High-performance pseudocapacitors from kraft lignin modified active carbon

2019 ◽  
Vol 320 ◽  
pp. 134640 ◽  
Author(s):  
Bingjie Zhou ◽  
Wei Liu ◽  
Yutao Gong ◽  
Lichun Dong ◽  
Yulin Deng
Keyword(s):  
Active Carbon ◽  
High Performance ◽  
Kraft Lignin

scholarly journals Defect-induced B4C electrodes for high energy density supercapacitor devices

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Özge Balcı ◽  
Merve Buldu ◽  
Ameen Uddin Ammar ◽  
Kamil Kiraz ◽  
Mehmet Somer ◽  
...  
Keyword(s):  
Active Carbon ◽  
High Performance ◽  
Carbon Sources ◽  
High Energy ◽  
High Energy Density ◽  
Synthesis Conditions ◽  
High Energy Ball Mill ◽  
Energy Ball ◽  
G Ratio ◽  
Energy And Power Density

AbstractBoron carbide powders were synthesized by mechanically activated annealing process using anhydrous boron oxide (B2O3) and varying carbon (C) sources such as graphite and activated carbon: The precursors were mechanically activated for different times in a high energy ball mill and reacted in an induction furnace. According to the Raman analyses of the carbon sources, the I(D)/I(G) ratio increased from ~ 0.25 to ~ 0.99, as the carbon material changed from graphite to active carbon, indicating the highly defected and disordered structure of active carbon. Complementary advanced EPR analysis of defect centers in B4C revealed that the intrinsic defects play a major role in the electrochemical performance of the supercapacitor device once they have an electrode component made of bare B4C. Depending on the starting material and synthesis conditions the conductivity, energy, and power density, as well as capacity, can be controlled hence high-performance supercapacitor devices can be produced.

Nitrogen, oxygen and sulfur co-doped hierarchical porous carbons toward high-performance supercapacitors by direct pyrolysis of kraft lignin

Carbon ◽  
2019 ◽  
Vol 149 ◽  
pp. 105-116 ◽  
Author(s):  
Fangyan Liu ◽  
Zixing Wang ◽  
Haitao Zhang ◽  
Long Jin ◽  
Xiang Chu ◽  
...  
Keyword(s):  
High Performance ◽  
Kraft Lignin ◽  
Porous Carbons ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons ◽  
Co Doped

Purification and characterization of kraft lignin

Holzforschung ◽  
2015 ◽  
Vol 69 (8) ◽  
pp. 943-950 ◽  
Author(s):  
Wenwen Fang ◽  
Marina Alekhina ◽  
Olga Ershova ◽  
Sami Heikkinen ◽  
Herbert Sixta
Keyword(s):  
Thermal Properties ◽  
High Performance ◽  
Inorganic Compounds ◽  
Gel Permeation Chromatography ◽  
Kraft Lignin ◽  
Hot Water ◽  
Scanning Calorimetry ◽  
Target Values ◽  
Lower Glass Transition Temperature

Abstract To upgrade the utilization of kraft lignin (KL) for high-performance lignin-based materials (e.g., carbon fiber), the purity, molecular mass distribution (MMD), and thermal properties need to be improved and adjusted to target values. Therefore, different methods, such as ultrasonic extraction (UE), solvent extraction, dialysis, and hot water treatment (HWT), were applied for the purification of KL. The chemical and thermal properties of purified lignin have been characterized by nuclear magnetic resonance, Fourier transform infrared, gel permeation chromatography, elemental analysis, differential scanning calorimetry, and thermogravimetric analysis. The lignin fractions obtained by UE with ethanol/acetone (E/A) mixture (9:1) revealed a very narrow MMD and were nearly free of inorganic compounds and carbohydrates. Further, the E/A-extracted lignin showed a lower glass transition temperature (Tg) and a clearly detectable melting temperature (Tm). Dialysis followed by HWT at 220°C is an efficient method for the removal of inorganics and carbohydrates; however, lignin was partly forming condensed structures during the treatment.

Electrospun Kraft Lignin/Cellulose Acetate-Derived Nanocarbon Network as an Anode for High-Performance Sodium-Ion Batteries

2018 ◽  
Vol 10 (51) ◽  
pp. 44368-44375 ◽  
Author(s):  
Hao Jia ◽  
Na Sun ◽  
Mahmut Dirican ◽  
Ya Li ◽  
Chen Chen ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
High Performance ◽  
Kraft Lignin ◽  
Sodium Ion ◽  
Sodium Ion Batteries

Active carbon electrode fabricated via large-scale coating-transfer process for high-performance supercapacitor

2017 ◽  
Vol 123 (7) ◽  
Author(s):  
Hui Guo ◽  
Zheng Liu ◽  
Hengyue Li ◽  
Han Wu ◽  
Chujun Zhang ◽  
...  
Keyword(s):  
Transfer Process ◽  
Active Carbon ◽  
High Performance ◽  
Large Scale ◽  
Carbon Electrode

Porous Active Carbon Layer Modified Graphene for High-performance Supercapacitor

2017 ◽  
Vol 237 ◽  
pp. 102-108 ◽  
Author(s):  
Zhendong Chen ◽  
Kai Liu ◽  
Sheng Liu ◽  
Lu Xia ◽  
Jijiang Fu ◽  
...  
Keyword(s):  
Active Carbon ◽  
High Performance ◽  
Carbon Layer ◽  
Modified Graphene

Biobased Nano Porous Active Carbon Fibers for High-Performance Supercapacitors

2016 ◽  
Vol 8 (24) ◽  
pp. 15205-15215 ◽  
Author(s):  
Yuxiang Huang ◽  
Lele Peng ◽  
Yue Liu ◽  
Guangjie Zhao ◽  
Jonathan Y. Chen ◽  
...  
Keyword(s):  
Carbon Fibers ◽  
Active Carbon ◽  
High Performance

Immobilization of tungsten disulfide nanosheets on active carbon fibers as electrode materials for high performance quasi-solid-state asymmetric supercapacitors

2018 ◽  
Vol 6 (17) ◽  
pp. 7835-7841 ◽  
Author(s):  
Xiaoming Qiu ◽  
Luning Wang ◽  
Li-Zhen Fan
Keyword(s):  
Solid State ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Active Carbon ◽  
High Performance ◽  
Electrode Materials ◽  
Tungsten Disulfide ◽  
Asymmetric Supercapacitors ◽  
One Dimensional ◽  
The One

A novel tungsten disulfide/active carbon fiber (WS2/ACF) nanocomposite was synthesized through electrospinning and a subsequent hydrothermal method, with the WS2 nanosheets homogeneously decorated on the surface of the one-dimensional active carbon fiber.

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