Supercritical Carbon Dioxide Anchored Fe<sub>3</sub>O<sub>4</sub> Nanoparticles on Graphene Foam and Lithium Battery Performance

Hu, Xuebo; Ma, Minhao; Zeng, Mengqi; Sun, Yangyong; Chen, Linfeng; Xue, Yinghui; Zhang, Tao; Ai, Xinping; Mendes, Rafael G.; Rümmeli, Mark H.; Fu, Lei

doi:10.1021/am5066255

Cited by 84 publications

(65 citation statements)

References 39 publications

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“…The capacity reaches 330 mAh/g on the composite basis weight which is accounted to 660 mAh/g for Fe 3 O 4 (the capacity of graphene alone was measured and is negligible). Such a value is slightly below previous ones reported in the literature for magnetite or graphene/iron oxide composite materials [11,46,47] . However, the weight loading used here (2.5 mg/cm ²) allows reaching a real capacity of 0.8 mAh/cm ² that compares favorably to previous work.…”

Section: Electrochemical Characterizations Of Nanocomposites In Li-iocontrasting

confidence: 66%

Design of Fe3–xO4 raspberry decorated graphene nanocomposites with high performances in lithium-ion battery

Gerber

Pichon

Barraud

et al. 2016

Journal of Energy Chemistry

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 16652To link to this article : a b s t r a c t Fe 3 -x O 4 raspberry shaped nanostructures/graphene nanocomposites were synthesized by a one-step polyol-solvothermal method to be tested as electrode materials for Li-ion battery (LIB). Indeed, Fe 3 -x O 4 raspberry shaped nanostructures consist of original oriented aggregates of Fe 3 -x O 4 magnetite nanocrystals, ensuring a low oxidation state of magnetite and a hollow and porous structure, which has been easily combined with graphene sheets. The resulting nanocomposite powder displays a very homogeneous spatial distribution of Fe 3 -x O 4 nanostructures at the surface of the graphene sheets. These original nanostructures and their strong interaction with the graphene sheets resulted in very small capacity fading upon Li + ion intercalation. Reversible capacity, as high as 660 mAh/g, makes this material promising for anode in Li-ion batteries application.

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Section: Electrochemical Characterizations Of Nanocomposites In Li-iocontrasting

confidence: 66%

Design of Fe3–xO4 raspberry decorated graphene nanocomposites with high performances in lithium-ion battery

Gerber

Pichon

Barraud

et al. 2016

Journal of Energy Chemistry

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“…Figure c shows the Fe‐2p XPS spectrum of the pure Fe 3 O 4 and the Fe 3 O 4 @ x ZrO 2 . The XPS pattern reveals that the binding energy values of Fe 2p 3/2 and Fe 2p 1/2 are 710.8 and 724.6 eV, respectively, close to the reported values about Fe 3 O 4 nanoparticles . Furthermore, the absence of the satellite peaks at 719.0 eV further identifies that the nanoparticles are Fe 3 O 4 but not γ‐Fe 2 O 3 .…”

Section: Resultssupporting

confidence: 77%

The Effect of Thickness‐Tunable ZrO₂ Shell on Enhancing the Tunneling Magnetoresistance of Fe₃O₄ Supraparticles

Xie

et al. 2018

Adv Materials Inter

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at room temperature. This degradation is caused admittedly by the reduced spin polarization due to the multiple effects of oxidation, defects, bonding, and surface reconstruction at the surfaces or interfaces of the polycrystal grain boundaries. Comparing to bulk materials, the nanoparticles can produce enhanced extrinsic MR owing to the effect of spin-dependent interface scattering or tunneling through the boundaries. [18] Additionally, the MR can still be increased by core-shell encapsulated structures. For example, an insulating shell coats on the magnetite core. In such a dielectric system, nanometric ferromagnetic particles show giant TMR by spin-dependent tunneling of conducting electrons at the magneticinsulator interfaces. Electrons with spin parallel to the particle magnetization have a bigger probability of tunneling than electrons with antiparallel spin, resulting in an overall lower resistance. Similar MR enhancement has been realized in Fe 3 O 4 @SiO 2 , [19] Fe 3 O 4 @ oleic acid, [20] Fe@Cr, [21] and Fe 3 O 4 @ZnS [22] system. Insulator zirconium dioxide (ZrO 2 ) is a nonmetallic inorganic material and has excellent resistance to acids and alkalis. It was widely applied in catalyst carrier and thermal barrier fields due to the stability and insulativity. Previous studies have shown that ZrO 2 doping in the perovskite systems can effectively enhance the magnetoresistance. [23][24][25] To the best of our knowledge, it is still unexploited of ZrO 2 doping in the half-metal Fe 3 O 4 nanoparticles by means of the core-shell structural system.In this paper, Fe 3 O 4 @ZrO 2 core-shell nanocomposites are prepared with controllable shell thickness and core-size. The pomegranate-like core is obtained and composed of several monocrystals and single-domain Fe 3 O 4 nanocrystals with size <10 nm. The magnetic structure and magnetotransport property of the core-shell nanocomposites are explored. Our results show that the MR is increased to ≈7.5% at 2 kOe in this core-shell system compared to that of pure Fe 3 O 4 nanoparticles ≈4.7%. Moreover, as Zr content increases, the MR first increases and then decreases. This is because the addition of insulated barrier promotes the tunneling effect, which enhances the MR, but with further increase of ZrO 2 thickness, the barrier becomes larger and the electron tunneling becomes difficult, leading to the reduced MR. In addition, the results of Fe 3 O 4 @ZrO 2 with different core sizes show that the MR rises monotonically with a decrease of the size of core. Moreover, for eliminate the possible effect of ZrO 2 permeating into the interior of the pomegranate-like core, fault-cutting is prepared andThe core-shell Fe 3 O 4 @ZrO 2 nanoparticles with controllable shell thickness and core dimensions are synthesized using solvothermal approaches. The introduction of the insulator ZrO 2 shell allows realizing the enhancement of tunneling magnetoresistance (TMR) effect of the functional nanomaterials. The influences of temperature, magnetic field, and shell thickness on the TMR are ...

