A facile route to high nitrogen-containing porous carbon fiber sheets from biomass-flax for high-performance flexible supercapacitors

He, Da; Wu, Ling; Yao, Yucen; Jiang, Zhang; Huang, Zheng‐Hong; Wang, Mingxi

doi:10.1016/j.apsusc.2019.145108

Cited by 59 publications

(28 citation statements)

References 66 publications

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“…The specific surface area and porosity of Zn/Co-MOF and Zn/Co-MOF derived nanoporous carbon (NPC) and metal oxides were characterized by nitrogen adsorption/desorption measurements at 77 K and pore size distributions (PSDs) analysis. As depicted in Figure 4A , all the samples show obvious hysteresis loop at the relative pressure range of 0.48–0.99 between the adsorption and desorption branches, so these isotherms can be classified into a type IV curve according to the IUPAC definition and classification (He et al, 2019 , 2020 ). The presence of a hysteresis loop suggested that there are a number of mesopores in these samples.…”

Section: Resultsmentioning

confidence: 99%

Asymmetric Supercapacitors Based on Hierarchically Nanoporous Carbon and ZnCo2O4 From a Single Biometallic Metal-Organic Frameworks (Zn/Co-MOF)

Gao

Yao

et al. 2020

Front. Chem.

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Metal-organic framework (MOF)-derived nanoporous carbons (NPCs) and porous metal oxide nanostructures or nanocomposites have gathered considerable interest due to their potential use in supercapacitor (SCs) applications, owing to their precise control over porous architectures, pore volumes, and surface area. Bimetallic MOFs could provide rich redox reactions deriving from improved charge transfer between different metal ions, so their supercapacitor performance could be further greatly enhanced. In this study, “One-for-All” strategy is adopted to synthesize both positive and negative electrodes for hybrid asymmetric SCs (ASCs) from a single bimetallic MOF. The bimetallic Zn/Co-MOF with cuboid-like structures were synthesized by a simple method. The MOF-derived nanoporous carbons (NPC) were then obtained by post-heat treatment of the as-synthesized Zn/Co-MOF and rinsing with HCl, and bimetallic oxides (ZnCo 2 O 4 ) were achieved by sintering the Zn/Co-MOF in air. The as-prepared MOF-derived NPC and bimetallic oxides were utilized as negative and positive materials to assemble hybrid ASCs with 6 M KOH as an electrolyte. Owing to the matchable voltage window and specific capacitance between the negative (NPC) and positive (ZnCo 2 O 4 ), the as-assembled ASCs delivered high specific capacitance of 94.4 F/g (cell), excellent energy density of 28.6 Wh/kg at a power density of 100 W/kg, and high cycling stability of 87.2% after 5,000 charge-discharge cycles. This strategy is promising in producing high-energy-density electrode materials in supercapacitors.

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Section: Resultsmentioning

confidence: 99%

Asymmetric Supercapacitors Based on Hierarchically Nanoporous Carbon and ZnCo2O4 From a Single Biometallic Metal-Organic Frameworks (Zn/Co-MOF)

Gao

Yao

et al. 2020

Front. Chem.

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“…However, most nitrogen self‐doped BDCs suffer from low nitrogen contents, negatively affecting the electrochemical performances. Thus, the nitrogen sources, such as melamine, 74,75,118,175 urea, 96,176–178 dicyandiamide, 83 ammonia, 179 polyethylenimine, 176 and ammonium chloride, 180 are widely used to increase the nitrogen content in BDCs. In this regard, BDC from peanut shell has shown nitrogen‐doped porous structure with specific surface area of 1442 m 2 ·g –1 and nitrogen content of 3.2 at.%, leading to the higher specific capacitance of 216 F·g –1 when compared to the material without nitrogen‐doping (167 F·g –1 ).…”

Section: Influencing Factors Of Bdcs In Ecsmentioning

confidence: 99%

Renewable biomass‐derived carbons for electrochemical capacitor applications

Luo

Chen

et al. 2021

SusMat

123

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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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“…Chemical surface modification of AC can be achieved by the addition of chemical agents (i.e., nitric acid (HNO 3 ), hydrogen peroxide(H 2 O 2 ), sulfuric acid (H 2 SO 4 ) [ 126 , 127 ], ammonium peroxydisulfate, melamine [ 128 ] and ammonia (NH 3 ) [ 129 ], etc.) to introduce acidic (oxygen-containing) or basic (nitrogen-containing) functional groups.…”

Section: Fabrication Of Lignocellulose-based Carbonmentioning

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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A facile route to high nitrogen-containing porous carbon fiber sheets from biomass-flax for high-performance flexible supercapacitors

Cited by 59 publications

References 66 publications

Asymmetric Supercapacitors Based on Hierarchically Nanoporous Carbon and ZnCo2O4 From a Single Biometallic Metal-Organic Frameworks (Zn/Co-MOF)

Asymmetric Supercapacitors Based on Hierarchically Nanoporous Carbon and ZnCo2O4 From a Single Biometallic Metal-Organic Frameworks (Zn/Co-MOF)

Renewable biomass‐derived carbons for electrochemical capacitor applications

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

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