Subunits controlled synthesis of three-dimensional hierarchical flower-like α-Fe2O3 hollow spheres as high-performance anodes for lithium ion batteries

Qi, Xiaoxiao; Zhang, Huizhen; Zhang, Ziying; Bian, Yiang; Shen, Ao; Xu, Pingping; Zhao, Yiangqiang

doi:10.1016/j.apsusc.2018.04.253

Cited by 26 publications

(18 citation statements)

References 30 publications

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“…The slight shift in the two cathodic peaks to higher potential reveal the occurrence of some irreversible processes during the first cycle. This result is consistent with the previous findings reported in literature (Luo et al, 2012;Qi et al, 2018;Zhang et al, 2019). Figure 4B shows different cycle charge-discharge voltage profiles of the 3D hierarchical charantia-like CC/TiO 2 /Fe 2 O 3 nanotube arrays at a constant current density of 200 mA g −1 .…”

Section: Electrochemical Propertiessupporting

confidence: 92%

“…The hollow Fe 2 O 3 nanospheres are loosely assembled from numerous small nanosheets, indicating that they might have a mesoporous structure. Further, the HRTEM image shows that the lattice spacings of the 3D hierarchical charantialike CC/TiO 2 /Fe 2 O 3 nanotube arrays are 0.35 and 0.27 nm, corresponding to the (101) plane of tetragonal rutile TiO 2 and the (110) plane of α-Fe 2 O 3 , respectively (Luo et al, 2012;Qi et al, 2018). This result further confirms that the nanotube arrays were composed of tetragonal rutile TiO 2 and α-Fe 2 O 3 .…”

Section: Synthesis and Characterizationsupporting

confidence: 61%

“…These peaks located at 33.1, 35.6, and 54.1 • correspond to the (104), (110), and (116) planes of α-Fe 2 O 3 (JCPDS No. 33-0664), respectively, indicating the successful preparation of an α-Fe 2 O 3 shell on the TiO 2 nanotube core (Larcher et al, 2003;Qi et al, 2018).…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

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Binder-Free Charantia-Like Metal-Oxide Core/Shell Nanotube Arrays for High-Performance Lithium-Ion Anodes

Zhang

et al. 2020

Front. Chem.

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The performance of anodes of lithium-ion batteries relies largely on the architecture and composition of the hybrid active materials. We present a two-step, seed-free, solution-based method for the direct growth of hierarchical charantia-like TiO 2 /Fe 2 O 3 core/shell nanotube arrays on carbon cloth substrates. An ultrahigh loading of the nanomaterial on carbon fibers was achieved with this method without the use of a binder. This three-dimensional porous hollow architecture and its direct contact with the CC current collector ensure an efficient electronic pathway. The hollow TiO 2 framework effectively protects the hierarchical charantia-like TiO 2 /Fe 2 O 3 hollow core/shell arrays from collapsing because of its negligible volume change during cycling. Meanwhile, the self-assembled α-Fe 2 O 3 hollow nanospheres guarantee a large capacity and contact area with the electrolyte. This flexible anode with a 3D porous charantia-like hollow architecture exhibits high cycle performance, reversible capacity, and rate capability. These nanotube arrays maintain a high reversible capacity of 875 mAh g −1 after 200 cycles at a current density of 200 mA g −1. This simple, cost-effective, and scalable electrode fabrication strategy can be implemented in the fabrication of high-performance wearable energy storage devices.

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Section: Electrochemical Propertiessupporting

confidence: 92%

Section: Synthesis and Characterizationsupporting

confidence: 61%

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Binder-Free Charantia-Like Metal-Oxide Core/Shell Nanotube Arrays for High-Performance Lithium-Ion Anodes

Zhang

et al. 2020

Front. Chem.

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“…By self-assembling 2D MoS 2 nanosheets into three-dimensional (3D) layered porous nano-spheres with uneven surfaces, the capacity of the MoS 2 electrodes can be further improved. As we known, two-dimensional singlelayer nanosheets are highly resistant to volume changes, while highly uneven surfaces ensure more active sites (Wang M. et al, 2013;Qi et al, 2018). It was predicted that the self-assembly of 3D hierarchical MoS 2 nano-flowers with open architecture will maximize the advantages of 2D MoS 2 nanosheets.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional PrGO-Based Sandwich Composites With MoS2 Flowers as Stuffings for Superior Lithium Storage

Zhao

Zhang

et al. 2020

Front. Chem.

