High Rate Performing in Situ Nitrogen Enriched Spherical Carbon Particles for Li/Na-Ion Cells

Vadivel, Selvamani; Gopi, Sivalingam; Venkatachalam, R.; Kathiresan, Murugavel; Suryanarayanan, V.; Velayutham, D.; Gopukumar, S.

doi:10.1021/acsami.7b10882

Cited by 30 publications

(20 citation statements)

References 54 publications

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“…They have emerged as unique porous polymers with open framework structures, high porosity, and tunable molecular design to integrate predefined molecular functionalities. The past decade has witnessed the flourishing of various methods to obtain such porous polymers and their applications as precursors of well‐defined porous carbons via direct carbonization . For example, hollow carbon nanosphere was prepared from imine‐linked hollow spherical porous organic frameworks .…”

Section: Precursors For Porous Carbonsmentioning

confidence: 99%

Porous Polymers as Multifunctional Material Platforms toward Task‐Specific Applications

et al. 2018

Advanced Materials

375

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have triggered serious threats to the survival and development of mankind. Consequently, exploring novel materials with task-specific applications is of fundamental importance for the sustainable development of economy and society. The burgeoning progress of nanomaterials in recent years has demonstrated that porosity is one of the essential factors in determining material properties for possible breakthroughs in their applications. Therefore, porous materials are playing important roles in many well-established applications and emerging technologies for challenging social and economic issues due to their intrinsic characteristics of large surface areas, open channels, and the possible control over the pore environment. According to International Union of Pure and Applied Chemistry, the pores of porous materials are classified into three categories by their pore sizes: micropores are smaller than 2 nm, mesopores are in the range of 2-50 nm, and macropores are larger than 50 nm. [1] Their pore walls include the organic skeleton (e.g., porous polymers, organic porous cages, and supramolecular organic frameworks), the inorganic skeleton (e.g., zeolites, porous carbons, and mesoporous silica), and the hybrid skeleton (e.g., metal-organic frameworks (MOFs)).Among the developed porous materials, porous polymers have attracted an increasing level of research interest owing to their potential to integrate the advantages of both porous materials and polymers. [2,3] Table 1 lists the characteristic structural features and properties of porous polymers, and gives a systematic comparison to other typical porous materials, such as zeolites, porous carbons, and MOFs. Porous polymers, zeolites, porous carbons, and MOFs share a number of features such as high permanent porosities, large surface areas, and designable pores and voids. However, they are different in several important aspects. The major advantages of porous polymers over many other porous materials are their chemical diversity and easy processability. Compared to zeolites and porous carbons, the synthesis of porous polymers is generally more versatile and can be approached in a way that conforms to the concept of rational materials design. Similar to MOFs, porous polymers inherit the excellent chemical and physical tunability afforded by the versatility of organic chemistry. Furthermore, Exploring advanced porous materials is of critical importance in the development of science and technology. Porous polymers, being famous for their all-organic components, tailored pore structures, and adjustable chemical components, have attracted an increasing level of research interest in a large number of applications, including gas adsorption/storage, separation, catalysis, environmental remediation, energy, optoelectronics, and health. Recent years have witnessed tremendous research breakthroughs in these fields thanks to the unique pore structures and versatile skeletons of porous polymers. Here, recent milestones in the diverse applications of porous polymers are presented, ...

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Section: Precursors For Porous Carbonsmentioning

confidence: 99%

Porous Polymers as Multifunctional Material Platforms toward Task‐Specific Applications

et al. 2018

Advanced Materials

375

245

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“…Our intention here is to prepare the low-crystalline 2D structures in both lateral and vertical directions to study the exfoliation behavior. Although amorphous states were observed in frameworks and layered materials [26][27][28][29][30][31][32][33] , the amorphous nature was not applied to the exfoliation. A recent report shows that grafting of bulky alkyl chains on the layer of a COF induced smooth exfoliation into the nanosheets 34 .…”

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confidence: 99%

Amorphous 2D materials containing a conjugated-polymer network

et al. 2019

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Two-dimensional materials, such as layered compounds and nanosheets, have attracted interest for their characteristic structures and properties. If layered materials containing functional organic molecules are synthesized, designed nanosheets can be obtained by exfoliation. Here we show the design and synthesis of an amorphous organic layered material containing a conjugated-polymer network, its exfoliation into nanosheets, and their applications. Copolymerization of benzoquinone and pyrrole generates random stacks of the conjugated polymer layers through successive CC bond formation and pericyclic reaction under mild conditions at 60°C. The amorphous organic layered materials are efficiently exfoliated into nanosheets in 44.6% after 1 h. The nanosheets are used as a metal-free electrocatalyst for hydrogen evolution reaction with the overpotential 0.28 V (vs. RHE). The present approach may be applied to the design of functional nanosheets with graphenelike structures under mild conditions.

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“…The G band in the Raman active mode is referred to a two-dimensional highly crystalline network structure. The I G / I D band intensity is inversely proportional to the degree of turbostratic disorder, and the I G / I D graphitic carbon was found to be 1.2 signifying that the carbon structure mostly existed in the well-ordered sp 2 form ref . The sample displays a low I G / I D ratio, presenting the high graphitization …”

Section: Resultsmentioning

confidence: 97%

Lignin-Derived Carbon-Coated Functional Paper for Printed Electronics

Altay

Aksoy

Banerjee

et al. 2021

ACS Appl. Electron. Mater.

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Next-generation printed electronics is required to be of high performance, cost-effective, multifunctional, sustainable, and environmentally benign. Herein, we report the manufacturing of a flexible carbon-coated paper for printed electronics ensuring the abovementioned requirements. The multifunctional carboncoated substrate is achieved by employing copy paper, cellulose nanofibers (CNFs), and lignin-derived graphitic carbon as a base substrate, binder, and conductive pigment, respectively, using the scalable and simple Mayer rod coating and calendering methods. The pressure applied by the calendering led to a 96% decrease in electrical resistance for the carbon-coated paper. Wettability analysis revealed that the carbon layer is hydrophilic and capable of hydrogen bonding. The dielectric constant is obtained to be an order of magnitude less than that of the copy paper, indicating that the CNF binder between the carbon particles impedes the polarization mechanism. The impedance is measured as frequency-dependent and capacitive. The resistance, impedance, and dielectric values suggest that the carbon-coated paper is favorable for capacitive applications. Fabricating the flexible substrate with the biobased binder and conductive pigment introduces a significant step in sustainable and environmentally friendly printed electronics for future flexible capacitors, sensors, and wearable devices, especially for the applications where end-of-life disposal needs to be sustainable.

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High Rate Performing in Situ Nitrogen Enriched Spherical Carbon Particles for Li/Na-Ion Cells

Cited by 30 publications

References 54 publications

Porous Polymers as Multifunctional Material Platforms toward Task‐Specific Applications

Porous Polymers as Multifunctional Material Platforms toward Task‐Specific Applications

Amorphous 2D materials containing a conjugated-polymer network

Lignin-Derived Carbon-Coated Functional Paper for Printed Electronics

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