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“…Magnetite (Fe 3 O 4 ) is a promising electrode material for lithium ion batteries (LIBs) due to its high theoretical capacity (924 mA h g −1 ), abundant material supply, environmental benignity, and low cost [1][2][3][4][5][6]. As Fe 3 O 4 has a low electronic conductivity, it is commonly composited with conductive materials [4,5,[7][8][9][10][11][12][13][14], for which graphene based materials are among the best choices. Examples include grafting bicontinuous mesoporous Fe 3 O 4 nanostructure onto graphene foam (GF) [10] and Fe 3 O 4 nanoparticles (NPs) anchored onto GF [13].…”

Section: Introductionmentioning

confidence: 99%

Revisiting the origin of cycling enhanced capacity of Fe3O4 based nanostructured electrode for lithium ion batteries

et al. 2017

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We identify that reversible formation/decomposition of lithium oxide, pulverization of Fe 3 O 4 nanoparticles, and electrolyte reactions, are contributors to the enhanced capacity observed in the Fe 3 O 4 electrode upon long cycling. Introducing three-dimensional graphene foam to form a composite with Fe 3 O 4 nanoparticles largely increases the capacity (~1220 mA h g −1 vs.~690 mA h g −1) and promotes the cycling induced capacity enhancement (an earlier capacity rise and a faster rising rate) of the Fe 3 O 4 electrode. Together with Fe 3 O 4 nanoparticles, the presence of graphene effectively promotes the electrolyte reactions and reversible formation/ decomposition of lithium oxide. At the same time, activation of GF also occurs in the presence of Fe 3 O 4 nanoparticles, further increases the capacity of the nanocomposite.

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Supercritical Carbon Dioxide Anchored Fe₃O₄ Nanoparticles on Graphene Foam and Lithium Battery Performance

Cited by 84 publications

References 39 publications

Design of Fe3–xO4 raspberry decorated graphene nanocomposites with high performances in lithium-ion battery

Design of Fe3–xO4 raspberry decorated graphene nanocomposites with high performances in lithium-ion battery

The Effect of Thickness‐Tunable ZrO₂ Shell on Enhancing the Tunneling Magnetoresistance of Fe₃O₄ Supraparticles

Revisiting the origin of cycling enhanced capacity of Fe3O4 based nanostructured electrode for lithium ion batteries

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Supercritical Carbon Dioxide Anchored Fe3O4 Nanoparticles on Graphene Foam and Lithium Battery Performance

Cited by 84 publications

References 39 publications

Design of Fe3–xO4 raspberry decorated graphene nanocomposites with high performances in lithium-ion battery

Design of Fe3–xO4 raspberry decorated graphene nanocomposites with high performances in lithium-ion battery

The Effect of Thickness‐Tunable ZrO2 Shell on Enhancing the Tunneling Magnetoresistance of Fe3O4 Supraparticles

Revisiting the origin of cycling enhanced capacity of Fe3O4 based nanostructured electrode for lithium ion batteries

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Supercritical Carbon Dioxide Anchored Fe₃O₄ Nanoparticles on Graphene Foam and Lithium Battery Performance

The Effect of Thickness‐Tunable ZrO₂ Shell on Enhancing the Tunneling Magnetoresistance of Fe₃O₄ Supraparticles