Constructed nitrogen and sulfur codoped multilevel porous carbon from lignin for high-performance supercapacitors

Tian, Jingyang; Liu, Chunyuan; Lin, Chong; Ma, Mingyang

doi:10.1016/j.jallcom.2019.03.070

Cited by 47 publications

(21 citation statements)

References 56 publications

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“…These findings illustrate that the currently developed NHPC-800//NHPC-800 supercapacitor device possesses low internal resistance and high reversibility with rapid charge/discharge rates [5,6,7,16]. Based on Equation (2), the largest specific capacitance of this device (C device ) is deduced to be 30.6 F g −1 , and the variation of C device value against current density are plotted in Figure 8c.…”

Section: Resultsmentioning

confidence: 60%

“…That is, the lower value of I D /I G usually means higher ordered structure [3,5,6]. The I D /I G value of NHPC-800 (1.02) is clearly larger than that of CC (0.95), suggesting highly disordered structure of NHPC-800, which should be attributable to the numerous pores arising from KOH etching [3,16].…”

Section: Resultsmentioning

confidence: 99%

“…For the measurements in three-electrode setup, aqueous solution of 2 M KOH was adopted as the electrolyte and rectangular nickel foam loaded with NHPC-T samples, Hg/HgO electrode as well as platinum foil were used as the working, reference and counter electrodes, respectively. The specific capacitance of a single electrode was deduced from galvanostatic charge/discharge (GCD) curves by the following Equation (1), C s = It/ΔVm where C s (F g −1 ), I(A), t (s), ΔV(V) and m(g) refer to specific capacitance of working electrode, discharge current, discharge time, discharge potential range and loading weight of active material, respectively [6,7,14,16].…”

Section: Methodsmentioning

confidence: 99%

“…EIS analysis of the supercapacitor device was surveyed at open circuit with signal amplitude of 5 mV. The specific capacitance, energy and power densities of the supercapacitor device were computed from its GCD curves by the following three equations, C device = It/ΔVm E = (C device ΔV 2 )/7.2 P = 3600E/t where C device (F g −1 ), I(A), t (s), ΔV(V), m(g), E (Wh kg −1 ) and P (W kg −1 ) stand for specific capacitance of the supercapacitor device, discharge current, discharge time, output potential difference, total mass of NHPC-800porous carbon within the device, energy density and power density, respectively [3,6,7,16].…”

Section: Methodsmentioning

confidence: 99%

“…Unfortunately, most of the microporesare not accessible to electrolyte ions on account of their narrow width of <2 nm, resulting in limited specific capacitance, poor rate performances and low energy densities of the corresponding supercapacitors. It has been proven that mesopores with the pore size range from 2 to 50 nm can not only provide effective accessible surface area but also act as spacious channel for quick penetration of electrolyte ions to micropores, while macropores (whose pore width >50 nm) are helpful to shorten the diffusion distance of electrolyte ions into inner pores by offering ion-buffering reservoirs [6,14,15,16]. Accordingly, multilevel interconnected pores (i.e., containing micropores, mesopores and macropores simultaneously) are necessary to guarantee high electrochemical performances of porous carbon-based supercapacitors [3,6,16].…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen-Doped Hierarchical Meso/Microporous Carbon from Bamboo Fungus for Symmetric Supercapacitor Applications

Zou

Lei

et al. 2019

Molecules

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We report the synthesis of nitrogen-doped hierarchical meso/microporous carbon using renewable biomass bamboo fungus as precursor via two-step pyrolysis processes. It is found that the developed porous carbon (NHPC-800) features honeycomb-like cellular framework with well-developed porosity, huge specific surface area (1708 m2 g−1), appropriate nitrogen-doping level (3.2 at.%) and high mesopore percentage (25.5%), which are responsible for its remarkable supercapacitive performances. Electrochemical tests suggest that the NHPC-800 electrode offers the largest specific capacitance of 228 F g−1, asplendid rate capability and stable electrochemical behaviors in a traditional three-electrode system. Additionally, asymmetric supercapacitor device is built based on this product as well. An individual as-assembled supercapacitor of NHPC-800//NHPC-800 delivers the maximum energy density of 4.3 Wh kg−1; retains the majority of capacitanceat large current densities; and shows terrific cycling durability with negligible capacitance drop after long-term charge/discharge for beyond 10,000 cycles even at a high current density of 10 A g−1. These excellent supercapacitive properties of NHPC-800 in both three- and two-electrode setups outperform those of lots of biomass-derived porous carbons and thus make it a perspective candidate for producing cost-effective and high-performance supercapacitors

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Section: Resultsmentioning

confidence: 60%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Nitrogen-Doped Hierarchical Meso/Microporous Carbon from Bamboo Fungus for Symmetric Supercapacitor Applications

Zou

Lei

et al. 2019

Molecules

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Nitrogen/Oxygen Enriched Hierarchical Porous Carbons Derived from Waste Peanut Shells Boosting Performance of Supercapacitors

