Environment-resisted flexible high performance triboelectric nanogenerators based on ultrafast self-healing non-drying conductive organohydrogel

Huang, Long; Dai, Xingyi; Sun, Zhenhua; Wong, Man‐Chung; Pang, Sin-Yi; Han, Jiancheng; Zheng, Qiuqun; Zhao, Cheng; Kong, Jie; Hao, Jian

doi:10.1016/j.nanoen.2020.105724

Cited by 103 publications

(75 citation statements)

References 37 publications

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“…S12). This result is associated with the much larger inherent impedance of TENG at the scale of MΩ, and thus the decrease in conductivity of the SPOH is acceptable and has little negative influence on the output performance of the O-TENG [53,54]. In addition, the resistance dependence of output per-formance of the O-TENG was further investigated.…”

Section: Resultsmentioning

confidence: 99%

Transparent, stretchable and anti-freezing hybrid double-network organohydrogels

Zhu

Song

et al. 2022

Sci. China Mater.

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Stretchable ionic conductors with high transparency and excellent resilience are highly desired for flexible electronics, but traditional ionic conductive hydrogels are easy to dry and freeze. Herein, a newly hybrid crosslinking strategy is presented for preparing a stretchable and transparent hydrogel by using sodium alginate (SA) and acrylamide based on the unique physically and covalently hybrid crosslinking mechanism, which is transformed into organohydrogel by simple solvent replacement. Due to the combination of hybrid crosslinking double network and hydrogen bond interactions introduced by the glycerin-water binary solvent, the SA-poly (acrylamide)-organohydrogel (SPOH) demonstrates excellent anti-freezing (−20°C) property, stability (>2 days), transparency, stretchability (~1600%) and high ionic conductivity (17.1 mS cm −1 ). Thus, a triboelectric nanogenerator made from SPOH (O-TENG) shows an instantaneous peak power density of 262 mW m −2 at a load resistance of 10 MΩ and efficiently harvests biomechanical energy to drive an electronic watch and light-emitting diode. Moreover, The O-TENG exhibits favorable long-term stability (2 weeks) and temperature tolerance (−20°C). In addition, the raw materials can be prepared into SPOH fibers by a simple tubular mold method, exhibiting high transparency, which can be used for laser transmission. The various abilities of the SPOH promise the application of energy harvesting and laser transmission for wearable electronics and biomedical field.

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Section: Resultsmentioning

confidence: 99%

Transparent, stretchable and anti-freezing hybrid double-network organohydrogels

Zhu

Song

et al. 2022

Sci. China Mater.

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“…However, conventional hydrogels are vulnerable to be frozen at subzero temperatures and dehydrated at ambient conditions, resulting in deterioration of flexibility and conductivity. [ 41,42 ] In this work, glycerol and LiCl were introduced to endow the hydrogels with excellent low‐temperature tolerance and anti‐drying ability. Differential scanning calorimetry (DSC) measurement was first utilized to analyze the freezing resistance of the organohydrogel.…”

Section: Resultsmentioning

confidence: 99%

Nucleotide‐Tackified Organohydrogel Electrolyte for Environmentally Self‐Adaptive Flexible Supercapacitor with Robust Electrolyte/Electrode Interface

Zhang

Hou

Liu

et al. 2021

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Hydrogel electrolytes have attracted enormous attention in flexible and safe supercapacitors. However, the interfacial contact problem between hydrogel electrolyte and electrodes, and the environmental instability are the key factors restricting the development of hydrogel‐based supercapacitors. Here, a nucleotide‐tackified adhesive organohydrogel electrolyte is successfully constructed and exhibits freezing resistance and water‐holding ability based on the water/glycerol binary solvent system. Adenosine monophosphate enables the organohydrogels to possess outstanding adhesion and mechanical robustness. The robust adhesion can ensure close contact between the organohydrogel electrolyte and electrodes for constructing an all‐in‐one supercapacitor with low interfacial contact resistance. Impressively, the integrated organohydrogel‐based supercapacitors display an areal specific capacitance of 163.6 mF cm−2. Besides, the supercapacitors feature prominent environmental stability with capacitance retention of 90.6% after 5000 charging/discharging cycles at −20 °C. Furthermore, based on the strong interfacial adhesion, the supercapacitors present excellent electrochemical stability without delamination/displacement between electrolyte and electrodes even under severe deformations such as bending and twisting. It is anticipated that this work will provide an encouraging way for developing flexible energy storage devices with electrochemical stability and environmental adaptability.

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“… 66 Furthermore, hydrogel‐based TENGs can be readily attached to specific body parts to evaluate their ability to sense and harvest motion energy. For instance, Huang et al 70 attached the single‐electrode PAM‐clay hydrogel‐based TENG underneath shoes to sense human walker/running at different temperatures. Interestingly, running achieved better output voltage (35 V) than walking (26 V), probably explained by the higher force applied to the TENG during running, thus translating into a larger contact area.…”

Section: Proposed Applicationsmentioning

confidence: 99%

Hydrogel‐based triboelectric nanogenerators: Properties, performance, and applications

Torres

Troncoso

De-la-Torre

2021

Intl J of Energy Research

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Summary The development of triboelectric nanogenerators (TENGs) in 2012 revolutionized the vision of environmental energy harvesting. Nowadays, TENG assembly, working mode, and material selection are investigated continuously in order to obtain high‐performance and long‐lasting devices. Hydrogels are flexible and stretchable water‐swollen 3D polymer networks, which can be tailored to conduct electricity and render outstanding mechanical properties. Hydrogels have been used to develop novel flexible wearable TENGs. Here, we review the current knowledge concerning hydrogel‐based TENGs, including an overview of relevant hydrogel characteristics, hydrogel‐based TENG performance, and their practical applications. The single‐electrode TENG working mode is the most popular in hydrogel‐based TENGs as they can be easily attached and stretched for biomechanical energy harvesting. Hydrogel‐based TENGs have demonstrated to be capable of delivering high electrical output (250‐400 V, ≥10 μA) and being robust enough for devices that last for several months. Biomechanical energy sensing and harvesting, smart farming, biomedical, and human–machine control interfaces are investigated as potential applications of hydrogel‐based TENGs. Interestingly, energy harvesting from human motion is of particular interest for this type of TENG due to its outstanding stretchability, strength, and additional physical properties, such as self‐healing ability. In most cases, the devices are capable of powering small electronics entirely from harvested biomechanical energy. Biomedical applications involved wound healing acceleration driven by TENG‐powered electrical stimuli and disease monitoring, including implantable devices. Despite showing promising electrical performance, controlling water evaporation is still challenging to maintain the mechanical and conductive properties of hydrogel‐based TENGs. On the other hand, fully biodegradable TENGs are largely unexplored, as well as many applications, such as blue energy harvesting, the internet of things, and others. The next steps in this line of research must focus on addressing the main challenges of hydrogel‐based TENGs and filling the application knowledge gaps.

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Environment-resisted flexible high performance triboelectric nanogenerators based on ultrafast self-healing non-drying conductive organohydrogel

Cited by 103 publications

References 37 publications

Transparent, stretchable and anti-freezing hybrid double-network organohydrogels

Transparent, stretchable and anti-freezing hybrid double-network organohydrogels

Nucleotide‐Tackified Organohydrogel Electrolyte for Environmentally Self‐Adaptive Flexible Supercapacitor with Robust Electrolyte/Electrode Interface

Hydrogel‐based triboelectric nanogenerators: Properties, performance, and applications

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