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Graphene-based MoS 2 nanocomposites are expected to be promising anode materials for lithium ion batteries because of their large specific capacity and high conductivity. However, the aggregation of graphene and the weak interaction between the two components hinder their practical application. Inspired by the sandwich structure, novel three-dimensional flower-like MoS 2-PrGO sandwich composites were proposed as an advanced anode material for lithium-ion batteries. The separated 2D ultrathin rGO nano-sheets were connected by PEO chains and assembled into a well-organized 3D layered spatial structure, which not only avoids the aggregation of graphene but also accommodates a high mass loading of the micro-scale MoS 2 nano-flowers. MoS 2 nano-flowers with open architecture deliver large specific area. The rGO interlayers act as a conductive framework, making all flower-like MoS 2 nano-stuffing electrochemically active. The ultra-thin 2D nano-sheets provide excellent cycle stability due to their neglectable volume changes during cycling. The 3D flower-like MoS 2-PrGO sandwich composites deliver high energy density, excellent conductivity and stable cyclic performance during charge-discharge process. With a nearly 100% coulombic efficiency, their reversible capacity is retained at 1,036 mA h g −1 even after 500 cycles at current densities of 100 mA g −1. This novel design strategy provides a broad prospect for the development of advanced anode materials for superior lithium storage.

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“…In order to overcome these shortcomings, several effective methods have been proposed, such as carbon coating,, metal ion doping,, and design of special morphological structures ,. Among them, the synthesis of compounds with unique morphological structure, and reducing the size of the particle can shorten the ion diffusion distance and improve the ion diffusion kinetics ,. The relationship between time and diffusion can be expressed as

t = L^{2} / D

, where L is the diffusion length, and D is diffusion coefficient .…”

Section: Introductionmentioning

confidence: 99%

A Simple and Low‐Cost Method to Synthesize Cr‐Doped α‐Fe₂O₃ Electrode Materials for Lithium‐Ion Batteries

et al. 2019

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Chromium-doped α-Fe 2 O 3 samples are successfully synthesized by using a ball-milling-assisted rheological phase method combined with heat treatment. The electronic properties of undoped α-Fe 2 O 3 and 4.0 at % Cr-doped α-Fe 2 O 3 are investigated by first-principles calculations. The calculation results show that Cr doping can reduce the band gap and impurity levels that appear in the band gap. The structure and morphology of the samples are evaluated by X-ray diffraction, field-emission scanning electron microscopy, and high-resolution transmission electron microscopy. The Cr-doped α-Fe 2 O 3 electrode delivers a higher reversible capacity and outstanding rate capability as the anode of a lithium-ion battery compared with the undoped α-Fe 2 O 3 electrode. The initial discharge/ charge capacities of the 4.0 at % Cr-doped α-Fe 2 O 3 electrode can reach 1624/1065.9 mAh g À 1 , respectively, and exhibit an excellent reversible capacity of 971.3 mAh g À 1 after 150 cycles at a current density of 0.1 A g À 1 . Even after 200 cycles, the capacity can remain as high as 758.1 mAh g À 1 at a current density of 0.5 A g À 1 , far beyond than that of the undoped α-Fe 2 O 3 electrode (376.5 mAh g À 1 ).

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Subunits controlled synthesis of three-dimensional hierarchical flower-like α-Fe2O3 hollow spheres as high-performance anodes for lithium ion batteries

Cited by 26 publications

References 30 publications

Binder-Free Charantia-Like Metal-Oxide Core/Shell Nanotube Arrays for High-Performance Lithium-Ion Anodes

Binder-Free Charantia-Like Metal-Oxide Core/Shell Nanotube Arrays for High-Performance Lithium-Ion Anodes

Three-Dimensional PrGO-Based Sandwich Composites With MoS2 Flowers as Stuffings for Superior Lithium Storage

A Simple and Low‐Cost Method to Synthesize Cr‐Doped α‐Fe₂O₃ Electrode Materials for Lithium‐Ion Batteries

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Subunits controlled synthesis of three-dimensional hierarchical flower-like α-Fe2O3 hollow spheres as high-performance anodes for lithium ion batteries

Cited by 26 publications

References 30 publications

Binder-Free Charantia-Like Metal-Oxide Core/Shell Nanotube Arrays for High-Performance Lithium-Ion Anodes

Binder-Free Charantia-Like Metal-Oxide Core/Shell Nanotube Arrays for High-Performance Lithium-Ion Anodes

Three-Dimensional PrGO-Based Sandwich Composites With MoS2 Flowers as Stuffings for Superior Lithium Storage

A Simple and Low‐Cost Method to Synthesize Cr‐Doped α‐Fe2O3 Electrode Materials for Lithium‐Ion Batteries

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Product

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A Simple and Low‐Cost Method to Synthesize Cr‐Doped α‐Fe₂O₃ Electrode Materials for Lithium‐Ion Batteries