Highly monodisperse magnetite/carbon composite microspheres with a mesoporous structure as high-performance lithium-ion battery anodes

Lim, Hyung‐Seok; Kim, Daun; Hwang, Jun Ki; Kim, Yu Jeong; Sun, Yang Kook; Suh, Kyung‐Do

doi:10.1039/c5ra05732a

Cited by 8 publications

(3 citation statements)

References 22 publications

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“…‡ 6,[8][9][10][11][12][13][14][15] However, Fe 2 O 3 -based anodes suffer from pulverization and electrode cracking caused by large volume change ($200%) upon repetitive cycling reactions between Fe 2 O 3 and Li ions. [16][17][18][19][20][21][22][23] The low coulombic efficiency for the 1st cycle and the high polarization also limit Fe 2 O 3 as the anode material for LIBs. 24 To overcome these obstacles, Fe 2 O 3 nanostructures such as nanoparticles, 25 nanocubes, 26 nanorods, 27 nanoakes 28 and nanotubes 17 have been synthesized for LIBs in the initial stage, because these nanostructures could shorten the diffusion distances for Li + ions, [29][30][31] which can reduce polarization to some extent.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous iron oxide@carbon composites with low carbon content as high-performance anodes for lithium-ion batteries

Wan

Sha

et al. 2015

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Nanoporous iron oxide@carbon composites with low carbon content as high-performance anodes for lithium-ion batteries

Wan

Sha

et al. 2015

RSC Adv.

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“…Recently, the preparation of Fe 3 O 4 /C composites with fine nanostructure by the specific reaction between Fe 3þ and polymer carbon sources has attracted much attention. [34][35][36][37] For example, alginate can cross-link with polyvalent metal ions to form gels. [38,39] After drying and carbonization, the gels can turn into metal oxides/carbon with nano-sized particles.…”

mentioning

confidence: 99%

In Situ Ion–Exchange Synthesis of Fe₃O₄ Nanosheets with 3D Hierarchically Porous Carbon Frameworks for High‐Performance Energy Storage

Yan

Fang

et al. 2022

Energy Tech

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Since their commercialization in the 1990s, [1] lithium (Li)-ion batteries (LIBs) dominate the market for consumer electronics and electric vehicles because of their high-energy density and long cycle life. [2][3][4] However, the low power density of batteries gradually cannot meet the demands for faster charge/discharge ability with superior energy density in electric vehicles. [5] Thus, it is especially important to develop new electrode materials for LIBs with high-energy/power density, long cycle life, and low cost. In addition, the limited reserves of Li resources increase the LIB cost and hinder the development of existing energy-storage systems. [6,7] Another promising way is to find alternatives to Li, such as sodium (Na), which is almost three orders of magnitude higher than Li in reserves, and has relatively lower cost. [8][9][10] However, Na-ion batteries (NIBs) also have many problems, such as the lower negative redox potential and larger size of Na ions than those of Li ions. These make the performance of NIBs uncompetitive against that of LIBs. [11,12] Generally, electrode materials that can deliver high-energy/power density are strongly required for both LIBs and NIBs at present.High-energy density delivered at rapid charge/discharge rate requires the electrode materials to have 1) abundant redox reaction sites for charge storage and 2) fast internal solid-state ion-diffusion kinetics and high electronic conductivity. [4] However, most electrode materials with high theoretical capacities, such as Si, [13][14][15] Sn, [16,17] transitionmetal oxides (TMOs), [18][19][20][21][22][23] etc., usually undergo low electrical/ ionic conductivity or huge volume changes, which limits the battery performance. For instance, Fe 3 O 4 is a promising anode material for batteries due to its high theoretical capacity (926 mA h g À1 ), high reversibility, eco-friendliness, and low cost. However, this material tends to aggregate during fabrication and be pulverized during cycling, leading to a much lower actual capacity. [24,25] A strategy to address these problems is to create electrode materials with their active components controllable in size and morphology, and dispersing continuously and uniformly on an electrical conductive framework with a large number of internal channels for rapid ion transport. [26,27] Carbon frameworks are regarded as an optimal choice for composites with Fe 3 O 4 for LIBs or NIBs anodes due to the robust structure, good electrical/ionic conductivity, and low cost. To date, researchers have successfully developed many novel methods to prepare Fe 3 O 4 /carbon hybrids, such as etching method, [28] spontaneous deposition of metallic salts, [29] hydrothermal method, [30,31] and electrostatic spinning. [32,33] However, these methods involve complex preparation processes and are still far from commercial

