Biomass derived Nitrogen, Sulphur, and Phosphorus self-doped micro-meso porous carbon for high-energy symmetric supercapacitor – With a detailed study of the effect of different current collectors

Nanda, Om Priya; Badhulika, Sushmee

doi:10.1016/j.est.2022.106042

Cited by 39 publications

(5 citation statements)

References 19 publications

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“…Due to the superior outcome of EMAC-700 as compared to EMAC-800, the optimized EMAC-700 was used for subsequent studies. This material has also been recently reported from our lab …”

Section: Experimental Sectionmentioning

confidence: 62%

“…Though activated carbons have a high surface area that undergoes fast adsorption–desorption of charges and results in high power density, they do not yield good energy density. In this context, to enhance the capacitive effect, heteroatom doping has been introduced, which induces more defects and improves surface wettability, thereby resulting in improved energy density. , For EDLC application, numerous biowaste sources such as food waste, corn husk, bamboo waste, sugarcane bagasse, and so forth are already being used as a source for preparing activated carbon …”

Section: Introductionmentioning

confidence: 99%

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Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

et al. 2023

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For high-energy-density supercapacitors, two-dimensional (2D) MXenes are being increasingly explored due to their inherent conductivity and excellent chemical properties. However, MXenes failed to achieve high power density and exceptional stability. Addressing this, we report the fabrication of an asymmetric supercapacitor with nickel MXene (cathode) and nitrogen (N), sulfur (S), and phosphorus (P) self-doped biomassderived activated carbon (anode). Detailed structural and chemical characterization studies reveal layered nanosheets in NiMX caused due to solvothermal etching cum exfoliation and unique micro− mesopore distribution in the optimized Euphorbia milii plant leafderived heteroatom self-doped activated carbon (EMAC-700) because of KOH activation. NiMX and EMAC-700 delivered high capacitances of 474.3 and 575.8 F/g, respectively, at 1 A/g with a 6 M KOH electrolyte. This is attributed to the pseudonature of NiMX and the presence of heteroatoms and the large surface area (2349 m 2 /g) of EMAC-700, facilitating fast electrolytic ion transfer. Finally, an asymmetric device with NiMX//EMAC configuration in 6 M KOH delivered a 152.6 F/g cell capacitance at 0.5 A/g under 0−1.5 V. Additionally, an ultrahigh energy density of 47.6 W h/kg at a 375 W/kg power density was achieved along with an 81.7% capacitance retention after 30,000 cycles at 15 A/g, signifying its potential for next-generation energy storage applications.

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“…Due to the superior outcome of EMAC-700 as compared to EMAC-800, the optimized EMAC-700 was used for subsequent studies. This material has also been recently reported from our lab …”

Section: Experimental Sectionmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

et al. 2023

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“…Both type-I and type-IV behaviors were seen in the adsorption–desorption isotherms, with a rapid increase in adsorption occurring at a relatively low pressure ( P / P 0 0.01). This suggests the presence of mesopores (as shown by hysteresis, H4) and supermicropores (pore size, 2 nm) . The surface area was found to be 34.342 m 2 /g, which is high, and the pore volume was found to be 0.109 cm 3 /g.…”

Section: Resultsmentioning

confidence: 90%

Single-Pot Solvothermal Synthesis of Single-Crystalline Nickel–Metal Organic Framework Nanosheets for Direct Iron Fuel Cell Applications

Ravipati,

Durai,

Badhulika

2023

ACS Appl. Energy Mater.

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The usage of iron leads to the generation of large quantities of scrap iron, which is hazardous to health and causes environmental pollution. Recycling techniques are expensive and involve high energy consumption. Instead of recycling, scrap iron can be used as an alternative potential source for fuel cell applications. Here, we report the synthesis of a single-crystalline nickel-based MOF (Ni-MOF), via a single-pot solvothermal technique, as an electrocatalyst to produce hydrogen from scrap iron. Detailed characterization reveals the nanosheet morphology of the Ni-MOF obtained by FESEM; at the same time Ni-MOF formation is confirmed through the XRD spectrum. The as-synthesized Ni-MOF is deposited on nickel foam (NF) and used as an electrocatalyst (Ni-MOF/NF) which exhibits a peak current density of 8.8 A/g (scrap) and response toward hydrogen production at an onset potential of 0.5 V (vs Hg/HgO). The improved performance of the Ni-MOF/NF electrode is ascribed to the high catalytic activity of Ni-MOF owing to the multiple oxidation states of Ni (i.e., Ni2+/3+); the reversible transformation between +2 and +3 oxidation states results in the redox peaks of the catalytic reaction; and the organic ligands in the MOF structure help in improving the conductivity and pore size of the material. The Ni-MOF/NF electrode exhibits outstanding stability with ∼88.1 and ∼72.9% capacity retention after 100,000 and 50,000 s for scrap and iron metal powder, respectively. This proves that the theickel metal–organic framework coated on nickel foam (Ni-MOF/NF) electrocatalyst is an outstanding material for iron source-based fuel cell applications.

