A supramolecular hydrogel electrolyte for high-performance supercapacitors

Li, Guoqiang; Zhang, Xiangchen; Sang, Min; Wang, Xuan; Zuo, Dunwen; Xu, Jing; Zhang, Hongwei

doi:10.1016/j.est.2020.101931

Cited by 34 publications

(27 citation statements)

References 35 publications

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“…The study also showed that increasing NaCl concentrations lowered gel formation time [165] . A large OPW of SCs is highly desirable, meaning higher specific energy [85] . To achieve this goal, a gel electrolyte was formed using PVA, glycerol, CH 3 COONa, along with K 3 [Fe(CN) 6 ] (Figure 9B).…”

Section: Synthetic Approach Of Supramolecular Systems In Scmentioning

confidence: 98%

“…In a two‐electrode SC system, opposite charges are stored in two electrodes, which accumulate voltage in the system, leading to an increase in the capacitance. The most studied and the simplest EDLC so far is the one that involves similar electrodes made of the same active carbon material with similar weight, i. e., symmetric SCs [49,79,85,88,89] . It is worth noting that an asymmetric SC (ASC) system associated with EDLC‐based charge storage mechanism is also possible and usually constructed with two electrodes comprising different EDLC materials, such as carbonaceous materials with different functional groups or same materials of dissimilar electrode loadings [90,91] …”

Section: Working Principle Of Supercapacitorsmentioning

confidence: 99%

“…The GCD curves for this MSM system are shown in Figure 9B. The solvothermal method was used to form the gel electrolyte through hydrogen bonding and electrostatic interaction between charged species [85] . Lian and Li et al [166] .…”

Section: Synthetic Approach Of Supramolecular Systems In Scmentioning

confidence: 99%

“…[165] A large OPW of SCs is highly desirable, meaning higher specific energy. [85] To achieve this goal, a gel electrolyte was formed using PVA, glycerol, CH 3 COONa, along with K 3 [Fe(CN) 6 ] (Figure 9B). Introduction of the redox-active [Fe(CN) 6 ] 3À /4À species allowed for a large OPW of 2.0 V for the SSC.…”

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

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Recent Advances in Carbon and Metal Based Supramolecular Technology for Supercapacitor Applications

Hasan

Islam

Shah

et al. 2022

The Chemical Record

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As the world moves towards renewable and sustainable energy sources, the need for systems that can quickly and safely store this energy is also rising. Supercapacitors (SCs) are among the most promising alternatives to conventional lithium‐ion batteries. SCs are more stable, have higher‐power densities, and can be charged much faster. However, SCs have their issues, and three of the main drawbacks of current SCs are 1) lower energy densities, 2) high cost of production, and 3) safety concerns in wearable devices. In this review, we discuss recent progress made in supramolecule‐based SCs (SSCs). In supramolecular systems, molecules are held stable using non‐covalent‐type bonds. This allows for a flexible system in which the molecular interaction sites can easily break and reform at low energy, allowing for exposure of highly active sites and self‐healing. When heterometal atoms are introduced into these supramolecular systems, this allows for further activation of the metal sites through the metal‐metal interaction along with the metal‐ligand interactions. This review discusses different types of SSCs (carbon‐based and metal‐incorporated) that have been utilized in recent years depending on their synthesis process. The working principle of SSCs and the utilization of different supramolecular elements that enhance the performance of SCs have also been discussed.

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Section: Synthetic Approach Of Supramolecular Systems In Scmentioning

confidence: 98%

Section: Working Principle Of Supercapacitorsmentioning

confidence: 99%

Section: Synthetic Approach Of Supramolecular Systems In Scmentioning

confidence: 99%

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

See 2 more Smart Citations

Recent Advances in Carbon and Metal Based Supramolecular Technology for Supercapacitor Applications

Hasan

Islam

Shah

et al. 2022

The Chemical Record

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“…While they have good mechanical properties and are very suited to flexible devices, the solid electrolytes typically show low ionic conductivity and overall performance. Gel polymer electrolytes (GE) are a great compromise between Molecules 2021, 26, 2631 2 of 12 the liquid and solid, have relatively good mechanical properties, are lightweight, can be packaged easily, and can have higher ionic conductivity than the solids [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Nano Carbon Doped Polyacrylamide Gel Electrolytes for High Performance Supercapacitors

et al. 2021

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Novel polyacrylamide gel electrolytes (PGEs) doped with nano carbons with enhanced electrochemical, thermal, and mechanical properties are presented. Carboxylated carbon nanotubes (fCNTs), graphene oxide sheets (GO), and the hybrid of fCNT/GO were embedded in the PGEs to serve as supercapacitor (SC) electrolytes. Thermal stability of the unmodified PGE increased with the addition of the nano carbons which led to lower capacitance degradation and longer cycling life of the SCs. The fCNT/GO-PGE showed the best thermal stability, which was 50% higher than original PGE. Viscoelastic properties of PGEs were also improved with the incorporation of GO and fCNT/GO. Oxygen-containing functional groups in GO and fCNT/GO hydrogen bonded with the polymer chains and improved the elasticity of PGEs. The fCNT-PGE demonstrated a slightly lower viscous strain uninform distribution of CNTs in the polymer matrix and the defects formed within. Furthermore, ion diffusion between GO layers was enhanced in fCNT/GO-PGE because fCNT decreased the aggregation of GO sheets and improved the ion channels, increasing the gel ionic conductivity from 41 to 132 mS cm−1. Finally, MnO2-based supercapacitors using PGE, fCNT-PGE, GO-PGE, and fCNT/GO-PGE electrolytes were fabricated with the electrode-specific capacitance measured to be 39.5, 65.5, 77.6, and 83.3 F·g−1, respectively. This research demonstrates the effectiveness of nano carbons as dopants in polymer gel electrolytes for property enhancements.

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Flexible Polymer Hydrogels for Wearable Energy Storage Applications

Mahdavian,

Allahbakhsh,

Bahramian

et al. 2023

Adv Materials Technologies

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The recent and fast‐growing trends related to the development of wearable technologies have raised the need for efficient and high‐performance energy storage devices having extra features such as flexibility and lightweight. Polymer hydrogels, as viscoelastic lightweight porous nanostructures with tunable surface and structural properties, can play a crucial role in the design of these future energy storage devices. Herein, recent developments and progress in the use of polymer hydrogels to design flexible and wearable energy storage devices are presented and discussed. The 3D structure of polymer hydrogels and porous nanostructures based on these hydrogels provides a platform to design flexible supercapacitors, batteries, and personal thermal management devices. Herein, different types of polymer hydrogels are presented, and their main fabrication techniques are reported. Moreover, the main structural properties affecting the energy storage performance of polymer hydrogels are discussed. In addition to recent progress in the design of polymer‐hydrogel‐based wearable devices, recent developments in polymer hydrogels for flexible applications (batteries, supercapacitors, and thermal energy storage systems) are reviewed in detail.

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A supramolecular hydrogel electrolyte for high-performance supercapacitors

Cited by 34 publications

References 35 publications

Recent Advances in Carbon and Metal Based Supramolecular Technology for Supercapacitor Applications

Recent Advances in Carbon and Metal Based Supramolecular Technology for Supercapacitor Applications

Nano Carbon Doped Polyacrylamide Gel Electrolytes for High Performance Supercapacitors

Flexible Polymer Hydrogels for Wearable Energy Storage Applications

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