Self-discharge study of lignin/graphite hybrid material electrodes

Liu, Lianlian; Solin, Niclas; Inganäs, Olle

doi:10.1016/j.electacta.2021.137836

Cited by 16 publications

(9 citation statements)

References 26 publications

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“…Because these electrodes exhibited a high self-discharge rate, resulting in losses of both energy density and power density, it was critical to explore the self-discharge process. Therefore, in a subsequent study, Liu et al employed self-discharge measurements and models to better understand the mechanism of the self-discharging of the lignosulfonate/graphene electrodes, concluding that it occurred through a combination of activation control and diffusion control, depending on the charging potential [ 37 ].…”

Section: Fundamentals Of Ligninmentioning

confidence: 99%

Lignin-Derived Quinone Redox Moieties for Bio-Based Supercapacitors

et al. 2022

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Because of their rapid charging and discharging, high power densities, and excellent cycling life stabilities, supercapacitors have great potential for use in electric vehicles, portable electronics, and for grid frequency modulation. The growing need for supercapacitors that are both efficient and ecologically friendly has generated curiosity in developing sustainable biomass-based electrode materials and electrolytes. Lignin, an aromatic polymer with remarkable electroactive redox characteristics and a large number of active functional groups, is one such candidate for use in renewable supercapacitors. Because its chemical structure features an abundance of quinone groups, lignin undergoes various surface redox processes, storing and releasing both electrons and protons. Accordingly, lignin and its derivatives have been tested as electroactive materials in supercapacitors. This review discusses recent examples of supercapacitors incorporating electrode materials and electrolytes derived from lignin, focusing on the pseudocapacitance provided by the quinone moieties, with the goal of encouraging the use of lignin as a raw material for high-value applications. Employing lignin and its derivatives as active materials in supercapacitor electrodes and as a redox additive in electrolytes has the potential to minimize environmental pollution and energy scarcity while also providing economic benefits.

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Section: Fundamentals Of Ligninmentioning

confidence: 99%

Lignin-Derived Quinone Redox Moieties for Bio-Based Supercapacitors

et al. 2022

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] In addition to improving the energy density of supercapacitors, reducing the self-discharge is also an imperative research task for practical applications of supercapacitors. [21][22][23][24][25][26][27][28][29][30][31][32][33][34] Increasing the working voltages of supercapacitors can effectively improve their energy densities, while electrolytes play a critical role in setting the limit of working voltage. Traditional organic electrolytes for supercapacitors such as tetraethylammonium tetrafluoroborate (TEABF 4 ) in acetonitrile have a working voltage of about 2.7 V. Further increasing the working voltage may lead electrolyte decomposition and hence serious self-discharge due to impurities generated by the side reactions of the charging process at high voltage.…”

Section: Introductionmentioning

confidence: 99%

“…Supercapacitors as energy storage devices have attracted great attention due to their high power density and long cycle life [1–20] . In addition to improving the energy density of supercapacitors, reducing the self‐discharge is also an imperative research task for practical applications of supercapacitors [21–34] . Increasing the working voltages of supercapacitors can effectively improve their energy densities, while electrolytes play a critical role in setting the limit of working voltage.…”

Section: Introductionmentioning

confidence: 99%

Fluorinated Ether‐Based Electrolyte for Supercapacitors with Increased Working Voltage and Suppressed Self‐discharge

Yao

Shi

et al. 2022

ChemElectroChem

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The application of supercapacitors for long-term energy storage is largely limited by their low energy density and self-discharge behavior. Finding a way to effectively increase the voltage window (and thus the energy density) and suppress the selfdischarge of supercapacitors is a huge research challenge. Herein, by introducing a fluorinated ether, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE), in triethyl ammonium tetrafluoroborate/acetonitrile solution as the electrolyte of supercapacitors, improved electrolyte stability could be achieved. As a result, a working voltage of 3.6 V was obtained, much higher than the typical working voltage of 2.7 V for acetonitrile-based electrolytes without TTE. In addition, reduced self-discharge was attained after adding TTE in the electrolyte. When charged to 3.6 V, the supercapacitors using TTE-based electrolyte exhibited an open circuit voltage (OCV) decay of 2.03 V after 24 h, lower than that of the supercapacitors without TTE (2.60 V). Mechanistic analysis indicated that the slower self-discharge could be attributed to the suppressed activation-controlled faradaic reaction process caused by electrolyte decomposition.

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“…25 Thus, XG is able to form transparent solutions with high viscosity, even under different pH and temperatures, becoming a promising material for the development of polymeric electrolytes for applications in electrochemical devices. 26 Aiming to improve the electrochemical performance of biopolymeric matrices, several studies describe the use of carbonaceous materials such as graphene, 27,28 graphite, 29 carbon nanotubes 30,31 and graphene oxide 32,33 as nanofillers. Among them, we can highlight the use of graphite, which is known to be the most abundant and low-cost mineral that has been continuously used as a source for obtaining graphene, one of the great discoveries of the 21st century.…”

Section: Introductionmentioning

confidence: 99%

“…Aiming to improve the electrochemical performance of biopolymeric matrices, several studies describe the use of carbonaceous materials such as graphene, 27,28 graphite, 29 carbon nanotubes 30,31 and graphene oxide 32,33 as nanofillers. Among them, we can highlight the use of graphite, which is known to be the most abundant and low‐cost mineral that has been continuously used as a source for obtaining graphene, one of the great discoveries of the 21st century.…”

Section: Introductionmentioning

confidence: 99%

Development of xanthan gum‐based solid polymer electrolytes with addition of expanded graphite nanosheets

Knuth

knuth

Maron

et al. 2022

J of Applied Polymer Sci

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A composite based on natural polymer xanthan gum (XG) and expanded graphite nanosheets (GNs) was prepared for application as a flexible and ecofriendly solid polymer electrolyte (SPE). To evaluate the ionic conductivity, electrochemical impedance spectroscopy was performed at different temperatures, ranging from 25 to 80 C, reaching high values of 1.1 Â 10 À3 and 2.43 Â 10 À3 S cm À1 at room temperature and 40 C, respectively, for the sample containing 0.5% by weight of GNs. Additional characterizations including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet-visible spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and cyclic voltammetry were implemented to get full structural, morphological and optical relevant features of these samples. The results showed that flexible SPEs based on XG/GNs are very promising and can be used as electrolytes with high potential of application in a wide variety of electrochemical devices.

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Self-discharge study of lignin/graphite hybrid material electrodes

Cited by 16 publications

References 26 publications

Lignin-Derived Quinone Redox Moieties for Bio-Based Supercapacitors

Lignin-Derived Quinone Redox Moieties for Bio-Based Supercapacitors

Fluorinated Ether‐Based Electrolyte for Supercapacitors with Increased Working Voltage and Suppressed Self‐discharge

Development of xanthan gum‐based solid polymer electrolytes with addition of expanded graphite nanosheets

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