Interconnected mesoporous carbon sheet for supercapacitors from low-cost resources

Wang, Xiaoting; Ma, Hongwen; Zhang, Hebao; Yu, Mei; He, Xiaojun; Wang, Yong

doi:10.1016/j.matlet.2015.05.157

Cited by 18 publications

(6 citation statements)

References 12 publications

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“…This value is slightly smaller than that of the porous carbon obtained from ZnCl 2 activation of rice husk and starch-derived mesoporous carbons prepared by the template method . However, the S BET , V t , and the percentage of mesopores are considerably higher than those of the reported porous carbon prepared by the activation of coal tar pitch with surfactant (CTAB) and CaCO 3 , respectively . In addition, it is noted that the ZnCl 2 –S 122 sample only shows microporous structure (as shown in Figure S4).…”

Section: Results and Discussionmentioning

confidence: 77%

“…54 However, the S BET , V t , and the percentage of mesopores are considerably higher than those of the reported porous carbon prepared by the activation of coal tar pitch with surfactant (CTAB) and CaCO 3 , respectively. 55 In addition, it is noted that the ZnCl 2 −S 122 sample only shows microporous structure (as shown in Figure S4). The KOH− S 122 sample shows a high specific surface area of 2210 m 2 g −1 ; however, it displays a negligible adsorption capacity at the middle and high pressure range in the isotherm (Figure S5).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Promising Nitrogen-Rich Porous Carbons Derived from One-Step Calcium Chloride Activation of Biomass-Based Waste for High Performance Supercapacitors

Liu

Deng

et al. 2015

ACS Sustainable Chem. Eng.

251

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It has long been demonstrated that KOH and ZnCl2 can be used as efficient chemical activation agents to prepare porous carbons. Herein, we develop a green activation method, that is, one-step calcium chloride (CaCl2) activation sugar cane bagasse with urea, for the preparation of nitrogen-rich porous carbons (NPCs). The nitrogen contents, specific surface areas, pore sizes, and specific capacitances of the obtained NPCs can be effectively tuned by adjusting the ratio of carbon precursor (sugar cane bagasse), nitrogen source (urea), and activation agent (CaCl2). The synthesized three-dimensional oriented and interlinked porous nitrogen-rich carbons (3D-NPCs) contain not only abundant porosities which can impose an advantage for ion buffering and accommodation, but also high nitrogen content in the carbons which can obviously increase the pseudocapacitance. Therefore, for the typical sample, obtained from pyrolysis of the mixture of sugar cane bagasse, urea, and CaCl2 in a mass ratio of 1:2:2 at 800 °C for 2 h under N2 atmosphere, shows a high specific capacitance, excellent rate capability (with 323 and 213 F g–1 at the discharge/charge current densities of 1 and 30 A g–1, respectively), and outstanding cycle performance (a negligible capacitance loss after 10 000 cycles at 5 A g–1).

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Section: Results and Discussionmentioning

confidence: 77%

Section: ■ Results and Discussionmentioning

confidence: 99%

Promising Nitrogen-Rich Porous Carbons Derived from One-Step Calcium Chloride Activation of Biomass-Based Waste for High Performance Supercapacitors

Liu

Deng

et al. 2015

ACS Sustainable Chem. Eng.

251

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“…Besides this crystalline structure, coal also has the amorphous form of nonaromatic carbon because of the presence of defective structured material. The polyaromatic framework in coal is similar to graphene’s sp 2 hybridization properties. ,, …”

Section: Coal-derived Activated Carbon For Electrochemical Energy Sto...mentioning

confidence: 94%

“…Coal is termed as primarily brown or black solid carbon-rich fossil fuels formed from algal remains or spores and the decomposition of humic coal, stratified sedimentary and higher plants . It is not only a source of energy but also an abundant natural resource for synthesizing carbonaceous materials. − Coal has an intermediate crystalline structure between amorphous carbon and graphitic state referred to as “turbostratic structure” . Besides this crystalline structure, coal also has the amorphous form of nonaromatic carbon because of the presence of defective structured material.…”

