Hierarchical porous carbon derived from coal tar pitch by one step carbonization and activation combined with a CaO template for supercapacitors

Ma, Fangwei; Jiang, Yuchen; Zhu, He; Cui, Xin; Liu, Zeyi; Liu, Yifu; Wan, Jiafeng

doi:10.1039/d2nj00433j

Cited by 25 publications

(15 citation statements)

References 60 publications

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“…The same observation as made using XPS, where the relative C % and O % did not vary (Table 2) despite higher amounts of KOH. Electrochemistry, 90 (7), 077004 (2022) Analysis of both C1s and O1s narrow spectra (Table S3) likewise show similar ratios for all deconvoluted peaks.…”

Section: Effect Of Koh and Mgomentioning

confidence: 77%

“…The list of experiments and their corresponding conditions are listed in Table 1. Electrochemistry, 90 (7), 077004 (2022)…”

Section: Synthesis Of Templated Activated Carbon (Tac)mentioning

confidence: 99%

“…The small degree of microporosity observed for TAC-KxM30, evidenced by BJH micropore volume (V micro ) at 0.18 cm 3 g ¹1 (Table S1) is likely the effect of carbonizing TAC-KxM30 at 800 °C, resulting in some micropore formation. Electrochemistry, 90 (7), 077004 (2022)…”

Section: Characterizationmentioning

confidence: 99%

“…Electrochemistry, 90 (7), 077004 (2022) phenol-formaldehyde resin, 44 thus showing that selectively inducing mesoporosity through templating in AC production as a whole is a good way to improve AC electrochemical specific capacitance. A study by Lin et al 45 on using nanosilica (SBA-15) as template and ZnCl 2 as the activating agent for AC reported a maximum specific capacitance similar to this research.…”

Section: Electrochemical Studiesmentioning

confidence: 99%

“…An alternative and more eco-friendly method is performing both carbonization and activation within one heat treatment cycle. 6,7 AC synthesized via one-step carbonization-activation has been reported to have nearly identical or had higher surface area than that of AC synthesized through the conventional two-step method. 8,9 Whether AC is synthesized via one-step or two-step, the addition of porogens to induce the desired pore structure is still required.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Facile Synthesis of Templated Activated Carbon from Cellulose Nanofibers and MgO Nanoparticles via Integrated Carbonization-activation Method as an Eco-friendly Supercapacitor

et al. 2022

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A green, rapid, and facile synthesis method of activated carbon was developed and optimized using 50 nm MgO nanoparticle (NP)-based pore templating in tandem with an integrated drying and carbonization-activation heat treatment. TEMPO-oxidized cellulose nanofibers (TOCN) were mixed with MgO NPs and KOH, freeze-dried, heat treated first at 350 °C then at 800 °C to get templated activated carbon. Selective pore formation by MgO and KOH resulting in the development of mesopores and micropores, respectively was confirmed. NPbased templating is confirmed to be viable even with continuous heat treatment, and does not affect any transformations during each heat treatment phase. Through optimization for the highest surface area and optimal hierarchical porosity, templated activated carbon had a high specific capacitance of 269 F g −1 at 0.5 A g −1 with 95.92 % cycle stability after 2000 charge-discharge cycles at 10 A g −1 .

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Section: Effect Of Koh and Mgomentioning

confidence: 77%

“…The list of experiments and their corresponding conditions are listed in Table 1. Electrochemistry, 90 (7), 077004 (2022)…”

Section: Synthesis Of Templated Activated Carbon (Tac)mentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Electrochemical Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Facile Synthesis of Templated Activated Carbon from Cellulose Nanofibers and MgO Nanoparticles via Integrated Carbonization-activation Method as an Eco-friendly Supercapacitor

et al. 2022

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Dual‐template synthesis of hierarchical porous carbon and its application in electrical double‐layer capacitors

Yuan

et al. 2022

Can J Chem Eng

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Hierarchical porous carbons (HPCs) with tailored pore structure were fabricated via direct carbonization of a precursor consisting of agar and acetates in an inert atmosphere. The agar served as the carbon source and curing agent, while potassium acetate and calcium acetate were used to create micropores and mesopores, respectively. The morphology and structural features of the HPCs were characterized, and the electrochemical properties were estimated in a three‐electrode system with 6 M KOH as the electrolyte. The resulting HPCs possess a developed pore structure and concentrated pore size distribution (focused at 0.4 and 4 nm), and exhibit typical electrical double‐layer capacitive behaviour. Specially, the HCP‐2 owns a large specific surface area of 1441.65 m2/g and excellent electrochemical properties, including a favourable specific capacitance (235 F/g at 1 A/g), good rate capability (capacitance retention rate of 88.1% at 20 A/g), and impressive long‐term cycling stability (90.6% retention of initial capacitance after 3000 cycles).

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An eco‐friendly Na‐ion battery utilizing biowaste‐derived carbon and birnessite with enhanced high voltage reaction

Ortiz,

Ma,

Luo

et al. 2024

EcoEnergy

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Trigonal birnessite (Na0.5MnO2·0.7H2O) with quasi‐hexagonal‐stacked particles is synthesized by a simple procedure. The MnO6 layers are expanded (ca. 7.1 Å as confirmed by HRTEM) by sodium ion and water molecules permitting the cyclability of the cathode up to 4.4 V without anionic redox effect. This particular phase exhibits sodium storage performance with 181.2 mA h g−1 reversible capacity, high Coulombic efficiency (99.8%), good rate performance (20–640 mA g−1), and 80% capacity retention over 200 cycles. X‐ray adsorption near‐edge structure (XANES) spectra at Mn‐k edge confirmed that the main redox component is Mn3+/Mn4+. An environmental‐friendly Na‐ion full cell is assembled with this cathode and biowaste‐derived carbon (obtained from trash of lemon peels) anode and provided ∼ 330 Wh kg−1 energy density (at the material's level) which is preserved at ∼71% over 200 cycles. Manganese, sodium, and carbon are cheap and eco‐friendly materials for practical energy storage eagerly sought after in the industry.

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Hierarchical porous carbon derived from coal tar pitch by one step carbonization and activation combined with a CaO template for supercapacitors

Abstract: Hierarchical porous carbon material (HPC) derived from coal tar pitch is synthesized through one-step carbonization and activation method using CaO as hard template. The influence of activator dosage, activation time...

Cited by 25 publications

References 60 publications

Facile Synthesis of Templated Activated Carbon from Cellulose Nanofibers and MgO Nanoparticles via Integrated Carbonization-activation Method as an Eco-friendly Supercapacitor

Facile Synthesis of Templated Activated Carbon from Cellulose Nanofibers and MgO Nanoparticles via Integrated Carbonization-activation Method as an Eco-friendly Supercapacitor

Dual‐template synthesis of hierarchical porous carbon and its application in electrical double‐layer capacitors

An eco‐friendly Na‐ion battery utilizing biowaste‐derived carbon and birnessite with enhanced high voltage reaction

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