Bio-Based Carbon Materials for High-Performance Supercapacitors

Li, Penghui; Yang, Chi; Wu, Caiwen; Jiang, Bo; Jin, Yongcan; Wu, Wenjuan

doi:10.3390/nano12172931

Cited by 21 publications

(8 citation statements)

References 63 publications

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“…Moreover, the energy densities of CBPC also outperformed some that had been reported (8.6 Wh kg –1 @ 250 W kg –1 ) (Table S3). − In addition, the specific capacitance just slightly decreased after 10,000 cycles, which retained 93% in initial capacitance and nearly 100% in Coulombic efficiency at 5 A g –1 (Figure h).…”

Section: Resultsmentioning

confidence: 94%

Dual-Salt-Induced Hierarchical Porous Structure in a Carbon Sheet for High Performance Supercapacitors

Feng

Guo

et al. 2023

Langmuir

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Porous carbon, one of the characteristic materials for electrochemical energy storage devices, has been paid wide-ranging attention. However, balancing the reconcilable mesopore volume with a large specific surface area (SSA) was still a challenge. Herein, a dual-salt-induced activation strategy was developed to obtain a porous carbon sheet with ultrahigh SSA (3082 m 2 g −1 ), desirable mesopore volume (0.66 cm 3 g −1 ), nanosheet morphology, and high surface O (7.87%) and S (4.0%) content. Hence, as a supercapacitor electrode, the optimal sample possessed a high specific capacitance (351 F g −1 at 1 A g −1 ) and excellent rate performance (holding capacitance up to 72.2% at 50 A g −1 ). Furthermore, the assembled zinc-ion hybrid supercapacitor also exhibited superior reversible capacity (142.7 mAh g −1 at 0.2 A g −1 ) and highly stable cycling (71.2 mAh g −1 at 5 A g −1 after 10,000 cycles with retention of 98.9%). This work was delivered a new possibility for the development of coal resources for the preparation of high performance porous carbon materials.

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Section: Resultsmentioning

confidence: 94%

Dual-Salt-Induced Hierarchical Porous Structure in a Carbon Sheet for High Performance Supercapacitors

Feng

Guo

et al. 2023

Langmuir

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“…Finally, the O/N/S co-doped porous carbon material was obtained. When the carbonization temperatures were 700 • C, they were labeled SNC, and the undoped lignin was NC [28]. SNC was chosen as the adsorbent material, and NC was used as the control group.…”

Section: Synthesis Of Adsorbent Materialsmentioning

confidence: 99%

“…The specific surface area and pore size distribution of SNC were calculated by measuring the nitrogen adsorption-desorption isotherms using Brunner-Emmett-Taylor analysis (BET, QUADRASORB-EVO, Quantachrome Instruments, Boynton Beach, FL, USA). The physical structure of SNC is shown in the Supplementary Materials Figure S1 [28].…”

Section: Characterizationmentioning

confidence: 99%

“…Hydrogen bonding connections and π-π stacking also exist between MB and SNC. In addition, SNC has a high specific surface area (511 m 2 /g, Figure 8i), so there will be pore filling [28]. In summary, the mechanisms of Pb 2+ adsorption via SNC include ion exchange, complexation, and electrostatic interaction, and the mechanisms of MB adsorption include π-π conjugation, pore filling, hydrogen bonding, and electrostatic attraction.…”

Section: Adsorption Mechanism and Physical Properties Of Mb And Pb 2+...mentioning

confidence: 99%

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Polyaniline as a Nitrogen Source and Lignosulfonate as a Sulphur Source for the Preparation of the Porous Carbon Adsorption of Dyes and Heavy Metal Ions

