3D honeycomb-like carbon foam synthesized with biomass buckwheat flour for high-performance supercapacitor electrodes

Huang, Jing; Wu, Jinggao; Dai, Fangyin; Li, Chang Ming

doi:10.1039/c9cc03039e

Cited by 56 publications

(25 citation statements)

References 38 publications

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“…[103] As-engineered codoped nanocarbons have striking properties such as more active sites, hydrophilicity, increased surface area with balanced micro-meso-macropores, excellent structural stability, enhanced DOS(E F ), improved electronic conductivity, enhanced chargetransfer kinetics, better electrode-electrolyte interactions which enhance the total capacitance via quantum capacitance and pseudocapacitive contributions. [215,[245][246][247][248][249] The codoping into nanocarbons can be classified into two categories: i) dopants with the same charge carriers (n-types or p-types) and ii) dopants with the opposite charge carriers (n-types and p-types). The following subsections cover the effects of codoping (binary, ternary, etc.)…”

Section: Doped and Defected Nanocarbonsmentioning

confidence: 99%

Heteroatom‐Doped and Oxygen‐Functionalized Nanocarbons for High‐Performance Supercapacitors

Ghosh

Barg

Jeong

et al. 2020

Advanced Energy Materials

434

237

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Electrochemical capacitors (best known as supercapacitors) are high‐performance energy storage devices featuring higher capacity than conventional capacitors and higher power densities than batteries, and are among the key enabling technologies of the clean energy future. This review focuses on performance enhancement of carbon‐based supercapacitors by doping other elements (heteroatoms) into the nanostructured carbon electrodes. The nanocarbon materials currently exist in all dimensionalities (from 0D quantum dots to 3D bulk materials) and show good stability and other properties in diverse electrode architectures. However, relatively low energy density and high manufacturing cost impede widespread commercial applications of nanocarbon‐based supercapacitors. Heteroatom doping into the carbon matrix is one of the most promising and versatile ways to enhance the device performance, yet the mechanisms of the doping effects still remain poorly understood. Here the effects of heteroatom doping by boron, nitrogen, sulfur, phosphorus, fluorine, chlorine, silicon, and functionalizing with oxygen on the elemental composition, structure, property, and performance relationships of nanocarbon electrodes are critically examined. The limitations of doping approaches are further discussed and guidelines for reporting the performance of heteroatom doped nanocarbon electrode‐based electrochemical capacitors are proposed. The current challenges and promising future directions for clean energy applications are discussed as well.

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Section: Doped and Defected Nanocarbonsmentioning

confidence: 99%

Heteroatom‐Doped and Oxygen‐Functionalized Nanocarbons for High‐Performance Supercapacitors

Ghosh

Barg

Jeong

et al. 2020

Advanced Energy Materials

434

237

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“…Among them, sustainable biomass derived carbons are individual class of materials, with the advantage of low-cost, abundant and sustainable in nature, excellent electrical conductivity and specific surface area (SSA) (Pandolfo and Hollenkamp, 2006;Jiang et al, 2013;Titirici et al, 2015;Gong et al, 2017;He et al, 2018). Number of researchers have derived carbon from different biomass sources such as Perilla frutescens (Liu et al, 2017a), Rice straw , Peanut shells (Xiao et al, 2018), Buckwheat flour (Huang et al, 2019), Peach gum (Lin et al, 2019), and Bamboo . By using KOH through chemical activation Cheng et al (2016) have prepared flexible carbon fiber aerogel from natural cotton and achieved specific capacitance of 283 F/g at 1 A/g.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen and Phosphorus Co-doped Porous Carbon for High-Performance Supercapacitors

Zhou

Zeng

et al. 2020

Front. Chem.

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As one of the most promising fast energy storage devices, supercapacitor has been attracting intense attention for many emerging applications. However, how to enhance the electrochemical performance of electrode materials is still the main issue among various researches. In this paper, hierarchical porous carbons derived from Eleocharis dulcis has been prepared by chemical activation process with the aid of KOH at elevated temperature. Results show that the N, P co-doped porous carbon exhibits excellent electrochemical performance, it owns a specific capacitance of 340.2 F/g at 1 A/g, and obtains outstanding cycling stability of 96.9% of capacitance retention at 10 A/g after 5,000 cycles in a three-electrode system. Moreover, in the two-electrode system, the product still maintains a high specific capacitance of 227.2 F/g at 1 A/g, and achieves good electrochemical cycle stability (94.2% of capacitance retention at 10 A/g after 10,000 cycles); besides, its power/energy density are 3694.084 and 26.289 Wh/kg, respectively. Therefore, the combination of facile synthesis strategy and excellent electrochemical performance makes Eleocharis dulcis-based porous carbon as a promising electrode material for supercapacitor.

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“…Examples of such biomasses include wood, cotton, cellulose bers, wheat our, bread, and even sh skin. [14][15][16][17][18][19] Even though the precursors are abundant, and wide range of cellular microstructures are available, the structuring of these materials into the required 3D shapes is still challenging. Traditional methods for 3D shaping of the cellular carbon mostly rely on molding of the cellular precursor.…”

Section: Introductionmentioning

confidence: 99%

Facile template-free synthesis of multifunctional 3D cellular carbon from edible rice paper

et al. 2020

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3D honeycomb-like carbon foam synthesized with biomass buckwheat flour for high-performance supercapacitor electrodes

Abstract: A facile, one-step carbonization of buckwheat flour is innovated to synthesize honeycomb-like porous carbon, which exhibits specific capacitance (767 F g−1 at 1 A g−1) and stability with a retention of up to 92.6% after 10 000 cycles.

Cited by 56 publications

References 38 publications

Heteroatom‐Doped and Oxygen‐Functionalized Nanocarbons for High‐Performance Supercapacitors

Heteroatom‐Doped and Oxygen‐Functionalized Nanocarbons for High‐Performance Supercapacitors

Nitrogen and Phosphorus Co-doped Porous Carbon for High-Performance Supercapacitors

Facile template-free synthesis of multifunctional 3D cellular carbon from edible rice paper

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