Green Synthesis of Nitrogen-doped Porous Carbon Derived from Rice Straw for High-performance Supercapacitor Application

Xu, Zenghua; Zhang, Ximing; Liang, Yue; Lin, Hongjian; Zhang, Shen; Liu, Jianglong; Jin, Caidi; Choe, Ungyong; Sheng, Kuichuan

doi:10.1021/acs.energyfuels.0c01346

Cited by 86 publications

(68 citation statements)

References 61 publications

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“…Figure 6 b shows the GCD curves of the BLHPC-Zn/K//BLHPC-Zn/K symmetric supercapacitor at a current density from 0.5 to 10 A g −1 , which exhibits highly linear symmetry with low IR drop (0.02 V at 0.5 A g −1 ), suggesting its outstanding reversibility and low internal resistance. Based on the GCD test results ( Figure S4 ), energy density corresponding to power density was calculated, and Ragone plots are shown in Figure 6 c. Notably, the symmetric supercapacitor in aqueous electrolytes possesses a maximum energy density of 29.2 W h kg −1 at a power density of 250 W kg −1 , which is much larger than those reported previously ( Table S1 ) [ 41 , 42 , 43 , 44 , 45 , 46 ]. The cycling performance at a current density of 4 A g −1 was exhibited in Figure 6 f. After 10,000 cycle tests, the capacitance retention rate of the BLHPC-Zn/K//BLHPC-Zn/K supercapacitor could reach 92.4%, indicating excellent cycle stability.…”

Section: Resultsmentioning

confidence: 83%

B, O and N Codoped Biomass-Derived Hierarchical Porous Carbon for High-Performance Electrochemical Energy Storage

et al. 2022

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High specific surface area, reasonable pore structure and heteroatom doping are beneficial to enhance charge storage, which all depend on the selection of precursors, activators and reasonable preparation methods. Here, B, O and N codoped biomass-derived hierarchical porous carbon was synthesized by using KCl/ZnCl2 as a combined activator and porogen and H3BO3 as both boron source and porogen. Moreover, the cheap, environmentally friendly and heteroatom-rich laver was used as a precursor, and impregnation and freeze-drying methods were used to make the biological cells of laver have sufficient contact with the activator so that the layer was deeply activated. The as-prepared carbon materials exhibit high surface area (1514.3 m2 g−1), three-dimensional (3D) interconnected hierarchical porous structure and abundant heteroatom doping. The synergistic effects of these properties promote the obtained carbon materials with excellent specific capacitance (382.5 F g−1 at 1 A g−1). The symmetric supercapacitor exhibits a maximum energy density of 29.2 W h kg−1 at a power density of 250 W kg−1 in 1 M Na2SO4, and the maximum energy density can reach to 51.3 W h kg−1 at a power density of 250 W kg−1 in 1 M BMIMBF4/AN. Moreover, the as-prepared carbon materials as anode for lithium-ion batteries possess high reversible capacity of 1497 mA h g−1 at 1 A g−1 and outstanding cycling stability (no decay after 2000 cycles).

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Section: Resultsmentioning

confidence: 83%

B, O and N Codoped Biomass-Derived Hierarchical Porous Carbon for High-Performance Electrochemical Energy Storage

et al. 2022

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“…Also, the above result is preferable to previous carbon-based reports. [46][47][48][49][50] Figure 4E shows the EIS spectra of the symmetric supercapacitor. The vertical line at the lowfrequency region confirms the excellent capacitance of the material.…”

Section: Electrochemical Behavior Of Symmetrical Supercapacitormentioning

confidence: 99%

Synthesis of sulfur‐doped porous carbon for supercapacitor and gas adsorption applications

Mishra

Panda

Barman

2021

Intl J of Energy Research

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Heteroatom-doped porous carbon materials have great potential for both capacitive energy storage and gas sorption applications. This article reports the synthesis of highly porous sulfur-doped carbon from thiophene using an in situ self-doping strategy followed by KOH activation. A series of highly porous sulfur-containing carbon materials with high surface area and pore volume were prepared through variation of activation temperature from 600 C to 900 C and applied as supercapacitor electrodes in alkaline as well as neutral electrolyte and also as adsorbent for CO 2 , H 2 adsorption. The material prepared at 800 C presented the highest electrochemical performance with a specific capacitance of 300 F g À1 at 1 A g À1 in 6 M KOH because of its high surface area and pore volume. The presence of oxidized sulfur functionality, high surface area, and micro-mesoporous structure were the responsible factors for enhanced storage of gases like CO 2 and H 2 . The functionalized carbon showed a good H 2 uptake value of 2.8 wt% under 1 bar pressure at 77 K. CO 2 uptake capacities were found to be 5.6 and 3.3 mmol g À1 at 1 bar pressure under the temperature of 273 and 298 K, respectively with a good CO 2 /N 2 selectivity of 14.36 and CO 2 /CH 4 selectivity of 2.53. This report presents a promising porous sulfur-doped carbon material for cost-effective and efficient gas adsorption and energy storage systems.

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“…As novel porous carbon materials, hierarchically porous biochars (HPBs) with controlled porosities and carbon frameworks with hierarchical porosity, namely, mesopores in combination with macropores or micropores, are highly desirable due to their unique structural features 85,86 . Because of the hierarchically porosities, abundant surface functional groups and large BET surface, HPBs have great potentials to be utilized in environment and energy area, such as catalyst, polluted soil and water amendment, supercapacitor, and fuel‐cell systems.…”

Section: Heterogeneous Catalytic Systemmentioning

confidence: 99%

Catalytic valorization of lignocellulosics: from bulk biofuels to value‐added chemicals

Zhang

Yu²,

Sheng

et al. 2021

Biofuels Bioprod Bioref

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Lignocellulose is a key starting material for the production of biofuels, biochemicals, and biomaterials. This review discusses various catalytic systems, including homogeneous and heterogeneous catalytic systems, for biomass valorization. Different strategies of biomass‐derived catalyst systems for value‐added chemicals are evaluated. Novel strategies for using biomass‐derived carbon‐based catalysts are proposed as a potential way to make the valorization process economically viable. This review also provides a comprehensive assessment of the fabrication of biomass‐derived carbon as catalytic support for biorefinery applications and discussion about mechanism of the synergistic catalytic effect between the biochar and catalyst. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd

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Green Synthesis of Nitrogen-doped Porous Carbon Derived from Rice Straw for High-performance Supercapacitor Application

Cited by 86 publications

References 61 publications

B, O and N Codoped Biomass-Derived Hierarchical Porous Carbon for High-Performance Electrochemical Energy Storage

B, O and N Codoped Biomass-Derived Hierarchical Porous Carbon for High-Performance Electrochemical Energy Storage

Synthesis of sulfur‐doped porous carbon for supercapacitor and gas adsorption applications

Catalytic valorization of lignocellulosics: from bulk biofuels to value‐added chemicals

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