α-Fe2O3@C nanorings as anode materials for high performance lithium ion batteries

Li, Le; Li, Zhenzhen; Fu, Wenming; Li, Fagen; Wang, Jun; Wang, Wenzhong

doi:10.1016/j.jallcom.2015.05.204

Cited by 22 publications

(10 citation statements)

References 30 publications

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“…Carbon could effectively buffer the stress induced by the large volume change of TMOs during the fast charging–discharging process and improve the electrical conductivity of the anodes [9,10,11]. Additionally, a carbon matrix could prevent the aggregation of the active materials during repeated cycles by surrounding them, which increases the structural stability of anode materials [12,13]. Therefore, various synthesis strategies for TMOs/carbon composites have been introduced [14,15,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

Large Scale Process for Low Crystalline MoO3-Carbon Composite Microspheres Prepared by One-Step Spray Pyrolysis for Anodes in Lithium-Ion Batteries

Cho

2019

Nanomaterials

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This paper introduces a large-scale and facile method for synthesizing low crystalline MoO3/carbon composite microspheres, in which MoO3 nanocrystals are distributed homogeneously in the amorphous carbon matrix, directly by a one-step spray pyrolysis. The MoO3/carbon composite microspheres with mean diameters of 0.7 µm were directly formed from one droplet by a series of drying, decomposition, and crystalizing inside the hot-wall reactor within six seconds. The MoO3/carbon composite microspheres had high specific discharge capacities of 811 mA h g−1 after 100 cycles, even at a high current density of 1.0 A g−1 when applied as anode materials for lithium-ion batteries. The MoO3/carbon composite microspheres had final discharge capacities of 999, 875, 716, and 467 mA h g−1 at current densities of 0.5, 1.5, 3.0, and 5.0 A g−1, respectively. MoO3/carbon composite microspheres provide better Li-ion storage than do bare MoO3 powders because of their high structural stability and electrical conductivity.

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Section: Introductionmentioning

confidence: 99%

Large Scale Process for Low Crystalline MoO3-Carbon Composite Microspheres Prepared by One-Step Spray Pyrolysis for Anodes in Lithium-Ion Batteries

Cho

2019

Nanomaterials

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“…According to a previous report, the first small cathodic peak at 1.60 V corresponds to the intercalation of lithium ions into the crystal structure of the Fe 2 O 3 lattice. The second peak at 1.19 V could be discerned to correspond to the transformation of hexagonal Li x Fe 2 O 3 to cubic Li 2 Fe 2 O 3 .…”

Section: Resultsmentioning

confidence: 69%

“…According to ap revious report, [41] the first smallc athodic peak at 1.60 Vc orresponds to the intercalationo fl ithium ions into the crystal structure of the Fe 2 O 3 lattice. The second peak at 1.19 Vc ould be discerned to correspond to the transformation of hexagonal Li x Fe 2 O 3 to cubic Li 2 Fe 2 O 3 .T he formationo f ap artially reversible solid-electrolyte interface (SEI) film and the complete reduction of iron from Fe 2 + to Fe 0 with the for- In the anodic process, two broad oxidation peaks at 1.68 and 1.89 Vc an be ascribed to partial decompositiono ft he SEI film and reversible oxidation of Fe 0 to Fe 3 + ,r espectively.I ns ubsequent cycles, the reduction peaks are replaced by two peaks centereda t1 .45 and 0.80 V, and thus, the oxidation peaks remain nearly unchanged.…”

Section: Resultsmentioning

confidence: 99%

A Core–Shell Fe/Fe₂O₃ Nanowire as a High‐Performance Anode Material for Lithium‐Ion Batteries

Huang

Liang

et al. 2016

Chemistry A European J

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The preparation of novel one-dimensional core-shell Fe/Fe2 O3 nanowires as anodes for high-performance lithium-ion batteries (LIBs) is reported. The nanowires are prepared in a facile synthetic process in aqueous solution under ambient conditions with subsequent annealing treatment that could tune the capacity for lithium storage. When this hybrid is used as an anode material for LIBs, the outer Fe2 O3 shell can act as an electrochemically active material to store and release lithium ions, whereas the highly conductive and inactive Fe core functions as nothing more than an efficient electrical conducting pathway and a remarkable buffer to tolerate volume changes of the electrode materials during the insertion and extraction of lithium ions. The core-shell Fe/Fe2 O3 nanowire maintains an excellent reversible capacity of over 767 mA h g(-1) at 500 mA g(-1) after 200 cycles with a high average Coulombic efficiency of 98.6 %. Even at 2000 mA g(-1) , a stable capacity as high as 538 mA h g(-1) could be obtained. The unique composition and nanostructure of this electrode material contribute to this enhanced electrochemical performance. Due to the ease of large-scale fabrication and superior electrochemical performance, these hybrid nanowires are promising anode materials for the next generation of high-performance LIBs.

