The preparation of liquefied bio-stalk carbon nanofibers and their application in supercapacitors

Jiang, Xia; Liu, Chao; Shi, Gaofeng; Wang, Guoying; Wang, Zhao; Jia, Shiming; Dong, Yucan; Mishra, Puranjan; Tian, Haoqi; Liu, Yanrong

doi:10.1039/c9ra03361k

Cited by 13 publications

(5 citation statements)

References 35 publications

(12 reference statements)

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“…Various methods have been employed to prepare fibrous BDCs, including pyrolysis, electrospinning, ultrasonication, and hydrothermal 2 . Regarding this, fibrous BDC from hemp straw (Figure 9A) can be obtained by polyacrylonitrile assisted electrospinning followed by KOH activation 215 . Fibrous BDC from sawdust might be acquired through pyrolysis of Fe 3+ ‐preloaded sawdust, which can effectively catalyze the growth of carbon nanofibers 216 …”

Section: Influencing Factors Of Bdcs In Ecsmentioning

confidence: 99%

“…(A) Morphologies of fibrous/tubular BDCs from hemp straw, (reproduced with permission: 2019, Royal Society of Chemistry) 215 waste‐cotonier strobili fibers (B), 220 cotton stalk (inset in BDCs/Ni‐Al hydroxide nanosheets) (C), 221 and kapok fiber (inset of BDCs/NiO composite) (D) 217 (reproduced with permission: Copyright 2018, 2019, and 2016, Elsevier, respectively)…”

Section: Influencing Factors Of Bdcs In Ecsmentioning

confidence: 99%

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Renewable biomass‐derived carbons for electrochemical capacitor applications

Luo

Chen

et al. 2021

SusMat

121

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Biomass is rich, renewable, sustainable, and green resources, thereby excellent raw material for the fabrication of carbon materials. The diversity in structure and morphology of biomass are relevant in obtaining carbon materials with different structures and performances. The inherent ordered porous structure of biomass also benefits the activation process to yield porous carbons with ultrahigh specific surface area and pore volume. Besides, obtained biomass‐derived carbons (BDCs) are hard carbon with porous morphology, stable structure, superior hardness/strength, and good cycling performances when used in electrochemical capacitors (ECs). The inherent N, S, P, and O elements in biomass yield naturally self‐doped N, S, P, and O BDCs with unique intrinsic structures. In this paper, the synthesis approaches and applications of BDCs in ECs are reviewed. It shows that BDCs electrochemical performances are highly determined by their pore structures, specific surface areas, heteroatoms doping, graphitization degree, defects, and morphologies. The electrochemical performances of BDCs can further be improved by compositing with other materials, such as graphene, carbon nanofibers/nanotubes, transition metal oxides or hydroxides, and conducting polymers. The future challenges and outlooks of BDCs are also provided.

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Section: Influencing Factors Of Bdcs In Ecsmentioning

confidence: 99%

Section: Influencing Factors Of Bdcs In Ecsmentioning

confidence: 99%

Renewable biomass‐derived carbons for electrochemical capacitor applications

Luo

Chen

et al. 2021

SusMat

121

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“…The specific capacitance ( C , F/g) was calculated from the CV curves and GCD curves according to the following equations 20 , 21 where m (g) is the mass of the carbon electrode, V (mV/s) is the scanning rate and ΔV (V), I (A) and Δt (s) designate the voltage window, discharge current and discharge time, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Carbon nanofibers (CNFs) have potential application in the field of supercapacitors because of their superior chemical stability, excellent conductivity, high specific surface area and easy control of pore size distribution. 3 , 4 According to the existing literature reports, the precursors used to prepare CNFs mainly include viscose, pitch and polyacrylonitrile (PAN). However, carbon fibers prepared from these precursor materials have corresponding shortcomings, such as the low carbonization yield of viscose-based carbon fibers, the complicated preparation process of pitch-based carbon fibers and the high production cost of PAN-based carbon fibers, which limit the application and development of carbon fibers to a certain extent.…”

mentioning

confidence: 99%

Electrospun flexible lignin/polyacrylonitrile-based carbon nanofiber and its application in electrode materials for supercapacitors

Liu

Jiang

et al. 2021

Textile Research Journal

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In this study, a lignin/polyacrylonitrile (PAN) composite nanofiber membrane is prepared by electrospinning and used as the precursor to prepare flexible carbon nanofibers (CNFs) through pre-oxidation and carbonization. The micromorphology, crystal structure, pore size distribution and specific surface area of the CNFs are characterized by field emission scanning electron microscopy, X-ray diffraction, Raman spectroscopy and specific surface adsorption analysis, respectively. The electrochemical properties of the CNF membrane are also investigated by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy due to its potential application in binder-free electrode materials for supercapacitors. We successfully prepared flexible CNFs with an average diameter of about 539 nm and a specific surface area of 1053.78 m2/g when the mass ratio of lignin to PAN was 9:1 in a solution concentration of 28 wt%. The CNFs are loaded onto nickel foam to prepare the electrode materials for supercapacitors without a binder. When the current density is 0.5 A/g, the specific capacitance could be up to 201.27 F/g and the equivalent series resistance is only 0.57 Ω, which shows an excellent electrochemical performance. This study not only provides a theoretical basis for the high-value utilization of lignin and the preparation of flexible lignin/PAN-based CNFs, but also provides a new type of environmentally friendly raw material for the electrodes of supercapacitors and could be helpful to alleviate the energy crisis and environmental pollution.

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“…Supercapacitors (SC), as one of the most promising energy storage devices, provide an opportunity to address this challenge and are becoming more prevalent due to their multiple advantages, such as quick recharging, high specic power density, and long cycling life. 2,3 Typically, carbon materials, including carbon nanotubes, 4 graphene, 5 carbon nanosheets, 6,7 activated carbon, 8 metalorganic frameworks (MOFs) 9 and carbon nanobers 10 are oen used as electrical double-layer capacitor (EDLC) electrodes. Nevertheless, there are a number of issues that affect the commercial application of these materials, including high cost, poor electrical conductivity, and low power density.…”

Section: Introductionmentioning

confidence: 99%