Wu,

Li,

et al. 2023

Polymers

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Using agricultural and forestry wastes as raw materials, adsorbent materials were prepared for dye adsorption in wastewater, which can minimize the environmental load and fully realize sustainability by treating waste with waste. Taking lignosulfonate as a raw material, due to its molecular structure having more reactive groups, it is easy to form composite materials via a chemical oxidation reaction with an aniline monomer. After that, using a sodium lignosulfonate/polyaniline composite as the precursor, the activated high-temperature pyrolysis process is used to prepare porous carbon materials with controllable morphology, structure, oxygen, sulfur, and nitrogen content, which opens up a new way for the preparation of functional carbon materials. When the prepared O-N-S co-doped activated carbon materials (SNC) were used as adsorbents, the adsorption study of cationic dye methylene blue was carried out, and the removal rate of SNC could reach up to 99.53% in a methylene blue solution with an initial concentration of 100 mg/L, which was much higher than that of undoped lignocellulosic carbon materials, and the kinetic model conformed to the pseudo-second-order kinetic model. The adsorption equilibrium amount of NC (lignosulfonate-free) and SNC reached 478.30 mg/g and 509.00 mg/g, respectively, at an initial concentration of 500 mg/L, which was consistent with the Langmuir adsorption isothermal model, and the adsorption of methylene blue on the surface of the carbon material was a monomolecular layer. The adsorption of methylene blue dye on the carbon-based adsorbent was confirmed to be a spontaneous and feasible adsorption process by thermodynamic parameters. Finally, the adsorption of SNC on methylene blue, rhodamine B, Congo red, and methyl orange dyes were compared, and it was found that the material adsorbed cationic dyes better. Furthermore, we also studied the adsorption of SNC on different kinds of heavy metal ions and found that its adsorption selectivity is better for Cr3+ and Pb2+ ions.

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“…The mesopores in particular improve access to the electrolyte, ensuring effective use of the active sites in the electrode. This results in high-power performance in supercapacitors by increasing charge storage abilities and reducing the internal resistance in the carbon-based electrodes [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of High-Performance Asymmetric Supercapacitors Using Rice Husk-Activated Carbon and MnFe2O4 Nanostructures

et al. 2023

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To meet the growing demand for efficient and sustainable power sources, it is crucial to develop high-performance energy storage systems. Additionally, they should be cost-effective and able to operate without any detrimental environmental side effects. In this study, rice husk-activated carbon (RHAC), which is known for its abundance, low cost, and excellent electrochemical performance, was combined with MnFe2O4 nanostructures to improve the overall capacitance of asymmetric supercapacitors (ASCs) and their energy density. A series of activation and carbonization steps are involved in the fabrication process for RHAC from rice husk. Furthermore, the BET surface area for RHAC was determined to be 980 m2 g−1 and superior porosities (average pore diameter of 7.2 nm) provide abundant active sites for charge storage. Additionally, MnFe2O4 nanostructures were effective pseudocapacitive electrode materials due to their combined Faradic and non-Faradic capacitances. In order to assess the electrochemical performance of ASCs extensively, several characterization techniques were employed, including galvanostatic charge –discharge, cyclic voltammetry, and electrochemical impedance spectroscopy. Comparatively, the ASC demonstrated a maximum specific capacitance of ~420 F/g at a current density of 0.5 A/g. The as-fabricated ASC possesses remarkable electrochemical characteristics, including high specific capacitance, superior rate capability, and long-term cycle stability. The developed asymmetric configuration retained 98% of its capacitance even after 12,000 cycles performed at a current density of 6A/g, demonstrating its stability and reliability for supercapacitors. The present study demonstrates the potential of synergistic combinations of RHAC and MnFe2O4 nanostructures in improving supercapacitor performance, as well as providing a sustainable method of using agricultural waste for energy storage.

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Bio-Based Carbon Materials for High-Performance Supercapacitors

Cited by 21 publications

References 63 publications

Dual-Salt-Induced Hierarchical Porous Structure in a Carbon Sheet for High Performance Supercapacitors

Dual-Salt-Induced Hierarchical Porous Structure in a Carbon Sheet for High Performance Supercapacitors

Polyaniline as a Nitrogen Source and Lignosulfonate as a Sulphur Source for the Preparation of the Porous Carbon Adsorption of Dyes and Heavy Metal Ions

Fabrication of High-Performance Asymmetric Supercapacitors Using Rice Husk-Activated Carbon and MnFe2O4 Nanostructures

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