Microporous carbon derived from anthracite as supercapacitor electrodes with commercial level mass loading

Wang, Kun; Qu, Xiaoxiao; Huang, Guangxu; Xing, Baolin; Fan, Yufang; Zhang, Chuanxiang; Cao, Yijun

doi:10.1016/j.est.2021.103200

Cited by 33 publications

(8 citation statements)

References 52 publications

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“…While there is no detectable D band in coconut shell-based AC because of its amorphous structure, there is a weak G band at about 1636 cm –1 , indicating the existence of numerous oxygen-containing surface functional groups. , On the other hand, coal-derived AC and mixed-blend AC have two discrete peaks at approximately 1342 and 1350 cm –1 (D band) and 1612 and 1620 cm –1 (G band), respectively. The G band is typically connected to a graphite crystal lattice (sp 2 C/CC), while the D band is generally networked to a turbostratic framework (sp 3 C/C–C). ,, …”

Section: Resultsmentioning

confidence: 99%

“…The G band is typically connected to a graphite crystal lattice (sp 2 C/C�C), while the D band is generally networked to a turbostratic framework (sp 3 C/C−C). 18,31,46 A small percentage of the ashes (inorganic contents) from the raw materials, such as low-grade coal and coconut shell (waste biomass), are found in synthesized activated carbon. The following are the most crucial properties of ashes: (1) The wettability of the substance is significantly impacted by the ash present in the activated carbon.…”

Section: Crystallographic Analysis Of the Electrodementioning

confidence: 99%

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Blending of Activated Low-Grade Coal Powder with Coconut Shell Waste for Supercapacitor Applications

et al. 2022

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Activated carbons (ACs) are the key components for supercapacitors due to their several advantages including abundant availability, low cost, ease of fabrication, and controllable physicochemical properties. In recent times, the investigation on the relationship between supercapacitor performances and the morphology, texture, and dimensions of different types of activated carbons is becoming essential to optimize the best energy storage devices. The main objective of the current study is to create an improved activated carbon material by blending low-grade coal powder (subbituminous rank available in Northeast India) and waste coconut shell-based activated carbon at different weight ratios to use as indigenous supercapacitor electrode materials. The mixed-blend improved ACs exhibit excellent electrochemical performance (specific capacitance of 251.67 F g −1 at 0.5 A g −1 ) as compared to the commercially available AC sample. The prototype supercapacitor (45.6 cm 2 pouch cell configuration) fabricated by using the blended coal-and coconut shell-based activated carbons shows an estimated capacitance of ∼30 F at 2.7 V in an organic electrolyte (1.5 M TEABF 4 in ACN) with cellulose paper-based separators (TF40-30; NKK). It was also observed that the fabricated prototype supercapacitor is capable of lighting an LED (32 mW) for an entire hour, demonstrating a promising future in high-performance and low-cost energy storage technologies.

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Section: Resultsmentioning

confidence: 99%

Section: Crystallographic Analysis Of the Electrodementioning

confidence: 99%

Blending of Activated Low-Grade Coal Powder with Coconut Shell Waste for Supercapacitor Applications

et al. 2022

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“…Unfortunately, the low carbon yield, poor electrical conductivity, and high cost of these carbon precursors greatly limit the practical application in supercapacitors. Coal is considered to be a hopeful material candidate because of its high carbon content, convenience of availability, and rich source. − In fact, from the microstructure aspect of coals, there are strong interactions between the ordered aromatic hydrocarbons and the unordered alkyl functional groups, which greatly limits the structural tunability of coal-based PCs. , Many researchers utilize the mixed acids to break the strong interaction between coal molecules for preparing oxidized coal (OC). − However, there has been little research for the preparation of coal-based HPCs by the preoxidation treatment. Thus, the development of a simple method to prepare coal-based HPCs with a large SSA and abundant mesopores is highly desirable for high performance supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

“…25−27 In fact, from the microstructure aspect of coals, there are strong interactions between the ordered aromatic hydrocarbons and the unordered alkyl functional groups, which greatly limits the structural tunability of coal-based PCs. 28,29 Many researchers utilize the mixed acids to break the strong interaction between coal molecules for preparing oxidized coal (OC). abundant mesopores is highly desirable for high performance supercapacitors.…”

Section: ■ Introductionmentioning

confidence: 99%

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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“…Supercapacitors, including electric double-layer capacitors (EDLCs) and pseudocapacitors, have garnered continuous attention as an efficient energy storage system due to their higher power density, superior rate performance, longer cycle life, and a wider range of applications, compared with other energy storage systems [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. In the material systems, electrodes play an important role in determining electrochemical performance [ 9 , 10 , 11 , 12 , 13 ]. Activated carbons (ACs) have been used as a conventional material for EDLC electrodes because of their intrinsic characteristic properties, such as high specific surface area, developed pore structure, and suitable surface chemical state [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

A Simple Route to Produce Highly Efficient Porous Carbons Recycled from Tea Waste for High-Performance Symmetric Supercapacitor Electrodes

Kang

Lai

et al. 2022

Molecules

Self Cite

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High-performance porous carbons derived from tea waste were prepared by hydrothermal treatment, combined together with KOH activation. The heat-treatment-processed materials possess an abundant hierarchical structure, with a large specific surface of 2235 m2 g−1 and wetting-complemental hydrophilicity for electrolytes. In a two-electrode system, the porous carbon electrodes’ built-in supercapacitor exhibited a high specific capacitance of 256 F g−1 at 0.05 A g−1, an excellent capacitance retention of 95.4% after 10,000 cycles, and a low leakage current of 0.014 mA. In our work, the collective results present that the precursor crafted from the tea waste can be a promising strategy to prepare valuable electrodes for high-performance supercapacitors, which offers a practical strategy to recycle biowastes into manufactured materials in energy storage applications.

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Microporous carbon derived from anthracite as supercapacitor electrodes with commercial level mass loading

Cited by 33 publications

References 52 publications

Blending of Activated Low-Grade Coal Powder with Coconut Shell Waste for Supercapacitor Applications

Blending of Activated Low-Grade Coal Powder with Coconut Shell Waste for Supercapacitor Applications

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

A Simple Route to Produce Highly Efficient Porous Carbons Recycled from Tea Waste for High-Performance Symmetric Supercapacitor Electrodes

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