimide (PEI)/PVA was developed by researchers as positive tribo-materials, and the composite-based TENG shows a much higher output when embedding Au nanoparticles in the polymer matrix, which was due to a 2.4-fold enhancement of dielectric constant of the composite bulk. 122 Due to the highly porous structures and super lightweight, aerogels have been developed in various applications.…”

Section: Methodsmentioning

confidence: 99%

“…The output performance of the TENG was associated with the concentration of silver nanowires as well as the complexation type of metal ions. In addition, ionogel‐based TENG was also reported with a wider application temperature range (−20°C~100°C) comparing to that of hydrogel‐based . Moreover, cross‐linked polyethyleneimide (PEI)/PVA was developed by researchers as positive tribo‐materials, and the composite‐based TENG shows a much higher output when embedding Au nanoparticles in the polymer matrix, which was due to a 2.4‐fold enhancement of dielectric constant of the composite bulk …”

Section: Flexible Tengmentioning

confidence: 99%

Recent progress on flexible nanogenerators toward self‐powered systems

Liu

Wang

Zhao

et al. 2020

InfoMat

107

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The advances in wearable/flexible electronics have triggered tremendous demands for flexible power sources, where flexible nanogenerators, capable of converting mechanical energy into electricity, demonstrate its great potential. Here, recent progress on flexible nanogenerators for mechanical energy harvesting toward self‐powered systems, including flexible piezoelectric and triboelectric nanogenerator, is reviewed. The emphasis is mainly on the basic working principle, the newly developed materials and structural design as well as associated typical applications for energy harvesting, sensing, and self‐powered systems. In addition, the progress of flexible hybrid nanogenerator in terms of its applications is also highlighted. Finally, the challenges and future perspectives toward flexible self‐powered systems are reviewed.

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Ionogel-based, highly stretchable, transparent, durable triboelectric nanogenerators for energy harvesting and motion sensing over a wide temperature range

Cited by 217 publications

References 42 publications

Stretchable, Transparent, and Thermally Stable Triboelectric Nanogenerators Based on Solvent‐Free Ion‐Conducting Elastomer Electrodes

Stretchable, Transparent, and Thermally Stable Triboelectric Nanogenerators Based on Solvent‐Free Ion‐Conducting Elastomer Electrodes

Mechanically and Electronically Robust Transparent Organohydrogel Fibers

Recent progress on flexible nanogenerators toward self‐powered systems

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