Humidity-modulated properties of hydrogel polymer electrolytes for flexible supercapacitors

Anjum, Nasim; Joyal, Nathaniel; Iroegbu, Justice Nkemakolam; Li, Dapeng; Shen, Caiwei

doi:10.1016/j.jpowsour.2021.229962

Cited by 30 publications

(12 citation statements)

References 56 publications

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“…This is however true also in other fields. EIS is also used for the characterization of the electrochemical behavior of energy storage devices and electrode materials for supercapacitors, batteries and fuel cells [25][26][27][28]. As in the case of medical and biological applications, also in these applications the elements to be characterized are modeled by means of multi-element models.…”

Section: Introductionmentioning

confidence: 99%

Portable and Highly Versatile Impedance Meter for Very Low Frequency Measurements

et al. 2021

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Electrical Impedance Spectroscopy (EIS) is a characterization technique that is gaining more and more importance in various fields of research and applications. The frequency range of investigation varies according to the type of application. In some fields (biology, medicine, energy) it is useful to be able to perform measurements at very low frequency values (down to a few mHz or even below). While impedance meters operating at frequencies in the range from a few tens of Hz up to a few MHz can be regarded as quite standard pieces of instrumentation commonly available in many laboratories, instrumentation for measurements at very low frequencies, although commercially available, is less common. The subject of this work is the design, realization and testing of a low frequency impedance measurement platform that has the advantage of being portable, rather inexpensive, and yet highly versatile. In our approach, we exploit a personal computer and a soundboard as a powerful system for digital signal generation and analysis that, with the help of low complexity and low-cost external hardware and a public domain software for the implementation of the core system, allow to tailor the platform for targeting specific applications with minimal effort. As an example, we will demonstrate the application of the system to the investigation of polypyrrole-based supercapacitor structures.

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Section: Introductionmentioning

confidence: 99%

Portable and Highly Versatile Impedance Meter for Very Low Frequency Measurements

et al. 2021

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“…A broad, large peak was observed at around 3360 cm –1 for chewing gum residue which was attributed to OH stretching. [ 48,49 ] This peak was slightly shifted to lower wavenumber (3330 cm –1 ) for the gel, this was presumably due to the formation of intermolecular hydrogen bonding between PVA chains. [ 50 ] The band at 1105 cm −1 is relevant to the stretching vibration of COC of PVA.…”

Section: Resultsmentioning

confidence: 99%

A Chewing Gum Residue‐Based Gel with Superior Mechanical Properties and Self‐Healability for Flexible Wearable Sensor

Zhao

Zeng

et al. 2022

Macromol. Rapid Commun.

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Chewing gum residue is hard to decompose and easy to cause pollution, which is highly desirable to realize recycling. In this paper, a chewing gum gel with enhanced mechanical properties and self‐healing properties is prepared by using polyvinyl alcohol (PVA) as the backbone in chewing gum residue. The hydrogen bond and the borax ester bond are employed to construct reversible interaction to enhance the self‐healing ability. The physical crosslinking is realized by further freeze‐thaw treatment to improve its mechanical properties. The gel demonstrates high elongation at break of 610% and strength of 0.11 MPa, as well as excellent self‐healing performance and recyclable properties. In particular, the gel with a fast signal response is successfully applied as a wearable strain sensor to monitor different types of human motion. The gel as a sensor exhibits self‐healing properties suggesting superior safety and stability, and displays wide linear sensitivity (the gauge factor is 0.417 and 0.170). The gel can be further served to explore temperature changes, implying the application in temperature monitoring. This study develops a novel approach for the recycle and reuse of chewing gum residue. The obtained gel may be a promising candidate for the fabrication of flexible wearable sensor.

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“…A GPE prepared by a water plasticizer is specifically called a hydrogel polymer electrolyte. This type of water containing PEs, which is low‐cost and environmentally friendly, has a three‐dimensional polymeric network to trap water inside, mainly by surface tension 106‐109 . Among GPEs, PVA‐based hydrogels have so far been the most widely studied polymer matrix for SSCs applications.…”

Section: Electrolyte Materialsmentioning

confidence: 99%

Recent advances in solid‐state supercapacitors: From emerging materials to advanced applications

Akin

Zhou

2022

Intl J of Energy Research

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Humidity-modulated properties of hydrogel polymer electrolytes for flexible supercapacitors

Cited by 30 publications

References 56 publications

Portable and Highly Versatile Impedance Meter for Very Low Frequency Measurements

Portable and Highly Versatile Impedance Meter for Very Low Frequency Measurements

A Chewing Gum Residue‐Based Gel with Superior Mechanical Properties and Self‐Healability for Flexible Wearable Sensor

Recent advances in solid‐state supercapacitors: From emerging materials to advanced applications

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