Comprehensive Review on Nitrogen-Doped Graphene: Structure Characterization, Growth Strategy, and Capacitive Energy Storage

Li, Bofan; Zhang, Shuting; Cui, Chaojie; Qian, Weizhong; Ye, Jin

doi:10.1021/acs.energyfuels.2c03517

Cited by 13 publications

(5 citation statements)

References 127 publications

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“…Apparently, the present conversion technology could not only eliminate waste-containing cyano-organics or amino-organics but could also produce N-CNTs with a high doping ratio of N-species in situ. As indicated in refs − ,− , these N-CNTs would be attractive as electrodes of supercapacitors or as adsorbents with hydrophilic surface properties and excellent electrical conductivity.…”

Section: Resultsmentioning

confidence: 99%

Tandem Conversion of Cyano-/Amino-Organics into N-Doped Carbon Nanotubes and Harmless Off-Gas

Jiao,

Cui,

Wang

et al. 2023

ACS Omega

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We reported a new technology for transforming N-containing organic wastes (such as aniline, adiponitrile, and tar from preoxidized PAN fibers) into N-doped carbon nanotubes (N-CNTs) with nanosized iron or nickel catalysts in two consecutive reactors at 650–800 °C. Most of the reactants were converted, and N-CNTs in large amounts were produced in the first stage of the reactor, while the reactants could be completely removed in the second stage of the reactor. The doping content of N-species on CNTs easily approached 10–22 wt %, much higher than most of the earlier reported methods. The results were potentially useful for the treatment of toxic cyano-organics and the production of high-end products simultaneously.

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Section: Resultsmentioning

confidence: 99%

Tandem Conversion of Cyano-/Amino-Organics into N-Doped Carbon Nanotubes and Harmless Off-Gas

Jiao,

Cui,

Wang

et al. 2023

ACS Omega

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“…38 Nitrogen groups play a crucial role in improving supercapacitor performance. 39,40 A nitrogen functionality within the carbon lattice is known to be more stable compared to embedded oxygen functional groups. Besides improving the wettability and electrochemically active sites, the presence of nitrogen-containing compounds contributes to pseudocapacitive effects (e.g., pyridine, pyrrole) in (aqueous) supercapacitors.…”

Section: Scanning Electron Microscopy and Transmission Electron Micro...mentioning

confidence: 99%

Sweet Side Streams: Sugar Beet Pulp as Source for High-Performance Supercapacitor Electrodes

Selinger,

Meinander,

Wilson

et al. 2024

ACS Omega

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Valorization of the lignocellulosic side and waste streams is key to making industrial processes more efficient from both an economic and ecological perspective. Currently, the production of sugars from beets results in pulps in large quantities. However, there is a lack of promising opportunities for upcycling these materials despite their promising properties. Here, we investigate beet pulps from two different stages of the sugar manufacturing process as raw materials for supercapacitor electrodes. We demonstrate that these materials can be efficiently converted to activated, highly porous carbons. The carbons exhibit pore dimensions approaching the size of the desolvated K+ and SO4 2– ions with surface areas up to 2600 m2 g–1. These carbons were subsequently manufactured into electrodes, assembled in supercapacitors, and tested with environmentally friendly aqueous electrolytes (6 M KOH and 1 M H2SO4). Further analysis demonstrated the presence of capacitance-enhancing functionalities, and up to 193 and 177 F g–1 in H2SO4 and KOH, respectively, were achieved, which outperformed supercapacitors prepared from commercial YP80 F. Overall, our study suggests that side streams from sugar manufacturing offer a hidden potential for use in high-performance energy storage devices.

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“…), which renders N-doped graphene (N-G) as arguably one of the best options for developing graphene-based electrochemical materials. Moreover, through experimental, theoretical, and computational investigations, it has been demonstrated that the introduction of nitrogen atoms into the graphene structure generates electronically active sites, enabling the material to facilitate electrochemical activities [18][19][20][21][22][23][24]. Although the primary objective of N-G-based materials is to replace precious metal-based materials, like platinum group metals (PGMs), in electrochemical applications, significant improvements in various electrochemical parameters are still required at their current developmental stage to effectively utilize N-G materials in electrochemical energy systems.…”

Section: Introductionmentioning

confidence: 99%

N-Doped Graphene (N-G)/MOF(ZIF-8)-Based/Derived Materials for Electrochemical Energy Applications: Synthesis, Characteristics, and Functionality

Talukder,

Wang,

Nunna

et al. 2024

Batteries

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In recent years, graphene-type materials originating from metal–organic frameworks (MOFs) or integrated with MOFs have exhibited notable performances across various applications. However, a comprehensive understanding of these complex materials and their functionalities remains obscure. While some studies have reviewed graphene/MOF composites from different perspectives, due to their structural–functional intricacies, it is crucial to conduct more in-depth reviews focusing on specific sets of graphene/MOF composites designed for particular applications. In this review, we thoroughly investigate the syntheses, characteristics, and performances of N-G/MOF(ZIF-8)-based/derived materials employed in electrochemical energy conversion and storage systems. Special attention is given to realizing their fundamental functionalities. The discussions are divided into three segments based on the application of N-G/ZIF-8-based/derived materials as electrode materials for batteries, electrodes for electrochemical capacitors, and electrocatalysts. As electrodes for batteries, N-G/MOF(ZIF-8) materials can mitigate issues like an electrode volume expansion for Li-ion batteries and the ‘shuttle effect’ for Li-S batteries. As electrodes for electrochemical capacitors, these materials can considerably improve the ion transfer rate and electronic conductivity, thereby enhancing the specific capacitance while maintaining the structural stability. Also, it was observed that these materials could occasionally outperform standard platinum-based catalysts for the electrochemical oxygen reduction reaction (ORR). The reported electrochemical performances and structural parameters of these materials were carefully tabulated in uniform units and scales. Through a critical analysis of the present synthesis trends, characteristics, and functionalities of these materials, specific aspects were identified that required further exploration to fully utilize their inherent capabilities.

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Comprehensive Review on Nitrogen-Doped Graphene: Structure Characterization, Growth Strategy, and Capacitive Energy Storage

Cited by 13 publications

References 127 publications

Tandem Conversion of Cyano-/Amino-Organics into N-Doped Carbon Nanotubes and Harmless Off-Gas

Tandem Conversion of Cyano-/Amino-Organics into N-Doped Carbon Nanotubes and Harmless Off-Gas

Sweet Side Streams: Sugar Beet Pulp as Source for High-Performance Supercapacitor Electrodes

N-Doped Graphene (N-G)/MOF(ZIF-8)-Based/Derived Materials for Electrochemical Energy Applications: Synthesis, Characteristics, and Functionality

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