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“…The XRD pattern of the CNTs/α-Fe 2 O 3 composite has a similar diffraction to α-Fe 2 O 3 . However, unobserved CNTs signal in the XRD pattern indicates the amount of CNTs in the sample was very low and the loading content of CNTs didn’t affect the crystal structure of α-Fe 2 O 3 [ 30 ]. More composition information can be confirmed by the Raman spectra, the Raman spectra of α-Fe 2 O 3 [ 31 ], CNTs and CNTs/α-Fe 2 O 3 -Sx in a range of 800–1800 cm −1 as shown in Figure 2 b. Raman spectrum of CNTs/α-α-Fe 2 O 3 -Sx with two peaks at 1330 and 1585 cm −1 assigned to D and G bands confirms the presence of CNTs in the nanocomposite [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

One-Step Construction of Multi-Walled CNTs Loaded with Alpha-Fe2O3 Nanoparticles for Efficient Photocatalytic Properties

Wen

Zhang

et al. 2021

Materials

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The aggregation and the rapid restructuring of the photoinduced electron−hole pairs restructuring in the process of photoelectric response remains a great challenge. In this study, a kind of Multi-walled carbon nanotubes loaded Alpha-Fe2O3 (CNTs/α-Fe2O3) heterostructure composite is successfully prepared via the one-step method. Due to the synergistic effect in the as-prepared CNTs/α-Fe2O3, the defect sites and oxygen-containing functional groups of CNTs can dramatically improve the interface charge separation efficiency and prevent the aggregation of α-Fe2O3. The improved photocurrent and enhanced hole–electron separation rate in the CNTs/α-Fe2O3 is obtained, and the narrower band gap is measured to be 2.8 ev with intensive visible-light absorption performance. Thus, the CNTs/α-Fe2O3 composite serves as an excellent visible light photocatalyst and exhibits an outstanding photocatalytic activity for the cationic dye degradation of rhodamine B (RhB). This research supplies a fresh application area forα-Fe2O3 photocatalyst and initiates a new approach for design of high efficiency photocatalytic materials.

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α-Fe2O3@C nanorings as anode materials for high performance lithium ion batteries

Cited by 22 publications

References 30 publications

Large Scale Process for Low Crystalline MoO3-Carbon Composite Microspheres Prepared by One-Step Spray Pyrolysis for Anodes in Lithium-Ion Batteries

Large Scale Process for Low Crystalline MoO3-Carbon Composite Microspheres Prepared by One-Step Spray Pyrolysis for Anodes in Lithium-Ion Batteries

A Core–Shell Fe/Fe₂O₃ Nanowire as a High‐Performance Anode Material for Lithium‐Ion Batteries

One-Step Construction of Multi-Walled CNTs Loaded with Alpha-Fe2O3 Nanoparticles for Efficient Photocatalytic Properties

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α-Fe2O3@C nanorings as anode materials for high performance lithium ion batteries

Cited by 22 publications

References 30 publications

Large Scale Process for Low Crystalline MoO3-Carbon Composite Microspheres Prepared by One-Step Spray Pyrolysis for Anodes in Lithium-Ion Batteries

Large Scale Process for Low Crystalline MoO3-Carbon Composite Microspheres Prepared by One-Step Spray Pyrolysis for Anodes in Lithium-Ion Batteries

A Core–Shell Fe/Fe2O3 Nanowire as a High‐Performance Anode Material for Lithium‐Ion Batteries

One-Step Construction of Multi-Walled CNTs Loaded with Alpha-Fe2O3 Nanoparticles for Efficient Photocatalytic Properties

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A Core–Shell Fe/Fe₂O₃ Nanowire as a High‐Performance Anode Material for Lithium‐Ion Batteries