Section: Coal-derived Activated Carbon For Electrochemical Energy Sto...mentioning

confidence: 99%

Coal-Derived Activated Carbon for Electrochemical Energy Storage: Status on Supercapacitor, Li-Ion Battery, and Li–S Battery Applications

2021

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In this era of exponential growth in energy demand and its adverse effect on global warming, electrochemical energy storage systems have been a hot pursuit in both the scientific and industrial communities. In this regard, supercapacitors, Li-ion batteries, and Li–S batteries have evolved as the most plausible storage systems with excellent commercial adaptations. Intending to get the best performance from these systems, researchers all over the world have been engaging to develop various new methods for the synthesis of advanced carbon materials with a target of economical viability, abundance, low cost, and ease of preparation. Among them, activated carbon has proven to be an attractive electrode material due to its many advantageous properties such as a large surface area, high pore density, good conductivity, low cost, and good mechanical and chemical stability compared to other alternatives, such as high-cost graphene, carbon nanotubes, Mxenes, transition metal complexes, and conducting polymers. Among the numerous synthetic and biological resources that are used for the synthesis of activated carbon, coal/coal-like materials have found tremendous importance in recent times due to their relative abundance, extremely low cost, and excellent large-scale production possibilities. The present review attempts to collect all the significant innovations carried out for the use of cheap and economically viable coal-derived/-based activated carbon and its composites in supercapacitors, Li-ion batteries, and Li–S batteries and to critically evaluate their comparative performances. The progress in advanced three-dimensional printing technology for these energy storage applications is also discussed. The highlight of this review is also to assess the challenges that remain for the synthesis of high-performance electroactive-activated carbon materials from coal-based resources as alternative electrode materials, which would become promising candidates in the foreseeable future.

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“…These porogens decompose during the subsequent thermal treatments to leave pores that further increase the surface area [24].…”

mentioning

confidence: 99%

Supercapacitors utilizing electrodes derived from polyacrylonitrile fibers incorporating tetramethylammonium oxalate as a porogen

Perananthan

Bonso

2016

Carbon

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Thermally sensitive tetramethylammonium oxalate (TMAO) is incorporated as an in situ porogen into freestanding nonwoven nanofibers of polyacrylonitrile (PAN) produced by electrospinning. Supercapacitor electrode materials are prepared by a series of thermal treatments on these fibers, including stabilization followed by a single step carbonization and CO2 activation. The specific surface areas of the resultant carbon nanofibers (CNFs) are controlled by varying the amounts of TMAO in the precursor fibers. The electrochemical properties of the carbon nanofibers are characterized by cyclic voltammetry and galvanostatic charge-discharge tests. The highest surface area (2663 m2 g-1) and best electrochemical performance are obtained from PAN containing 0.1 wt% of TMAO (T10), which gives a maximum specific capacitance of 140 F g-1 at a scan rate of 10 mV s-1 in comparison to CNFs from PAN alone, which yielded only 90 F g-1. At a discharge current density of 1 A g-1, the obtained energy and power densities are 68 Wh kg-1 and 1.7 W kg-1, respectively, with capacitance retention of 80% after 1000 cycles. 1. Introduction: Electrochemical double layer capacitors (EDLC), also known as supercapacitors or ultracapacitors, are energy storage devices that store energy as a charge separation at the electrode-electrolyte interface. They have drawn considerable interest due to their higher power density than batteries and higher energy density than conventional capacitors. They also have excellent cycling stabilities due to their non-faradic and highly reversible energy storage mechanism [1]. EDLCs are seeing use as backup systems in consumer electronics and hybrid

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Interconnected mesoporous carbon sheet for supercapacitors from low-cost resources

Cited by 18 publications

References 12 publications

Promising Nitrogen-Rich Porous Carbons Derived from One-Step Calcium Chloride Activation of Biomass-Based Waste for High Performance Supercapacitors

Promising Nitrogen-Rich Porous Carbons Derived from One-Step Calcium Chloride Activation of Biomass-Based Waste for High Performance Supercapacitors

Coal-Derived Activated Carbon for Electrochemical Energy Storage: Status on Supercapacitor, Li-Ion Battery, and Li–S Battery Applications

Supercapacitors utilizing electrodes derived from polyacrylonitrile fibers incorporating tetramethylammonium oxalate as a porogen

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