A metal-free and flexible supercapacitor based on redox-active lignosulfonate functionalized graphene hydrogels

Li, Fengfeng; Wang, Xiluan; Sun, Run‐Cang

doi:10.1039/c7ta03789a

Cited by 118 publications

(73 citation statements)

References 49 publications

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“…There is no doubt that there are many other types of versatile hydrogels and functional supercapacitors made from those fascinating materials, from which the technology may boost the development of integrated energy storage devices with special functions for different applications . For example, Moon et al reported a biodegradable hydrogel made from NaCl agarose as electrolyte for flexible supercapacitors .…”

Section: Hydrogel Electrolyte For Supercapacitorsmentioning

confidence: 99%

Hydrogel Electrolytes for Flexible Aqueous Energy Storage Devices

Wang

Tang

et al. 2018

Adv Funct Materials

452

339

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Hydrogel materials are receiving increasing research interest due to their intriguing structures that consist of a crosslinked network of polymer chains with interstitial spaces filled with solvent water. This feature endows the materials with the characteristics of being both wet and soft, making them ideal candidates for electrolyte materials for flexible energy storage devices, such as supercapacitors and rechargeable batteries that are under intensive studies nowadays. More importantly, the highly abundant and tunable chemistries of these hydrogels allow the introduction of novel functionalities into the existing hydrogels so that it is possible to fabricate unprecedented energy storage devices with additional functions. Here, the state-of-the-art advances of the hydrogel materials for flexible energy storage devices including supercapacitors and rechargeable batteries are reviewed. In addition, devices with various kinds of functions, such as self-healing, shape memory, and stretchability, are also included to stress the critical role of hydrogel materials. Furthermore, the challenges embedded in the current technologies are also highlighted and discussed with the hope to continually boost future research for the fast-developing field.

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Section: Hydrogel Electrolyte For Supercapacitorsmentioning

confidence: 99%

Hydrogel Electrolytes for Flexible Aqueous Energy Storage Devices

Wang

Tang

et al. 2018

Adv Funct Materials

452

339

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“…Furthermore, instead of conjugated polymers different carbon materials may be added to lignin not only to promote conductivity but also to provide the possibility of synergistic charge storage on carbon surfaces and in catechol groups. Different carbonaceous species, such as graphene, carbon nanotubes, or other high‐surface area carbons have been presented in this regard. Besides providing conductivity, intelligent design of the carbonaceous material may increase stability by preventing dissolution of the active material .…”

Section: Electrodesmentioning

confidence: 99%

Sustainable Battery Materials from Biomass

Liedel

2020

ChemSusChem

120

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Sustainable sources of energy have been identified as a possible way out of today's oil dependency and are being rapidly developed. In contrast, storage of energy to a large extent still relies on heavy metals in batteries. Especially when built from biomass‐derived organics, organic batteries are promising alternatives and pave the way towards truly sustainable energy storage. First described in 2008, research on biomass‐derived electrodes has been taken up by a multitude of researchers worldwide. Nowadays, in principle, electrodes in batteries could be composed of all kinds of carbonized and noncarbonized biomass: On one hand, all kinds of (waste) biomass may be carbonized and used in anodes of lithium‐ or sodium‐ion batteries, cathodes in metal–sulfur or metal–oxygen batteries, or as conductive additives. On the other hand, a plethora of biomolecules, such as quinones, flavins, or carboxylates, contain redox‐active groups that can be used as redox‐active components in electrodes with very little chemical modification. Biomass‐based binders can replace toxic halogenated commercial binders to enable a truly sustainable future of energy storage devices. Besides the electrodes, electrolytes and separators may also be synthesized from biomass. In this Review, recent research progress in this rapidly emerging field is summarized with a focus on potentially fully biowaste‐derived batteries.

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“…Electroactive lignin was also used to assemble lignosulfonate / single‐walled carbon nanotube treated by HNO 3 pressure‐sensitive hydrogels for ECs applications . Lignosulfonate functionalized graphene composites were used to fabricate metal‐free and flexible supercapacitors with comparable performance like the transition meta‐based ECs …”

Section: Preparation and Characterization Of Lignin‐derived Electrochmentioning

confidence: 99%

Lignin‐derived electrochemical energy materials and systems

Jiang

Wang

et al. 2020

Biofuels Bioprod Bioref

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Electrode and electrolyte materials with higher performance, longer life, and lower cost need to be developed, given the substantial growing demand for advanced electrochemical energy systems. Lignin, the second most abundant natural polymer, has been successfully demonstrated to be a viable precursor or feedstock for the preparation of high-performance electrochemical energy materials and components such as electrodes, electrolyte additives, membrane separators, and binders. Moreover, techno-economic analyses indicate that it is possible to prepare cost-effective carbon structures from lignin at engineering scale, in contrast with current carbon products. These facts suggest that the scalable conversion of lignin into high-value energy materials will offer a promising pathway to not only promote the utilization and valorization of lignin but also boost the development of advanced electrochemical energy systems. This review examines cutting-edge renewable energy materials derived from various lignin compounds and Review: Lignin to energy materials X Wu et al.their applications in electrochemical energy systems with an emphasis on supercapacitors, rechargeable batteries, and fuel cells. Meanwhile, this review also aims to carve out the critical barriers for lignin-derived high-performance materials for energy applications, and to identify viable approaches for the synthesis of sustainable new energy materials.

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A metal-free and flexible supercapacitor based on redox-active lignosulfonate functionalized graphene hydrogels

Abstract: A metal-free and flexible supercapacitor was prepared based on redox-active lignosulfonate functionalized graphene hydrogels.

Cited by 118 publications

References 49 publications

Hydrogel Electrolytes for Flexible Aqueous Energy Storage Devices

Hydrogel Electrolytes for Flexible Aqueous Energy Storage Devices

Sustainable Battery Materials from Biomass

Lignin‐derived electrochemical energy materials and systems

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