Biomass based N-doped hierarchical porous carbon nanosheets for all-solid-state supercapacitors

Chen, Mingfeng; Yu, Dan; Zheng, Xiaozhong; Dong, Xiaoping

doi:10.1016/j.est.2018.11.017

Cited by 158 publications

(53 citation statements)

References 59 publications

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“…3(a) the near rectangular CV curve of rGO on Ni foam in the potential range of 0-0.6 V vs. Ag|AgCl is typical of EDLC charge storage mechanism, as could be expected from porous conducting carbonaceous matrix. [15][16][17] With NiCo 2 Se 4 on the other hand, the distinctive redox peak in the potential range of 0-0.5 V vs. Ag|AgCl veried the electrochemical pseudocapacitor-like behavior of this compound. The CV curve of NiCo 2 Se 4 -rGO@NF as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…5 The supercapacitors can be classied into three categories based on their charge storage mechanism and use of active electrode materials: (i) electrochemical double layer capacitor (EDLC) which stores charge in highly porous or high surface area electrodes such as carbon-based materials including graphene, CNTs etc. ; [15][16][17] (ii) pseudocapacitors, also known as redox supercapacitors, which stores charge through reversible electrochemical redox reactions using the variable oxidation states of transition metal based centers in the corresponding oxides, [18][19][20][21] hydroxides, [21][22][23][24] chalcogenides [25][26][27][28] as electrode materials; (iii) hybrid electrochemical capacitor which are a combination of both EDLCs and pseudocapacitors and incorporate redox-active transition metal-based centers onto high surface area, porous electrodes. [29][30][31][32] EDLCs store charge electrostatically via generation of electrical double layer in the non-faradaic region at the interface between electrode and electrolyte.…”

Section: Introductionmentioning

confidence: 99%

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Facile one-pot synthesis of NiCo₂Se₄-rGO on Ni foam for high performance hybrid supercapacitors

2019

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Facile one-pot synthesis of NiCo₂Se₄-rGO on Ni foam for high performance hybrid supercapacitors

2019

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“…Some structural features in disordered biomass carbon samples may cause structural defects. Especially for highly disordered carbonaceous materials, more information about the structure is hidden between the “overlap” G and D bands . Therefore, it is necessary to perform a deconvolution curve‐fitting on the Raman spectrum in order to get detailed information about the skeleton biochar structure in the disordered carbon samples .…”

Section: Resultsmentioning

confidence: 99%

“…Especially for highly disordered carbonaceous materials, more information about the structure is hidden between the "overlap" G and D bands. 43 Therefore, it is necessary to perform a deconvolution curve-fitting on the Raman spectrum in order to get detailed information about the skeleton biochar structure in the disordered carbon samples. 44 The assignment of curve-fit bands is summarized in Table S1 of the Supplementary Material.…”

Section: Raman Analysismentioning

confidence: 99%

Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO ₂ capture

2020

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Summary Biomass based carbon has captured more and more attention because it is environmentally friendly and has properties of low cost and ideal sustainability. In this study, three kinds of activated biomass carbons (ie, ABC‐700, ABC‐800 and ABC‐900) were first carbonized through pine sawdust pyrolysis and then activated using KOH under three different activation temperatures (ie, 700°C, 800°C and 900°C). The structure properties of the prepared activated biomass carbons were characterized by N2‐adsorption/desorption, SEM, TEM, XRD, Raman, XPS, TG and ultimate analysis. To clarify the activation mechanism, the gas products produced during KOH activation process were measured online with an ETG gas analyzer. The performance of the activated biomass carbons derived from pine sawdust for supercapacitor and CO2 capture was then evaluated. The predominant gas products during the activation process are H2 and CO. It indicates that the porous structure was created by using an enhanced etching reaction between carbon atoms and KOH. An increment of the activation temperature from 700 to 900°C results in the increase of surface area (from 1728.66 to 2330.89 m2/g) and total pore volume (from 0.671 to 1.914 cm3/g). Among the three samples, ABC‐900 exhibits the maximal specific capacitance of 175.6 F·g−1 and high energy density of 24.39 Wh·kg−1 at the 0.5 A·g−1. And the ABC‐700 shows the maximal CO2 capture capacity of 4.21 mmol/g and high selectivity of CO2 over N2 at 298 K and 1 bar. In addition, ABC‐700 also has excellent stability and reproducibility after 15 times adsorption‐desorption cycles. The unexceptionable electrochemical performance and adsorption capacity of the biomass‐carbons show its broad application prospects in the field of supercapacitors and CO2 capture.

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“…Especially, carbonization of biomass is one of the most used methods due to low cost and easy accessibility. Quantities of porous carbon materials with high specific surface area are prepared by carbonization and further activation of precursors such as petroleum pitch, rice bran and coconut shell [19,21–26] . Unfortunately, this method fails to accurately regulate the pore structure of carbon.…”

Section: Methodsmentioning

confidence: 99%

Nitrogen‐Rich Hierarchical Porous Carbon Prepared by Sol‐Gel Assisted Inorganic Template Methods for Supercapacitors

Jin

Meng

Lin

et al. 2020

Batteries & Supercaps

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Nitrogen‐rich and porous carbon materials have attracted great attention for supercapacitors due to the relatively large specific surface area, highly active N species and good electrical conductivity. However, it is still a challenge to precisely regulate the above characteristics simultaneously. Here artful sol‐gel‐assisted inorganic template methods are proposed by using melamine and polyethylene glycol (PEG) as complement and magnesium nitrate as inorganic salt to prepare nitrogen‐rich hierarchical porous carbon with three different pore structure (1.75 nm, 3.8 nm and 9.07 nm), giving the opportunity to regulate the specific surface area and pore size distribution of the carbon materials. The designer porous carbon possesses more than 9 at. % of the pyridinic nitrogen (N‐6) and pyrrolic nitrogen (N‐5), a high specific surface area of 917.0 m2 g−1 and good electrical conductivity (1.28 S cm−1). All these factors result in a specific capacitance up to 371 F g−1 at 1 A g−1 and excellent cycle stability (retain 98.3 % capacitance after 10000 cycles).

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Biomass based N-doped hierarchical porous carbon nanosheets for all-solid-state supercapacitors

Cited by 158 publications

References 59 publications

Facile one-pot synthesis of NiCo₂Se₄-rGO on Ni foam for high performance hybrid supercapacitors

Facile one-pot synthesis of NiCo₂Se₄-rGO on Ni foam for high performance hybrid supercapacitors

Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO ₂ capture

Nitrogen‐Rich Hierarchical Porous Carbon Prepared by Sol‐Gel Assisted Inorganic Template Methods for Supercapacitors

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Biomass based N-doped hierarchical porous carbon nanosheets for all-solid-state supercapacitors

Cited by 158 publications

References 59 publications

Facile one-pot synthesis of NiCo2Se4-rGO on Ni foam for high performance hybrid supercapacitors

Facile one-pot synthesis of NiCo2Se4-rGO on Ni foam for high performance hybrid supercapacitors

Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO 2 capture

Nitrogen‐Rich Hierarchical Porous Carbon Prepared by Sol‐Gel Assisted Inorganic Template Methods for Supercapacitors

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Facile one-pot synthesis of NiCo₂Se₄-rGO on Ni foam for high performance hybrid supercapacitors

Facile one-pot synthesis of NiCo₂Se₄-rGO on Ni foam for high performance hybrid supercapacitors

Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO ₂ capture