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“…8,14,17,18 Notably, it has been shown that Fe 3 O 4 octahedra yielded a higher cycling performance as compared with that of cubes and cuboctahedra, thereby highlighting the importance of the exposed surface in dictating the observed electrochemical properties of as-prepared magnetite nanomaterials. 8 In essence, our overall strategy has been to fabricate consistent, standardized series of monodisperse motifs of colloidal magnetite nanocrystals [17][18][19][20][21][22][23][24][25][26][27][28] by carefully tuning size, shape, and chemical composition through meticulous parameter selection. 29 In so doing, we have concentrated on exploring the electrochemical activity of well-defined 0D and 2D structures of magnetite.…”

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confidence: 99%

Shape Dependence on the Electrochemistry of Uncoated Magnetite Motifs

Salvatore¹,

Vila²,

McGuire³

et al. 2022

J. Electrochem. Soc.

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Using a variety of synthetic protocols including hydrothermal and microwave-assisted methods, the morphology of as-prepared magnetite has been reliably altered as a means of probing the effect of facet variations upon the resulting electrochemical processes measured. In particular, motifs of magnetite, measuring ∼100 to 200 nm in diameter, were variously prepared in the form of cubes, spheres, octahedra, and plates, thereby affording the opportunity to preferentially expose either (111), (220), or (100) planes, depending on the geometry in question. We deliberately prepared these samples, characterized using XRD and SEM, in the absence of a carbonaceous surfactant to enhance their intrinsic electrochemical function. Herein, we present a direct electrochemical comparison of specifically modified shape morphologies possessing 3 different facets and their impact as electrode materials for Li-ion batteries. Our overall data suggest that the shapes exhibiting the largest deliverable capacities at various current densities incorporated the highest surface energy facets, such as exposed (220) planes in this study. The faceted nature of different morphologies highlighted a trend in electrochemistry of (220) > (111) > (100); moreover, the degree of aggregation and polydispersity in prepared samples were found to play key roles as well.

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Highly monodisperse magnetite/carbon composite microspheres with a mesoporous structure as high-performance lithium-ion battery anodes

Abstract: In this study, we propose a fabrication method for highly monodisperse magnetite/carbon (Fe3O4/C) composite microspheres with a mesoporous structure.

Cited by 8 publications

References 22 publications

Nanoporous iron oxide@carbon composites with low carbon content as high-performance anodes for lithium-ion batteries

Nanoporous iron oxide@carbon composites with low carbon content as high-performance anodes for lithium-ion batteries

In Situ Ion–Exchange Synthesis of Fe₃O₄ Nanosheets with 3D Hierarchically Porous Carbon Frameworks for High‐Performance Energy Storage

Shape Dependence on the Electrochemistry of Uncoated Magnetite Motifs

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Highly monodisperse magnetite/carbon composite microspheres with a mesoporous structure as high-performance lithium-ion battery anodes

Abstract: In this study, we propose a fabrication method for highly monodisperse magnetite/carbon (Fe3O4/C) composite microspheres with a mesoporous structure.

Cited by 8 publications

References 22 publications

Nanoporous iron oxide@carbon composites with low carbon content as high-performance anodes for lithium-ion batteries

Nanoporous iron oxide@carbon composites with low carbon content as high-performance anodes for lithium-ion batteries

In Situ Ion–Exchange Synthesis of Fe3O4 Nanosheets with 3D Hierarchically Porous Carbon Frameworks for High‐Performance Energy Storage

Shape Dependence on the Electrochemistry of Uncoated Magnetite Motifs

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In Situ Ion–Exchange Synthesis of Fe₃O₄ Nanosheets with 3D Hierarchically Porous Carbon Frameworks for High‐Performance Energy Storage