Wen

Chi²,

Wen

et al. 2020

Adv Elect Materials

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conductivity, abundant morphology, large surface area, and tunable surface properties, porous carbons have been widely used as electrode materials for supercapacitors. [6-9] Various porous carbons have been fabricated from the green precursor of biomass, which exhibits outstanding performance in supercapacitors. Theoretically, the specific capacitance of a supercapacitor depends on the specific surface area of the carbonaceous electrode materials. The larger the surface area, the more the charge accumulated on the interface between the electrode and electrolyte distributions. [2,10,11] Up to now, massive works have been performed to activate the electrode materials to obtain a higher specific surface area. Unfortunately, most of them used some strong corrosive etchants, such as KOH, NaOH, HNO 3 , and H 3 BO 3. [12-25] Recently, Zinc chloride (ZnCl 2) has been widely used to activate the carbon materials to prepare electrode materials with larger specific surface area and proper pore size distribution for high-performance supercapacitors. [24,26-30] It can give higher carbon yield through a dehydrating process allowing more carbon to remain in the structure. [26,27] However, these traditional activation methods can improve the specific surface area of carbon materials at the cost of graphitization. [31] It is known that the electrical conductivity is vital to the electrochemical performance, especially for the rate capability in supercapacitors, which can be improved by increasing the graphitization degree of carbons. [32,33] Cobalt (Co) catalytic graphitization is an effective method to improve the graphitization of carbon materials. Jiang et al. used cobalt nitrate as the graphitization catalyst to synthesize partially graphitized ginkgo-based activated carbons showing a high performance of 178 F g −1 at a scan rate of 500 mV s −1. [32] Chang et al. reported a method of Co 2+ catalyzed graphitization and KOH activation, by which an interconnected nitrogen-doped hierarchical porous carbon with small mesopore size (2-4 nm) and high microporosity (86.8%) was synthesized from the biomass of Firmiana simplex fluff and exhibited an ultrahigh capacitance in supercapacitors. [34] It shows great advantages over the high-temperature treatment with high energy consumption and the related reduction of the surface area. Biomass is a kind of naturally abundant and costeffective precursors to prepare porous carbon materials for The high specific surface area and the fine electrical conductivity are the vital impacts, but they are always a pair of mutually counterbalancing factors in carbon-based supercapacitors. Herein, a facile strategy of the combined CoCl 2 catalytic graphitization and ZnCl 2 activation is applied to synthesize porous carbonaceous materials with enriched nitrogen and oxygen doping from a cheap and abundant biowaste of peanut shells. The as-produced carbon materials possess high surface area (1745-2257 m 2 g −1), naturally nitrogen/ oxygen co-doping, and hierarchical porous structure. These physicochemical p...

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Interface Effect of Ru‐MoS₂ Nanoflowers on Lignin Substrate for Enhanced Hydrogen Evolution Activity

Jiang

Shao

et al. 2020

Energy & Environ Materials

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The catalytic performance of Molybdenum disulfide (MoS2) has been still far from that of Pt‐based catalysts for inadequate active sites and sluggish electron transfer kinetics. Through engineering the interface between MoS2‐based materials and supported substrates, hybrid Ru‐doped MoS2 on carbonized lignin (CL) is designed and prepared as efficient catalyst for hydrogen evolution reaction (HER). The CL substrate not only facilitates the growth of MoS2 nanoflowers, but also promotes the electron transfer. Ru doping increases active sites greatly for HER. The hybrid catalyst achieves a low onset overpotential of 25 mV and a low Tafel slope of 46 mV dec−1. The favorable HER activity ascribes to the interfacial interaction between MoS2 and CL. Density functional theory calculations further confirm the improved HER performance with doped Ru atoms. This study presents a prototype application to design electrocatalysts with enhanced carrier mobility and high‐density active sites based on interface effect.

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Constructed nitrogen and sulfur codoped multilevel porous carbon from lignin for high-performance supercapacitors

Cited by 47 publications

References 56 publications

Nitrogen-Doped Hierarchical Meso/Microporous Carbon from Bamboo Fungus for Symmetric Supercapacitor Applications

Nitrogen-Doped Hierarchical Meso/Microporous Carbon from Bamboo Fungus for Symmetric Supercapacitor Applications

Nitrogen/Oxygen Enriched Hierarchical Porous Carbons Derived from Waste Peanut Shells Boosting Performance of Supercapacitors

Interface Effect of Ru‐MoS₂ Nanoflowers on Lignin Substrate for Enhanced Hydrogen Evolution Activity

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Constructed nitrogen and sulfur codoped multilevel porous carbon from lignin for high-performance supercapacitors

Cited by 47 publications

References 56 publications

Nitrogen-Doped Hierarchical Meso/Microporous Carbon from Bamboo Fungus for Symmetric Supercapacitor Applications

Nitrogen-Doped Hierarchical Meso/Microporous Carbon from Bamboo Fungus for Symmetric Supercapacitor Applications

Nitrogen/Oxygen Enriched Hierarchical Porous Carbons Derived from Waste Peanut Shells Boosting Performance of Supercapacitors

Interface Effect of Ru‐MoS2 Nanoflowers on Lignin Substrate for Enhanced Hydrogen Evolution Activity

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Interface Effect of Ru‐MoS₂ Nanoflowers on Lignin Substrate for Enhanced Hydrogen Evolution Activity