Preparation of electric double layer capacitors (EDLCs) from two types of electrospun lignin fibers

You, Xiangyu; Duan, Junlei; Koda, Keiichi; Yamada, Takatoshi; Uraki, Yasumitsu

doi:10.1515/hf-2015-0175

Cited by 26 publications

(14 citation statements)

References 33 publications

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“…Electro-spinning is a cost-effective method to produce nano-fibre preforms that can subsequently be carbonised 41 – 44 . The applications of carbonised lignin fibres include nano-composites 45 , tissue scaffolds for biomedical applications 46 , sensors 47 , filtration technologies 21 , lithium ion batteries 48 , sodium ion batteries 49 , fuels cells 50 , double layer capacitors 51 and dye-sensitized solar cells for energy storage and battery-related applications 52 .…”

Section: Introductionmentioning

confidence: 99%

Improved procedure for electro-spinning and carbonisation of neat solvent-fractionated softwood Kraft lignin

Khan

Hararak

Fernando

2021

Sci Rep

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In general, the electro-spinning of lignin requires it to be functionalised and/or blended with synthetic or natural polymers. This paper reports on the use of solvent fractionated lignin-lignin blend to electro-spin BioChoice softwood Kraft lignin. The blend consisted of acetone-soluble and ethanol-soluble lignin in a binary solvent of acetone and DMSO. Solvent fractionation was used to purify lignin where the ash content was reduced in the soluble lignin fractions from 1.24 to ~ 0.1%. The corresponding value after conventional acid-washing in sulphuric acid was 0.34%. A custom-made electro-spinning apparatus was used to produce the nano-fibres. Heat treatment procedures were developed for drying the electro-spun fibres prior to oxidation and carbonisation; this was done to prevent fibre fusion. The lignin fibres were oxidised at 250 °C, carbonised at 1000 °C, 1200 °C and 1500 °C. The cross-section of the fibres was circular and they were observed to be void-free. The longitudinal sections showed that the fibres were not fused. Thus, this procedure demonstrated that solvent fractionated lignin can be electro-spun without using plasticisers or polymer blends using common laboratory solvents and subsequently carbonised to produce carbon fibres with a circular cross-section.

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Section: Introductionmentioning

confidence: 99%

Improved procedure for electro-spinning and carbonisation of neat solvent-fractionated softwood Kraft lignin

Khan

Hararak

Fernando

2021

Sci Rep

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“…Other polymers such as poly(N-vinyl-2-pyrrolidone) (PVP) [ 184 , 188 , 189 ], poly(methyl methacrylate) (PMMA) [ 190 ], polyethylene glycol (PEG) [ 186 , 193 ], protein [ 187 ] and cellulose acetate [ 151 , 152 , 153 , 185 ] have been used as blending polymers to fabricate lignin-based electrospun CNFs as flexible electrodes, and the corresponding fabrication condition and EC performance is summarized in Table 4 . These electrodes demonstrated high EC performance mainly due to high SSA and porous structure.…”

Section: Electrochemical (Ec) Performance Of Lignocellulose-derived Carbon-based Flexible Supercapacitorsmentioning

confidence: 99%

Lignocellulosic Biomass-Derived Carbon Electrodes for Flexible Supercapacitors: An Overview

Xiang

Lin

et al. 2021

Materials

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With the increasing demand for high-performance electronic devices in smart textiles, various types of flexible/wearable electronic device (i.e., supercapacitors, batteries, fuel cells, etc.) have emerged regularly. As one of the most promising wearable devices, flexible supercapacitors from a variety of electrode materials have been developed. In particular, carbon materials from lignocellulosic biomass precursor have the characteristics of low cost, natural abundance, high specific surface area, excellent electrochemical stability, etc. Moreover, their chemical structures usually contain a large number of heteroatomic groups, which greatly contribute to the capacitive performance of the corresponding flexible supercapacitors. This review summarizes the working mechanism, configuration of flexible electrodes, conversion of lignocellulosic biomass-derived carbon electrodes, and their corresponding electrochemical properties in flexible/wearable supercapacitors. Technology challenges and future research trends will also be provided.

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“…The temperature was held for 1 h before cooling down to RT. The obtained thermostabilized fiber mat was carbonized under N 2 stream (flow rate, 0.5 L min −1 ) by heating from RT to 900°C at a heating rate of 3°C min −1 , followed by holding the temperature for 1 h. Steam activation was carried out after carbonization without cooling, according to the methods of a previous report (You et al 2016b). The resulting ligninbased ACFs derived from HKL/PEG 99/1 and 95/5 without CB are referred to as ACF-99/1 and ACF-95/5, respectively.…”

Section: Thermostabilization Carbonization and Activationmentioning

confidence: 99%

Preparation of kraft lignin-based activated carbon fiber electrodes for electric double layer capacitors using an ionic liquid electrolyte

et al. 2020

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AbstractThis article demonstrates the development of activated carbon fiber electrodes produced from hardwood kraft lignin (HKL) to fabricate electric double layer capacitors (EDLCs) with high energy and power densities using an ionic liquid (IL) electrolyte. A mixture solution of HKL, polyethylene glycol as a sacrificial polymer, and hexamethylenetetramine as a crosslinker in dimethylformamide/acetic acid (6/4) was electrospun, and the obtained fibers were easily thermostabilized, followed by carbonization and steam activation to yield activated carbon fibers (ACFs). The electrochemical performance of EDLCs assembled with the ACFs, 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) as an IL electrolyte and a cellulosic separator was insufficient due to the low conductivity of the electrode. The conductivity of the electrode was improved successfully by spraying conductive carbon black (CB) onto the fibers mat during electrospinning. The CB containing electrodes with improved conductivity gave the resulting EDLCs a higher electrochemical performance, with an energy density of 91.5 Wh kg−1 and a power density of 76.2 kW kg−1.

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Preparation of electric double layer capacitors (EDLCs) from two types of electrospun lignin fibers

Cited by 26 publications

References 33 publications

Improved procedure for electro-spinning and carbonisation of neat solvent-fractionated softwood Kraft lignin

Improved procedure for electro-spinning and carbonisation of neat solvent-fractionated softwood Kraft lignin

Lignocellulosic Biomass-Derived Carbon Electrodes for Flexible Supercapacitors: An Overview

Preparation of kraft lignin-based activated carbon fiber electrodes for electric double layer capacitors using an ionic liquid electrolyte

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