Template free one pot synthesis of heteroatom doped porous Carbon Electrodes for High performance symmetric supercapacitor

Chulliyote, Reshma; Hareendrakrishnakumar, Haritha; Joseph, Mary Gladis

doi:10.1016/j.electacta.2020.135698

Cited by 14 publications

(3 citation statements)

References 63 publications

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“…The incorporation of heteroatoms within BDCs usually alters the electron‐accepting or donating characteristics, as well as the structures, thereby influencing the electrochemical performances. In general, O, N, P, and S elements inherited in biomass can form self‐doped BDCs by controlled pyrolysis of biomass precursors 162–165 . On the other hand, heteroatom‐doped BDCs can be obtained by heteroatom‐containing dopants 74 …”

Section: Influencing Factors Of Bdcs In Ecsmentioning

confidence: 99%

Renewable biomass‐derived carbons for electrochemical capacitor applications

Luo

Chen

et al. 2021

SusMat

118

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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%

Renewable biomass‐derived carbons for electrochemical capacitor applications

Luo

Chen

et al. 2021

SusMat

118

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“…The capacitance of carbon-based materials can gain more capacitance by introducing the other energy storage mechanism: redox reaction. Decorating with heteroatoms [8,9], incorporating redox-active materials could take the capacitance of carbonbased hybrid materials to the next level.…”

Section: Introductionmentioning

confidence: 99%

Coherent Integration of Organic Gel Polymer Electrolyte and Ambipolar Polyoxometalate Hybrid Nanocomposite Electrode in a Compact High-Performance Supercapacitor

2022

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We report a gel polymer electrolyte (GPE) supercapacitor concept with improved pathways for ion transport, thanks to a facile creation of a coherent continuous distribution of the electrolyte throughout the electrode. Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) was chosen as the polymer framework for organic electrolytes. A permeating distribution of the GPE into the electrodes, acting both as integrated electrolyte and binder, as well as thin separator, promotes ion diffusion and increases the active electrode–electrolyte interface, which leads to improvements both in capacitance and rate capability. An activation process induced during the first charge–discharge cycles was detected, after which, the charge transfer resistance and Warburg impedance decrease. We found that a GPE thickness of 12 μm led to optimal capacitance and rate capability. A novel hybrid nanocomposite material, formed by the tetraethylammonium salt of the 1 nm-sized phosphomolybdate cluster and activated carbon (AC/TEAPMo12), was shown to improve its capacitive performance with this gel electrolyte arrangement. Due to the homogeneous dispersion of PMo12 clusters, its energy storage process is non-diffusion-controlled. In the symmetric capacitors, the hybrid nanocomposite material can perform redox reactions in both the positive and the negative electrodes in an ambipolar mode. The volumetric capacitance of a symmetric supercapacitor made with the hybrid electrodes increased by 40% compared to a cell with parent AC electrodes. Due to the synergy between permeating GPE and the hybrid electrodes, the GPE hybrid symmetric capacitor delivers three times more energy density at higher power densities and equivalent cycle stability compared with conventional AC symmetric capacitors.

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“…The structures of lignocellulose stocks are typically composed of carbon (C), hydrogen (H) and heteroatoms of oxygen (O) [ 17 ], nitrogen (N), sulfur (S) and phosphorus (P), etc. In general, these heteroatoms can result in self-doped biomass-derived carbon after pyrolysis [ 18 , 19 ]. They often boost the electrical conductivity, improve the surface wettability, introduce pseudocapacitance, accelerate the charge transfer, and facilitate the electrode/electrolyte interface reactions in lignocellulose-derived carbon, thereby enhancing the EC performance of lignocellulosic biomass-derived carbon electrode-based supercapacitors [ 20 , 21 , 22 ].…”

Section: Introductionmentioning

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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Template free one pot synthesis of heteroatom doped porous Carbon Electrodes for High performance symmetric supercapacitor

Cited by 14 publications

References 63 publications

Renewable biomass‐derived carbons for electrochemical capacitor applications

Renewable biomass‐derived carbons for electrochemical capacitor applications

Coherent Integration of Organic Gel Polymer Electrolyte and Ambipolar Polyoxometalate Hybrid Nanocomposite Electrode in a Compact High-Performance Supercapacitor

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

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