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“…[ 10 ] In recent years, absorption technologies have attracted considerable attention for removing paint from industrial sectors due to their low costs, single‐step operation, simple design, environmental friendliness, economic feasibility, and high efficiency. Until now, purification, such as activated carbon [ 11 ] or zeolite, [ 12 ] banana and lemon peel, [ 13 ] polymer resins, [ 14 ] silica nanoparticles, [ 15 ] graphene, [ 16 ] clay, and metal–organic frameworks (MOFs) have received substantial interest as an adsorbent in the adsorption field. [ 17 ] In recent years, researchers have been increasingly interested in MOFs, which possess ultra‐high porosity, porous volume, and topological structure enrichment.…”

Section: Introductionmentioning

confidence: 99%

Study on MoS₂/Fe‐MIL‐88NH₂ Transition metal dichalcogenide/Metal‐organic framework as a novel composite for highly adsorption of methylene blue dye from aqueous solutions

Karami

Noori

Bayat

et al. 2023

Applied Organom Chemis

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The present study proposes a unique MoS 2 /Fe-MIL-88NH 2 composite as an adsorbent for methylene blue (MB) from aqueous solutions for the first time. Different physicochemical techniques are utilized to characterize (metalorganic framework [MOF]/transition metal dichalcogenide [TMD]), including elemental analysis, Fourier transform infrared (FT-IR), field emission scanning electron microscopy (FE-SEM), zeta potential (ζ) measurement, and Brunauer-Emmett-Teller (BET) theory. The effects of different process factors on MB dye adsorption by composite are examined, including initial dye concentration, adsorbent loading, solution pH, temperature, and dye mixture. Various process parameters encompassing the initial dye concentration, adsorbent loading, solution pH, temperature, and mixture of dyes are investigated, and the equilibrium adsorption capacity towards MB is found up to 370 mg g À1 (when pH = 4.0, contact time is 90 min, and the adsorbent dose is 0.0068 mmol g À1 ). Experimental results reveal that the adsorption process is highly dependent on adsorbent dosage, initial MB concentration, and aqueous solution temperature. Equilibrium data are fitted onto Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich models expressing the MB adsorption phenomena. Moreover, the isotherm data fit Freundlich mathematical models with maximum dye adsorption of 370 mg g À1 . Sorption kinetics follows a pseudo-second-order model.

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Biomass derived Nitrogen, Sulphur, and Phosphorus self-doped micro-meso porous carbon for high-energy symmetric supercapacitor – With a detailed study of the effect of different current collectors

Cited by 39 publications

References 19 publications

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

Single-Pot Solvothermal Synthesis of Single-Crystalline Nickel–Metal Organic Framework Nanosheets for Direct Iron Fuel Cell Applications

Study on MoS₂/Fe‐MIL‐88NH₂ Transition metal dichalcogenide/Metal‐organic framework as a novel composite for highly adsorption of methylene blue dye from aqueous solutions

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Biomass derived Nitrogen, Sulphur, and Phosphorus self-doped micro-meso porous carbon for high-energy symmetric supercapacitor – With a detailed study of the effect of different current collectors

Cited by 39 publications

References 19 publications

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

Single-Pot Solvothermal Synthesis of Single-Crystalline Nickel–Metal Organic Framework Nanosheets for Direct Iron Fuel Cell Applications

Study on MoS2/Fe‐MIL‐88NH2 Transition metal dichalcogenide/Metal‐organic framework as a novel composite for highly adsorption of methylene blue dye from aqueous solutions

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Study on MoS₂/Fe‐MIL‐88NH₂ Transition metal dichalcogenide/Metal‐organic framework as a novel composite for highly adsorption of methylene blue dye from aqueous solutions